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WATERQUALITYCONTROLDEPTService Obligations and Key Performance Indicator Guidance Document on Water Supply for Manila Water Company, Inc.

This document provides guidance on the implementation of the 2007 Philippine National Standards for Drinking Water, the Philippine Clean Water Act of 2004 and its Implementing Rules and Regulations, and DENR Administrative Order No. 34 as they apply in evaluating the Concessionaires’ service performances on Water Supply.

January 2010

TRA-WQCD-SPI/ KPI-BEMS GUIDE DOC-WSPage: 1 of 2

Revision No. : 0

Date: 04 December 2009

Table of Contents

REGULATORY OFFICE

Prepared by: Conformed by: Noted by:

JORGE C. MATEO Manager, Water Quality Control


FRANK BEAUMONT Sr. Group Director, Operations Manila Water Company, Inc.

ENGR. TIMOTEO C. VILLAROMAN Deputy Administrator for Technical

Regulation MWSS Regulatory Office

Date: Date: Date:

TABLE OF CONTENTS

No. of Pages

I. Introduction 1

II. Safe and Potable Water Supply 1

III. Interpretations 3

IV. Monitoring: Water Supply Zone 10

V. Monitoring: Other Provisions 3

VI. Collection of Samples 2

VII. Training of Samplers 1

VIII. Analysis of Samples 1

IX. Investigations 4

X. Notification to Consumers 2

XI. Provision of Information 1

XII. KPI W4- Water Quality at Plant Outlet 2

XIII. KPI W5- Water Quality in the Distribution System 2

XIV. KPI W6- Water Supply Sampling 1

APPENDIX

Table 1 The 2007 Philippine National Standards for Drinking Water 8

Table 2 Water Quality in the Supply Zone (Consumers’ Taps) 3

Table 3.1 Water Quality at the Water Treatment Works – Check monitoring 1

Table 3.2 Water Quality at the Treatment Works- Audit monitoring 3

Table 4 Water Quality in the Service Reservoir 1

Table 5 Monitoring of existing raw water sources 3

TRA-WQCD-SPI/ KPI-BEMS GUIDE DOC-WS

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Table of Contents

REGULATORY OFFICE




FRANK BEAUMONT

Sr. Group Director, Operations Manila Water Company, Inc.

ENGR. TIMOTEO C. VILLAROMAN

Deputy Administrator for Technical Regulation

MWSS Regulatory Office Date: Date: Date:

REFERENCES

1. The 2007 Philippine National Standards for Drinking Water (DOH)

2. The Code on Sanitation of the Philippines (PD 856)

3. Water Code of the Philippines and the Implementing Rules and Regulations (NWRB)

4. Implementing Rules and Regulations of Chapter II (Water Supply) of PD 856 (DOH)

5. Revised Water Usage and Classification Water Quality Criteria (DENR AO No. 34)

6. Concession Agreement

7. The Water Supply (Water Quality) Regulations 2001 in England and Wales

8. US Environmental Protection Agency Drinking Water Standards

9. Guidelines for Drinking- water Quality, Volume 1: Recommendations (WHO)

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INTRODUCTION REGULATORY

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Department MWSS Regulatory Office

FRANK BEAUMONT

Sr. Group Director, Operations Manila Water Company, Inc..




SERVICE PERFORMANCE AND KPI- BEMs GUIDANCE DOCUMENT ON WATER SUPPLY QUALITY 1. This document provides guidance in the implementations on the requirements of the recently revised

Philippine National Standards for Drinking Water (PNSDW), the Philippine Clean Water Act (PCA) of 2004 and its Implementing Rules and Regulations (DAO 2005-10) including all relevant local and national environmental laws and regulations, as well as the requirements of the 2010 Key Performance Indicator and Business Efficiency Measures (KPI-BEMs) established for the rebase period in Concessionaire’s service obligations relating to drinking water quality. Unless otherwise specified, reference within this document to the “Regulations” shall mean the 2007 PNSDW for water supply, PCA and its Implementing Rules and Regulations, the Department of Environment and Natural Resources (DENR) Administrative Order (AO) No. 34. However, this guidance may be superceded by more recently issued regulations or guidance and Concessionaire would be wise to check recent information and regulations issued by either the Department Of Health or the DENR.

2. This document sets guidance to the Concessionaire in the performance of its service obligations on

water supply as stipulated in the Concession Agreement Section 5.1, as well as the KPI- BEMs requirements for the rebase period 2010 to 2012. Required information on the performance of the Concessionaire in its service obligations on water supply as a rule has been submitted to MWSS RO every quarter as Service Performance Information Report (SPI); while KPI- BEMs report is required to be submitted on a monthly basis. It is the intention of this Guide Document to combine the two reports into just one (!) report and to be submitted monthly. However, information required by the KPI- BEMs must be regularly reported on a monthly basis while other information which was normally reported in the SPI shall be included in each quarter or semi-annual KPI- BEMs report.

3. This document does not purport to offer any authoritative interpretation of the Regulations issued by

the Department of Health (DOH) or the Department of Environment and Natural Resources (DENR) or any other regulating agency. It is recognized that it may contain omissions and that some requirements in this document will need to be modified or updated as more experience is gained with implementing new Regulations or new publications or guidance issued by any regulating agency, thus it is the intention that RO reviews the Guidance Document annually.



Safe and Potable Water Supply REGULATORY

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1. The revised Philippine National Standards for Drinking Water (2007 PNSDW) implements the

Water Supply of The Code on Sanitation of the Philippines (Presidential Decree No. 856). This guidance document has been prepared in conformance with the requirements of all the aspects set out and specified in the 2007 PNSDW. All acceptable or maximum values for drinking water quality parameters set out by the Standards for microbiological, physical, chemical as well as radiological composition of the water supply are similarly set out in this guidance. However, few modifications are set in some of the parameters that are recently included in the list of the parameters required in the 2007 PNSDW.

2. Safe and Potable Water Supply

The 2007 PNSDW prescribes standards of safe and potable water supply in respect of water supplied by water companies. In particular, the Regulation requires that the quality of water intended for human consumption must meet the requirements of the revised PNSDW (2007 PNSDW) and this must be complied with at which it emerges from the taps that are normally used for human consumption. Table 1 found in the Appendix contains all the standard parameters and their corresponding prescribed concentration values (PCV) or maximum allowable limit (MAL) or standard values that characterizes a potable and safe water supply. Prescribed method of analyses are also included in the table.



Interpretation REGULATORY

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In this document –

“audit or low frequency monitoring” means monitoring for the purpose of obtaining information from which it may be established (a) as the parameters listed in Tables 2 and 3, and (b) whether the water supplied satisfies the requirements of the 2007 PNSDW; “check or high frequency monitoring” means monitoring for the purpose of obtaining information at regular intervals (a) as to the organoleptic and microbiological quality of water, and (b) where relevant, as to the effectiveness of drinking water treatment; “consumers’ tap” is a sampling point to establish whether the water supplied meets the 2007 PNSDW requirements and these are referred to as those taps that are normally used for drinking, cooking, food preparation or other domestic purposes; “disinfection” means a process which removes or renders inactive pathogenic micro-organisms so as to satisfy the requirements of the 2007 Philippine National Standards for Drinking Water on Microbiological Quality; “groundwater or deepwell water” means water contained in underground strata; “health authority” means the Local Health Authority or the Department of Health; “local authority” means the Local Government Unit; “parameter” means a property, element, organism or substance listed in the Tables found in the Appendix; “pesticides and related products’ means (a) any organic insecticide, (b) any organic herbicide, (c) any organic fungicide, (d) any organic nematocide, (e) any organic acaricide, (f) any organic algicide, (g) any organic rodenticide, (h) any organic slimicide, and (i) any product related to any of (a) to (h) (including any growth regulator); and includes their relevant metabolites, degradation and reaction products. Relevant should be taken to mean any metabolites, degradation and reaction products that have similar pesticidal properties to their parent pesticides; “other pesticides” shall mean to apply to each individual pesticide, also including any relevant metabolite, degradation and reaction product;




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“total pesticide” means the sum of the detected concentrations of the individual pesticides and any relevant metabolites, degradation and reaction products detected and quantified in the samples taken on a particular sampling occasion from a sampling point. This definition recognizes that more than one sample may be taken on a particular sampling occasion from a sampling point to enable all the pesticides of interest to be determined; “prescribed concentration or value”, in relation to any parameter, means the maximum or minimum concentration or value specified in relation to that parameter in the Tables as measured by reference to the unit of measurement as specified; “sampling point” means in relation to water supplied from a distribution network, means a point, being a consumer’s tap, that is selected for the purpose of regulations; “service reservoir” are referred to any structure, other than a structure at a treatment works or within the supply zone, in which a reserve of water that has been treated with a view to complying with the requirements of PNSDW is contained and stored for the purpose of meeting a variable demand for the supply of water;

Where references to a service reservoir would include references to a structure comprising more than one compartment – (a) each compartment which has its own water inlet and water outlet and is not connected

hydraulically to any other compartment shall be treated as a single service reservoir;

(b) the compartments that are connected hydraulically shall be treated as a single service reservoir; and

(c) unless all the compartments are connected hydraulically, the structure as a whole shall not be treated as a service reservoir.

“water treatment works” means all structures that provide treatment using or applying conventional process, reverse osmosis, or just disinfection, or any combination of treatment mentioned in the above, or any other treatment process not found in the above which has been applied to raw water source for the purpose of supplying water for the regulations;




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“supply point” in this document may be:

treatment works service reservoirs (prior to supply to customers) blending points

“blending point” means a point at which treated waters, originating from two or more sources, are combined under controlled conditions. In practice, blending is normally accomplished by the controlled mixing of treated waters in service reservoirs and specific sections of trunk main. The position of any sample tap at a blending point, if ever any, should be carefully selected to ensure that adequate mixing has taken place prior to the sample.



Monitoring: Water Supply Zone REGULATORY

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Monitoring the Water Supply Zone

1. Water Supply Zone (distribution system)

(a) The guidance document requires Concessionaire to first identify the names and areas within its area of supply that are to be supplied from single sources. A source could be the outlet of a water treatment works, a pumping station, a blending point or service reservoir. A discreet area supplied from a single source should always be recorded as a single water supply zone regardless of the number of population in that identified supply zone.

(b) The purpose of supply zone delineation is to identify areas of supply which do not have significant differences in water quality. The water quality indicated by sampling within the supply zone should be generally representative of the water supplied to the whole area of the zone. It is recognized, however, that in some instances the water quality indicated by a sample taken from the tap may be influenced by the domestic distribution system within a consumer’s property. (c) It is recognized that Concessionaire has to take temporary operational actions to maintain water supplies that may involve introduction of water from sources not designated for that supply zone. Such temporary measures should not influence the annual designation of water supply zones. If permanent changes have to be made to that sources that supply a zone or to the delineation of that zone the designation of the zone can only be changed for the next calendar year.

2. Sampling point

In the document, a “sampling point” shall mean the consumer’s tap that is selected for

monitoring purposes, and these are the taps that are normally used for drinking, cooking, food preparation purposes irrespective of whether any upstream devices such as water softeners or filters are present. Garden taps should not be used for regulatory samples because the intent of the regulation is to protect public health. However, this document contains provisions for deterioration of the water quality caused by the domestic plumbing. Concessionaire is not responsible for any deterioration in water quality that may arise as a result of the domestic distribution.




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3. Number of samples

(a) For the purpose of determining whether water supplied in the distribution system satisfies the 2007 PNSDW requirements, Concessionaire shall take and analyze not less than the number of samples specified in Table 2. The table specifies that Concessionaire conduct monitoring in two (2) types of frequencies; the check or high frequency monitoring, and audit or the low frequency monitoring. Concessionaire is requested to refer to Table 2 on the parameters identified for each type of monitoring frequency. (b) It is recognized that Concessionaire will wish to carry out some additional sampling to provide additional information on the quality of water supplies. Concessionaire may prefer to manage such monitoring within a separate non-compliance sampling program with individual samples identified by a separate sample reason code. (c) Concessionaire may carry out sampling for both compliance and non-compliance purposes on the same sampling occasion provided that the samples taken are identified by separate unique sample numbers or other auditable process (with the appropriate sample reason). (d) If concessionaire wishes to carry out additional sampling within the regulatory monitoring program it should not program significantly above the numbers specified for selected parameters in order to influence compliance statistics.

4. Check and audit monitoring

Two forms of monitoring of United Kingdom, i.e. check and audit monitoring, are applied in this document. The purpose of check (high frequency) monitoring is to provide regularly, information on the microbiological and the organoleptic quality of water supplied for human consumption, as well as the effectiveness of water treatment where it is used. The purpose of audit monitoring (which applies to all those parameters not subject to check monitoring) is to provide the information necessary to determine whether or not all the tests meet the standard values. Certain parameters such as Escherichia coli, coliform bacteria, color, pH, odor, taste and turbidity must always be subject to check monitoring. For other parameters such as iron and aluminum, the monitoring requirement will depend on whether they are used in the treatment process.




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(a) The relevant frequencies are specified in Table 2 for water supply in the distribution system or water supply zone; (b) In practice, there are five (5) parameters which can either be monitored at the check (high) monitoring frequency or audit (low) monitoring frequency, depending on the following circumstances:

(i) aluminum and iron are to be monitored at audit (low) monitoring frequency unless they

are used as a flocculants or coagulant; or the water originates from, or is influenced by surface waters, in which case the check monitoring frequency applies;

(ii) manganese is to be monitored at the low or audit monitoring frequency unless the water originates from or is influenced by surface waters, in which case the high (check) monitoring frequency applies;

(iii) nitrite and nitrate are to be monitored in the distribution waters at the low or audit monitoring frequency unless chloramination is practiced at WTWs, when the high (check) monitoring frequency applies in the distribution waters. However, based on the monitoring data on these two parameters in the previous five (5) years which were very much lower than the maximum allowable limit, MWSS RO decided that nitrite can then be monitored at WTWs at the low (audit) monitoring frequency unless chloramination is practiced, in which case the high (check) monitoring frequency applies in the distribution waters.

(iv) Concessionaire should consider undertaking additional operational monitoring at groundwater sources which have significant natural concentrations of iron and/or manganese.

(c) In this document, there is no monitoring requirement for acrylamide, epichlorohydrin and vinyl chloride because these parameters are to be controlled by specifying the maximum concentration permitted in the products used for treatment and distribution, which is yet to be established by the RO in coordination with the Department of Health.

5. Sampling at regular intervals

(a) The Regulation requires samples to be taken at regular intervals. Regular sampling will mean having a suitable spread of sample to detect possible variation in water quality due to seasonal change. It is important that there is a good spread between the sampling events and a good spread of sampling occasions across the year. Parameters specified for annual monitoring should be conducted at




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appropriate times, e.g. following the onset of heavy rainfall after a prolonged dry weather. The requirement for regular sampling does not mean that the sampling occasions have to be spread at exactly equal intervals. (b) In the case Concessionaire fails to take or analyze a sample, through no fault of its own, e.g., a dropped sample bottle, it will be expected to reschedule a further sample as soon as possible. The resample should be taken well in advance of the next programmed sample. RO considers that only in exceptional circumstances will it not be possible to resample in advance of the next programmed sample. Each case will be reviewed on its merits. Since the guidance/ regulations require the frequencies to be met on an annual basis rescheduling does not constitute a shortfall. Provided the resampling is prompt, occasional occurrences of this type will not be regarded as a failure to meet the requirements set in this document. (c) In case of breakdown at the treatment works, Concessionaire is required to, through phone call or verbal, immediately notify MWSS RO at the onset of the incident, followed by a written notification specifying the nature of the breakdown and the immediate remedial actions undertaken to ensure that the quality of the product water does not constitute adverse effect on the health of its consumers, and if ever any, long term actions shall also be included in the written notification. The written notification must also indicate target date of completion including any other related activities necessary to prevent recurrence of the same incident.

6. Random selection of sampling points

(a) Sampling points in respect of every parameter shall be selected at random except in relation to those parameters where monitoring from supply points (water treatment works or service reservoirs) has been allowed by the RO. Concessionaire is expected to use a sampling program that selects sample points at random from a comprehensive list of its consumers, including public buildings such as schools, hospitals, etc.; (b) The method applied by Concessionaire should ensure random selection from a customer list to produce an individual target address or a sampling location such as house number and name of street or a designated postcode. If a sample cannot be obtained from the target sample address a neighboring property should be chosen and appropriate records amended accordingly.




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7. Sampling siting plan

(a) Each beginning of the year Concessionaire must submit to RO sample siting plan for its review and revision if necessary according to a process established by the Metro Manila Drinking Water Quality Committee so that plan’s adequacy is ensured; (b) Concessionaire should sample according to a written site-specific plan reviewed, evaluated and approved by the RO and/or the Metro Manila Drinking Water Quality Monitoring Committee (MMDWQCMC).

8. Reduced frequency monitoring

(a) The reduced frequency monitoring is not a deviation from the standards but trying to define how to establish monitoring frequency because PNSDW is not explicit on the frequency of other parameters except for bacteriological. (b) In this document, a reduced number of samples may be allowed for those parameters that are subject to high frequency monitoring provided specified conditions are met.

(1) One of the conditions is that Concessionaire believes that the quality of the water supplied to its service area is unlikely to deteriorate taking into account the following factors. Whether there:

(i) has been any change in the activities within the catchment or the condition of the

catchment which is likely to have an adverse effect on the quality of the raw water; (ii) there is any evidence of a general deterioration in the quality of water, or the water

supplied from the treatment works; (iii) is any evidence of a general deterioration in the quality of water as it passed through

the distribution system to consumers’ properties.

(2) Another of the conditions is that the results of the analysis of samples in each of two successive years show no significant variation and, except for colony or the heterotrophic plate counts and pH value, the concentration or value is significantly lower than the maximum allowable limit or prescribed concentration or value.




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(i) For aluminum, color, TDS, iron, manganese and turbidity a significant variation is when any result deviates from the arithmetic mean concentration or value, in either of the two years, by more than 20% of the prescribed concentration or value. For these parameters significantly lower is when all the values in each year are below 50% of the maximum allowable concentration or value.

(ii) For taste and odor a reduced frequency can only be applied when all the results in the

two years have been 1 dilution number or no objectionable taste and odor has been detected in all the results.

(iii) For colony counts (heterotrophic plate count), no significant variation and no change

are observed for all the results obtained in the two years that is within one order of magnitude.

(iv) For the hydrogen ion parameter, no significant variation is when all the results for pH

value in the two years are within a spread of 1 pH unit. A reduced frequency cannot be applied when any result is below a pH value of 6.5 or above a pH value of 8.5.

Reduced frequency on the parameters mentioned in the above shall be established by MWSS RO at the soonest time after a request has been received from Concessionaire following the conditions indicated in 8(b).

9. Authorization to sample from supply points

(1) Pesticide

(a) It is not practical or necessary to monitor for every pesticide that is used within the

catchment of a water source. The RO recognizes this by noting that only pesticides that are likely to be present in a given supply need to be monitored. The advice that follows assumes that Concessionaire uses the option of sampling for pesticides at water treatment works, instead of the distribution system.

(b) To effectively implement the requirement of the Regulation, Concessionaire is required to

develop a monitoring strategy for pesticides at each treatment works based on the likely risk of particular pesticides being present in the water source or sources from which water is abstracted for treatment at that treatment works. In developing a monitoring strategy Concessionaire is expected to:




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(i) assess as far as practicable which pesticides are used in significant amounts within the catchment area of each water source;

(ii) assess as far as is practicable on the basis of the properties and method of use of

these pesticides, and local catchment knowledge, whether any of these pesticides are likely to reach each water source in the catchment area;

(iii) take into account the results of any monitoring for pesticides in water sources or

other water supplies for pesticides carried out previously by the company; and (iv) take into account the results of the compliance monitoring of other water supplies, if

there is any, or from Fertilizers and Pesticides Authority (FPA), DENR or any other agencies.

(c) On the basis of that strategy, the water leaving each treatment works should be monitored

at the frequency specified in Table 3 for each of the pesticides identified as likely to reach a water source from which water is abstracted to that treatment works. Where a treatment works has a treatment process installed to remove pesticides or reduce the concentration of pesticides, Concessionaire must include in its monitoring strategy for that treatment works those pesticides for which the treatment process has been installed.

(d) Aldrin, dieldrin, heptachlor and heptachlor epoxide must be included in the monitoring

strategy for each treatment works unless Concessionaire has received a waiver from RO. The Regulatory Office recognizes that these pesticides have not had approved use for many years and that a monitoring program for these pesticides may not be necessary. However they can be persistent in the environment and occasional detections in drinking water have occurred (EMB). If Concessionaire is of the opinion that there is convincing evidence that these pesticides are not detectable in the water supplied from the treatment works, Concessionaire may apply for a waiver from the RO. To apply for a waiver, it should submit a reasoned case, backed up with whatever data are available. A normal global practice includes a minimum of three years’ data from the most recent period when monitoring was conducted. The data must have a limit of detection well below the standard. The frequency of monitoring should be at least that specified in the Regulation. Regulatory data, where appropriate, can be supplemented by relevant operational data, or data from other organizations.




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(e) All other pesticides not mentioned in paragraph (d) above shall be regulated as total pesticides & other related products with 0.500 g/l and 0.10 g/l, respectively, as the prescribed maximum allowable limit similar to US EPA and the United Kingdom standards. Pesticides individually listed in the PNSDW shall remain in effect with their corresponding prescribed maximum allowable concentration not to be exceeded if detected present in the water supply.

(f) If at any time Concessionaire has any reasonable grounds for believing that a pesticide not

included in its monitoring strategy for a particular works could be present at a concentration in excess of the standard, it must include that pesticide in its monitoring strategy for that works as soon as practical. It may also be appropriate and advisable for Concessionaire to carry out operational monitoring for that pesticide in the water source or sources from which water is abstracted to the treatment works in order to provide additional information about the behavior of the pesticide.

(g) Towards the end of each calendar year, Concessionaire should review its monitoring

strategy for each treatment works using the guidance above. A particular pesticide may be omitted from the monitoring strategy if it has not been detected at significant concentrations in the water supplied from the works in the previous three calendar years compliance monitoring. At works where a pesticide removal treatment process has been installed, any pesticide that has been found above the standard in that source can only be omitted from the monitoring strategy for that treatment works if Concessionaire can show, from at least three years operational monitoring of the water source or sources from which the water is abstracted, that the pesticide is no longer detected at significant concentrations in the water source or sources.

(h) It is recognized that particular analytical methods for pesticides enable a suite of pesticides

of similar chemical structure or properties to be determined. Concessionaire may continue to monitor all the pesticides in the suite even if a particular pesticide could be omitted because it has not been detected in the previous three years.

(i) The standards for pesticides apply at the consumers’ taps. However, the RO allows

Concessionaire to monitor compliance with those standards by taking samples for pesticides from treatment works or other supply point because the results of the analysis of such samples are unlikely to differ in any material respect from the results of the analysis of samples taken from the consumers’ taps.




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(2) Disinfectant by products (DBPs) including trihalomethanes

The question rises in the past on the availability of a local laboratory to conduct the

required test. At the present, there are locally available environmental laboratories that can perform testing of these parameters. The RO may allow Concessionaire to monitor for DBPs including THMs at the treatment works and not in the consumers’ taps if the integrity of its water network has been proven efficient based on its compliance record in the previous three (3) years for bacteriological quality, residual disinfectant and HPC level. Frequency of monitoring for DBPs is not indicated in Table 3.b except for bromate; however, regulation for the other DBPs shall not be, however, limited only to bromate and the THM compounds; other DBPs listed in the Regulation if found present in the water supply at the level way above the prescribed concentration value in the treated water supply shall remain enforceable.

(3) Industrial pollutants with health significance parameters

(a) The 2007 PNSDW deleted the parameter “petroleum oil and grease” because prescribed

method prescribed in the 1993 PNSDW to test for the said contaminant is able to extract all biological lipids from both plants and animals of origin, along with the real target contaminants which are petroleum products and their derivatives when in fact only the relatively volatile hydrocarbons which are the targets of interest are lost in the evaporation step of the gravimetric method.

To address the concern on the contaminations of the water supply from petroleum

hydrocarbons, Concessionaire is required to monitor for, at the minimum, benzene, toluene, ethylbenzene, and xylene in the distribution waters and at WTWs.

(b) In the 2008 to 2012 rebase period, there is no monitoring requirement for some

parameters, however, other industrial pollutants in the Regulation if found present in the water supply at the level way above the prescribed concentration value in the treated water supply shall remain enforceable.

(4) Radioactivity monitoring

(a) The Regulation requires sampling of water supplies for the determination of radioactivity.

Sampling is to be undertaken in the WTWs at audit (low) frequency specified in Table 3.




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(b) RO recognizes that water companies will require further advice from DOH or the

Philippine Nuclear Research Institute on monitoring for radioactivity. The RO may exempt the concessionaires from monitoring for radiological parameters if the RO is satisfied that the water supply is well below the specification for the relevant parameters. The RO will notify concessionaires where it has been satisfied that there is sufficient information to establish that water supplies meet these criteria and there is therefore no need for audit monitoring. Unless a Notice has been received by the Concessionaire from DOH, PNRI or the RO, Concessionaire must continue to monitor at its water treatment works for gross alpha and gross beta at the audit frequency set in Table 3.

(5) Antimony. copper, lead, cadmium and nickel - The guidance document specifies that sampling of water supplies at the consumer’s tap for antimony, copper, lead and cadmium at the audit (low) frequency specified in Table 2. Samples to these parameters must always be taken at the consumers’ taps. The sampling point should be selected from the random sampling program and the sample should be the first one (1) liter of water drawn from the tap without flushing.



Monitoring: Other Provisions REGULATORY

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Monitoring: Other provisions

1. Sampling at water treatment works (WTWs)

(a) This document requires water companies to ensure that samples for E. coli, coliform bacteria, heterotrophic plate count, residual disinfectant, and turbidity are taken at the frequency specified in Table 3 from the point at which water leaves each treatment works. All five parameters should be monitored at the flow related frequencies set out against these five (5) parameters. It is assumed that chlorination is the only disinfection treatment applied by the Concessionaire, thus nitrate and nitrite are not considered for high frequency monitoring.

(b) The 2007 PNSDW requires, similar to international regulations, that sampling frequencies can be based on the volume of water supplied in m3/day. Sampling frequencies are based on the average daily output from the works during the previous calendar year except where it is known that the current year’s average daily output will be significantly different from the previous year’s average daily output. In this document, it is assumed that raw water source belongs to the classification Class AA or Class A for any WTWs and has been granted approval by the concerned regulating agency as source for domestic supply. Where there is more than one outlet at a works requiring separate sampling points, the sampling frequency is determined separately for each sampling point based on the average daily output at each point. (c) Thus, Concessionaire is expected to establish prior to the start of the calendar year, its annual sampling frequency for each works based on the previous year’s average daily output from the works or the anticipated average daily output for the current year. Concessionaire with treatment works whose output may vary considerably at different times of the year for extended periods should consider adjusting the frequencies in accordance with the average daily output for those periods. (d) Section 8 under Monitoring: Water Supply Zone provides for a reduced frequency of sampling for heterotrophic plate count (HPC) parameter when there has been no significant increase in the counts in each of two successive years. Colony counts (HPC), particularly for surface water derived supplies, are likely to vary seasonally because of changes in quality and temperature. A significant increase should be regarded as a count, which is more than one order of magnitude greater than that normally expected for the time of year the sample was taken for the treatment works in question. (e) For works on daily sampling, if Concessionaire fails to take or analyze a sample through no fault of its own, e.g., a dropped sample bottle, it will be expected to reschedule a further sample for the same day if possible or the following day. On the following day the resample should be taken at a




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significant time interval before or after the sample programmed for that day. Since the Guidance requires the frequencies to be met on an annual basis rescheduling does not constitute a shortfall. Provided the resampling is as described above an occasional occurrence will not be regarded as a failure to meet the regularity requirement. (f) For sampling purposes a treatment works is considered to be in service every day (midnight to midnight) that any treated water is supplied from the works.

2. Sampling at service reservoir (SR)

(a) The Regulation requires water companies to take sample from every reservoir but it is not definitive as to the frequency of sampling. Hence in this document, RO sets the Concessionaire should take a sample from every reservoir every week it is in use. These samples must be analyzed for coliform bacteria, E. coli, HPC, residual disinfectant, color and turbidity (Refer to Table 4 found in the Appendix).

(b) Ideally the day within each week that the sample is taken should be randomized. However, it is recognized that it may not be practical to fully randomize the day of sampling and in such cases the sampling program should be managed to ensure some variation in the day of the week in which the sample is taken.

(c) If a water company fails to take or analyze a sample through no fault of its own, e.g., a dropped bottle, it will be expected to reschedule a further sample for the same week. In exceptional circumstances, if a sample cannot be programmed the same week the RO may take a lenient view of the shortfall, provided the resample is scheduled for the following week on a day separate from and not consecutive to the day of the sample programmed for that week.

3. Sampling for new sources

(a) This section outlines the sampling requirement for:

(i) new sources including sources that have not been used since the last 5 year, and (ii) sources that have not been used for a period of 1 year or less.

(b) Those in (i) must be sampled before they are put into supply subject and be subjected to full monitoring as required by the regulation prior to introduction to supply. The RO expects




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Concessionaire to follow this requirement to the letter for all genuinely new sources. The sampling for this category sources must include all the parameters set in the 2007 PNSDW, and any other element, substance or organism likely to make the supply unsafe or not potable.

(c) Sources in category (ii) must be sampled as soon as practicable after the source is put into supply. It must be subject to limited monitoring after return to supply and may be wise for the Concessionaire to conduct some operational monitoring of the source prior to return to supply, though the RO recognizes that in an emergency situation this may not be possible. However, Concessionaire would be prudent to conduct some operational monitoring for key parameters prior to introducing such sources, dependent on the time since the source was last in use and any risks perceived in its water safety plan.

4. Sampling for existing sources

(a) This section outlines the sampling requirement for existing water sources in: (i) surface water and groundwater water under the influence of surface water (ii) groundwater source

(b) To ensure that the classification of the water source at the least as Class A for surface waters and Class AA for groundwater are maintained and preserved to their respective quality as source for domestic water supply and to prevent and abate pollution and contamination to protect public health, the water source in category (i) and (ii) while they are used as domestic water supply sources must be sampled for the test parameters at the frequency specified in Table 5 found in the Appendix.



Collection of Samples REGULATORY

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Collection of Samples

(a) Minimum quality requirements for the taking, handling, storage and analysis of samples taken for the regulatory monitoring of water supplies must be observed as specified in the 2007 PNSDW or in the latest edition of Standard Methods in the Examination of Water and Wastewater published by APPHA- AWWA. (b) Sample must be representative of the quality of water being sampled at the time of sampling and that the sample is not contaminated when being taken and that these must be kept in conditions that will ensure that the sample does not deteriorate in any significant way between sampling and the commencement of the analysis. (c) Concessionaire, or its sampling contractor if any, should produce a comprehensive sampling manual setting out the procedures and precautions to be adopted for each parameter or group of parameters. Sampling manual for microbiological parameters As a minimum, the sampling manual should include relevant information on the types of sample bottle, the preparation of sample bottles, sampling procedures and the transportation of samples. Sampling procedures specified in the Sampling Manual for Bacteriological Quality prescribed by the Metro Manila Drinking Water Quality Monitoring Committee (MMDWQCMC) shall be followed at the minimum.

Sampling manual for all other parameters

(a) The nature of parameters varies widely, and a range of sample containers, cleaning regimes, and methods of sample preservation and storage will be required. (b) As a minimum the sampling manual should specify:

(i) the types of bottles or containers, their closures and the purposes for which they are to be used;

(ii) where relevant, the cleaning procedure and shelf life for bottles, containers and closures

used for each parameter, including the amount and type of preservative to be added;



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(iii) the sampling procedure for each parameter, including the type of sample to be collected (e.g., first draw, flushed, stagnation) and the procedure to collecting samples for different parameters;

(iv) the order of sampling; (v) the conditions of storage and transport of samples and the maximum time that can

elapse before analysis should commence, for each parameter.

(c) Refer to the latest edition of Standard Methods in the Examination of Water and Wastewater published by APHA-AWWA for further general information on sampling procedures.



Training of Samplers REGULATORY

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Training of samplers

(a) In order to carry out sampling correctly it is essential that all samplers are fully trained and competent before they are allowed to work unsupervised. Concessionaire or its sampling contractor, if any, should produce a comprehensive sampler-training program to cover all aspects of sampling. (b) Once trained, all samplers’ performance should be monitored and subject to regular audit. Monitoring and audit procedures and criteria for satisfactory performance and policy on retraining should be documented. (c) A training record should be produced for each sampler detailing the training given, with dates and assessment of competence, results of any audits, any retraining or further training given and any re-assessment of competence. (d) All samples required to be analyzed as soon as possible after they have been taken, should be done by and under the supervision of a competent person using suitable equipment.



Analysis of Samples REGULATORY

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Analysis of Samples

(a) To demonstrate compliance with drinking water standards, only analytical methods specified in Table 1 shall be used for that parameter, and if the method is not included listed in the Table, Concessionaire shall get approval from DOH before it is applied, and MWSS RO to be properly notified by the Concessionaire of such request or approval of the DOH.

(b) The Regulatory Office must ensure that Concessionaire’s self monitoring is performed correctly to an acceptable standard and to this end encourages Concessionaire to use and adhere to quality management systems. Self- monitoring is supported by a number of tools that will give both the Regulator and Concessionaire confidence in the accuracy and reliability of data. Further, the RO recognizes that Concessionaire’s laboratory is a DOH- certified laboratory; however, Concessionaire is encouraged to use and adhere to quality management systems. Thus, certifications/ accreditation from internationally recognized oranizations such as ISO 17025 ensure that certain monitoring services and equipment are independently quality assured and therefore fit for purpose. (c) In cases Concessionaire needs to contract services of other laboratories because it has not developed yet its capability to conduct certain tests required in the 2007 PNSDW, it is necessary that analyses for contract out must be performed by certified laboratory, and that the Concessionaire shall be responsible to all test results submitted by the sub-contracted laboratory as to the reliability of the reported data.



Investigations REGULATORY

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Investigations

(a) Concessionaire is required; if it has reason to believe that the water supplied fails, or is likely to fail to meet the standards specified in the tables, to investigate the cause of that failure or likely failure. Similarly, the Concessionaire is required to investigate the cause of any failure or likely failure to meet the concentration.

(b) In this document, “failure” is defined as when the analysis of a sample taken as required by the Regulation exceeds a concentration or value specified for the parameters in the tables found in the Appendix.

(c) Concessionaire may have reason to believe that the water supplied is likely to fail in the following circumstances:

(i) there is evidence from the analysis of samples taken as required by the Regulation that

the trend in the concentration or value of a particular parameter is generally and steadily increasing or decreasing) towards the prescribed concentration or value and if that trend continues the water is likely to fail to meet the PCV in the future, say within 5 years;

(ii) no regulatory samples are in non-compliance with the PCV for a particular parameter

but there is evidence from the analysis of non-regulatory samples such as operational control samples or samples taken in response to incidents or consumer complaints that the PCV has been breached;

(iii) no regulatory samples have exceeded the PCV for a particular parameter but there is

evidence from the analysis of non-regulatory samples such as operational control samples or samples taken in response to incidents or consumer complaints that conc. or value is generally and steadily increasing (or decreasing) towards the PCV, and if that trend continues the water will fail to meet the PCV in the future, say within 5 years.

(d) Failures attributable to the domestic (local) distribution system

(i) Concessionaire is responsible to investigate whether a failure to achieve the maximum

allowable limit or value may be attributable to the domestic (local) distribution or its maintenance.




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(ii) Bacteriological parameters may be influenced by the condition of the domestic (local) distribution system and particularly the design and hygienic status of the consumer’s tap. Whether a failure to achieve the prescribed concentration for E. coli or fecal coliform occurs the water company should investigate the cause by taking further samples that may include:

- the original sample point - alternative consumer taps (only taps directly connected to the supply main) at

the same property and at adjacent or nearby properties - further sampling from related points in the distribution main

In case regular sampling point is found non-hygienic, the option is to take the nearest sampling point. In addition, the resident of the household with positive result will be advised regarding the cause of contamination.

(e) Additional information may be obtained by:

(i) Review of the outcome of analysis from other samples that may have been taken from

related water supply areas at a similar time to the original sample; (ii) Taking a sample prior to and after disinfection of the customer tap; (iii) Taking a swab sample from the surfaces of the tap that come in contact with the water

supply. The swab sample should be tested for the presence of Escherischia Coli.

(f) The outcome of the further analysis provides important information on the likelihood that the failure to achieve the prescribed concentration is attributable to the domestic (local) distribution system. There is strong indication that the failure is attributable to the domestic (local) distribution system in any of the following circumstances:

(i) the failure to meet the prescribed maximum allowable value recurs at the original

consumer‘s sample tap but all other samples meet the relevant prescribed concentrations;

(ii) the failure to meet the prescribed maximum allowable limit or value recurs in a sample

taken before disinfection of the original consumer’s sample tap but a sample taken




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following disinfection meets the relevant prescribed concentrations and all other samples meet the relevant prescribed concentrations;

(iii) the failure to meet the prescribed concentration does not recur at the original

consumer’s sample tap but Escherischia coli are recovered from a swab sample taken from the surfaces of the tap and all other samples meet the PCV;

(iv) the exceedence can be shown to be attributable to an upstream device e.g., softener,

filter or point of use treatment device or from some other unit connected to the domestic plumbing, e.g., washing machine or dishwasher.

(g) Where Concessionaire can demonstrate that failure to meet PCV for Escherischia coli were likely attributable to the domestic (local) distribution system then the individual results on the records/ report should be qualified by appropriate comments.

(h) The specification standards for taste and for odor are mandatory national standards and consequently failure to meet these standards must be investigated to determine the cause and extent of the failure. Most waters will exhibit no or very low taste and odor. Concessionaire should establish the baseline level of taste and odor in each distribution system, including where appropriate, the seasonal variations. All taste and odor customer complaint samples should receive a qualitative taste and odor test and where appropriate, additional tests should be undertaken to characterize the intensity and/or source of the taste or odor. As part of the investigation of a failure, Concessionaire should carry out appropriate investigation of a failure; Concessionaire should carry out appropriate investigation if the domestic plumbing is the cause.

(i) Failures to achieve the prescribed concentration for copper, lead and nickel at the consumer’s tap are commonly associated with the domestic distribution system as the water interacts with copper or lead pipes (or solders) and brass fittings which contain nickel. Failure for copper or lead may be due (in part) to water company pipes. Concessionaire should investigate the extent of these interactions by taking additional unflushed samples following defined periods of stagnation and from nearby properties. Visual checks should also be carried for any lead piping supplying the tap in the case of a lead failure.

(j) Failure of the prescribed concentration for copper may occur in houses with new copper plumbing or where a significant amount of copper pipe has been replaced. Following a failure to achieve the prescribed concentration for copper, the domestic distribution system should be inspected to ensure that it meets the requirements of standards for water fittings.




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(k) Unless the Concessionaire can demonstrate that the failure to achieve the prescribed concentration for copper or lead was due to exceptional circumstances and was therefore unlikely to recur, Concessionaire is required to modify or replace its pipes or fittings that have potential for contributing to copper or lead in the water supplied to the premises.



Notification to Consumers REGULATORY

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Notification to consumers

Notices to consumers

(a) Concessionaire, that has identified by its investigation that a failure is due to the domestic distribution system or maintenance of that system, is required to notify affected consumers in writing of the nature of the failure and to relay steps (if any) that the Concessionaire or health authorities consider it desirable for the consumers to take in the interests of their health. Concessionaire should provide appropriate technical advice and may refer consumers to their local health authority for advice on health matters.

(b) The notice from the Concessionaire should inform the consumer in simple layman’s terms the:

(i) parameter that has failed; (i) concentration or value of that parameter in the sample taken from the consumer’s

premises; (ii) prescribed concentration or standard value of that parameter; (iii) significance of the failure (if the concessionaire considers that advice on health matters

should be sought); and (iv) reason for the failure

(c) The notice must also inform the consumer of the steps he/she should take. The steps will depend on the nature of the parameter and the cause and extent of the failure, such as:

(i) failures of microbiological parameters – advise boiling water for drinking and food

preparation pending investigation of the problem – a plumbing inspection may assist in the investigation – where the failure is associated with an individual fitting advise repair or replacement of the pipework or fitting causing the problem

(ii) failures of the lead parameter (or other plumbing metals) – advise drawing off the water standing in the pipework and using for purposes other than drinking or food preparation – advise consideration of replacing the pipework within the premises contributing to the failure



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(iii) failures of other parameters are likely to be caused by ingress to the pipework within

the consumer’s premises (by permeation, leaking pipes or back siphonage) – advise where necessary and appropriate boiling water for drinking and food preparation or not to use water for drinking and food preparation – advise plumbing inspection – where the failure is associated with an individual fitting advise repair or replacement of the pipe work or fitting causing the problem.



Provision of Information REGULATORY

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Provision of information

In the KPI- BEMs Report Card, on a monthly basis the Concessionaire shall, not later than fifteen (15) days of the following month, supply the Regulatory Office information concerning the general water quality of the water supplied in the preceding month and other particulars found below -

(a) Numbers and names or identification in respect of each treatment works, each service reservoir and every other supply point (other than a treatment works including distribution area or where any regulatory sample was taken or collected. (b) The results of any analysis of samples taken in accordance with the requirements stated in the tables found in the in the Appendix. (c) In relation to those samples and each parameter

(i) the number and percentage of samples which contravened the prescribed concentration or value (PCV) or which did not meet the prescribed concentration or maximum allowable value or specification for that parameter

(ii) in respect of each parameter, the minimum, mean and maximum concentrations or values except for total coliform, fecal coliform, E. coli and heterotrophic plate count

(iii) a statement of the action taken by Concessionaire during the month to comply with any

failure to meet PCV or specification for that parameter. This should include other information relating to the event and its consequences as the RO may reasonably require.



KPI W4- Water Quality at Plant Outlet REGULATORY

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KEY PERFORMANCE INDICATOR (KPI) It has been discussed and agreed by MWSS RO and Concessionaire that all relevant information and data required found or specified below are to be reported in its Report Card on KPI- BEMs submitted to MWSS RO on a monthly basis. All other information and data, as mentioned in the early part of the said document, shall be included in its other Report Cards every quarter or semi-annual. Water Quality at Plant Outlet (W4)

(a) This key performance indicator intends to provide an overall measure of the effectiveness of the treatment process and the treatment plant’s day-to-day management regardless of the quality of the raw water used as source of the supply at anytime throughout the year.

(b) Under this KPI, MWCI is required to conduct two (2) frequencies of monitoring; check (high) frequency and audit (low) frequency, so that most the parameters required in the 2007 PNSDW are monitored at the most sensible and reasonable frequencies. (c) The check monitoring frequency ensures that sample for E. coli or fecal coliform, coliform bacteria, heterotrophic plate count, residual chlorine, turbidity, taste, odor, color, aluminum, iron, manganese, and pH are taken at the required frequency shown in Table 3.1 in the Appendix from the point at which water leaves each treatment works; and audit monitoring frequency ensures that sample for the parameters identified in Table 3.2 are taken similarly at the required frequency also from the point at which water leaves each treatment works. (d) The sampling point should be located so as to provide a representative sample of the water flowing into distribution. The sampling point must be downstream of all treatment processes including blending and any storage in final water storage reservoirs at the treatment works.

(e) Where the treatment stream within a works divides in such a way that a single final water compliance point will not be representative of all water leaving the works (i.e. there are different treatment streams which leave the works through different outlet mains), then more than one sampling point will be required. Where there is a possibility of differences in water quality within different outlet mains leaving the treatment works then separate sampling points are required for each different final water. Although on the same site, each treatment train is regarded as a separate water treatment works for the purposes of regulations.



KPI W4- Water Quality at Plant Outlet REGULATORY

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(f) All treatment works outlets should be fitted with metal sampling taps of a hygienic design which do not have attachments or inserts and which are made from materials complying with standards. Water should be supplied to the sampling tap through a sample line of a suitable material, which if plastic, complies similarly with standards. Sample lines should be kept as short as possible and the number of take-offs from the sample line should be kept to a minimum.

(g) All initial test results, conducted by either the RO or MWCI, counts into the indicator. Compliance for both the check and audit monitoring parameters, expressed as % Pass, shall be recorded monthly and annually, respectively, using the formula found below.

% Pass = Number of passing analyses irrespective of parameters x 100 Sum of analyses conducted irrespective of parameters



KPI W5- Water Quality in the Distribution REGULATORY

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KEY PERFORMANCE INDICATOR (KPI) It has been discussed and agreed by MWSS RO and Concessionaire that all relevant information and data required found or specified below are to be reported in its Report Card on KPI- BEMs submitted to MWSS RO on a monthly basis. All other information and data, as mentioned in the early part of the said document, shall be included in its other Report Cards every quarter or semi-annual.

Water Quality in the Distribution (W5)

(a) This indicator is intended to provide an overall indicator of the quality of water in the distribution as it arrives at the point of delivery to the consumer. Therefore, it is imperative that distribution-system sampling should always be performed at points representative of conditions within the system taking into considerations in determining the number and location of sampling points are that they should be

i. Representative of each different source of entering the system; and

ii. Representative of conditions within the system, such as dead ends, loops, storage facilities,

and pressure zones.

(b) Parameters under this indicator are the total coliform, turbidity and color that are sampled and analyze at the minimum depending on the number of population served by the system. Table 2 in the Appendix sets the required number of samples to be taken and analyzed on a monthly basis.

(c) In the 2003 – 2007 KPI- BEMs, only the Total coliform parameter was considered under this KPI. Due to several complaints from the consumers during the public consultations conducted during the 2008 Rate Rebasing Exercise of colored water specifically in the supplied water sourced from deepwell, it is necessary to that color and turbidity shall be sampled at the same time sample for coliform is taken at the consumers’ tap but this shall be applied only in the distribution areas served by the water supplied from water sources found to contain high level of either manganese, iron or THMs that may cause the discoloration in the water supply. (d) In the case where the water supply in a distribution area is served with both surface water and groundwater found to contain high level of either manganese, iron or THMs that cause discoloration in the water supply, samples for color and turbidity shall also be taken at the same time sample for coliform is collected.



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(e) Compliance for total coliform shall be at the minimum 95%. All initial failure on samples either taken by the RO or MWCI counts into the indicator. Results of resampling in response to individual failures are considered in this indicator. (f) Compliance on color and turbidity, combined, shall be computed similar to total coliform where the required 95% minimum is applied. This means that results on both turbidity and color are within the corresponding PCV or MAL before compliance is considered met in any sampling point. Compliance for each applicable supply zone shall be recorded respectively. (g) Computation for compliance under this KPI is as follows –

% compliance = No. of samples < max. allowable value for coliform x 100 For coliforms Total samples tested for coliform

% compliance = No. of samples < PCV or MAL for turbidity & color, combined x 100 For turbidity Total number of samples tested for turbidity & color & color *

* - To be determined only in supply zone required for turbidity and color monitoring.



KPI W6- Water Supply Sampling REGULATORY

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KEY PERFORMANCE INDICATOR (KPI) It has been discussed and agreed by MWSS RO and Concessionaire that all relevant information and data required found or specified below are to be reported in its Report Card on KPI- BEMs submitted to MWSS RO on a monthly basis. All other information and data, as mentioned in the early part of the said document, shall be included in its other Report Cards every quarter or semi-annual.

Water Supply Sampling (W6)

(a) This indicator gives a measure on the achievement of the Concessionaire to comply with the sampling frequency required at each treatment plant it operates and in the distribution system including all service reservoirs as set in Tables 2, 3 and 4 in the Appendix. In totality, this will be the total number of analyses conducted by Concessionaire the parameters required for monitoring, for each water treatment works, service reservoir or pumping station, and at the consumers’ tap in the distribution system.

(b) Percent (%) achievement shall be reported monthly on the parameters identified for high frequency monitoring while both the check and audit monitoring parameters shall be reported in the annual reports. Concessionaire is required to meet the 100% Achievement.

(c) Tables 2, 3 and 4 list all the required parameters including the required annual sampling frequency at WTWs, Service reservoirs and at the consumers’ taps in the distribution system.

(d) Compliance shall be reported in terms of % Achievement and shall be reported annually.

% Achievement = No. of samples tested against Tables 3 x 100

at WTWs Required no. of samples set in Table 3

% Achievement = No. of samples tested against Tables 2 x 100 at Distbn. system Required no. of samples set in Table 2

% Achievement = No. of samples tested against Table 4 x 100 at SRs/ PSs Required no. of samples set in Table 4


No. of Pages: (including this page) Revision No. : 0 Date: 04 December 2009

WATER SUPPLY- Appendix

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Senior Director, Operations Group Manila Water Company, Inc.




Appendix



Table 1. The 2007 PNSDW Requirements

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Table 1. The 2007 Philippine National Standards for Drinking Water

Item

Substance & parameter subject to monitoring

Prescribed conc. value (PCV) or

max. allowable value (MAL)

Method of determination

1.1 Microbiological requirement

1 Coliform bacteria

<1.1 MPN/100ml Multiple tube fermentation technique (MTFT)

Absent Chromogenic substrate test (Presence- absence test)

< 1 colony/100 ml Membrane filter technique (MFT)

2 Fecal coliform

<1.1 MPN/100ml Multiple tube fermentation technique (MTFT)

Absent Chromogenic substrate test (Presence- absence test)

< 1 colonies/100ml Membrane filter technique (MFT)

3 Heterotrophic plate count (HPC) < 500 CFU/ml

Pour plate Spread plate Membrane filter technique (MFT)

1.2 Inorganic chemical constituents with health significance

4 antimony 0.02 mg/l

Flame atomic absorption spectrometry(FAAS) Electrothermal atomic absorption (EAAS) Inductively coupled plasma-mass spectrometry (ICP-MS)

5 arsenic 0.05 mg/l

ICP-MS Hydride generation AAS Silver diethyldithiocarbamate method Electrothermal atomic absorption (EAAS) Graphite furnace AAS

6 barium 0.7 mg/l

ICP- MS FAAS EAAS Inductively coupled plasma (ICP)

7 boron 0.5 mg/l ICP-MS Inductively coupled plasma-atomic emission spectrometry (ICP-AES)

8 cadmium 0.003 mg/l ICP- MS FAAS




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Table 1. The 2007 Philippine National Standards for Drinking Water, cont’d.

Item



max. allovable value (MAL)


1.2 Inorganic chemical constituents with health significance, cont’d.

9 total chromium 0.05 mg/l

FAAS EAAS Inductively coupled plasma (ICP) ICP- MS

10 total cyanide 0.07 mg/l Titrimeteric Colorimetric CN selective electrode

11 fluoride 1 mg/l

Ion chromatography (IC) Ion selective electrode SPADNS colorimetric Complexone method

12 lead 0.01 mg/l

FAAS EAAS ICP- MS Anodic stripping voltammetry Dithizone

13 total mercury 0.001 mg/l Cold vapor atomic absorption spectrometry ICP- MS

14 nickel 0.02 mg/l

ICP- MS Electrothermal atomic absorption (EAAS) ICP FAAS

15 nitrate 50 mg/l Cadmium reduction method 16 nitrite 3 mg/l IC

Capillary ion electrophoresis

Flow injection analysis




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Tem





1.2 Inorganic chemical constituents with health significance, cont’d.

17 selenium 0.01 mg/l

AAS with hydride generation colorimetric, fluorometric EAAS ICP ICP- MS

1.3 Organic chemical constituents from industrial pollution (with health significance)

18 benzene 0.01 mg/l Gas chromatography- photoionization detector (GC-PID) GC- MS

19 carbon tetrachloride 0.004 mg/l

Gas chromatography-photoionization detector (GC- PID) GC- MS GC-electrolytic conductivity detector (GC-ELCD)

20 1,2-dichlorobenzene 1 mg/l GC- PID

21 1,4-dichlorobenzene 0.3 mg/l GC-ELCD GC- MS

22 1,2- dichloroethane 0.03 mg/l GC-PID GC-ELCD GC- MS

23 1,1- dichloroethene 0.03 mg/l GC- PID GC-ELCD GC- MS

24 1,2- dichloroethene 0.05 mg/l GC- PID GC-ELCD GC- MS

25 dichloromethane 0.02 mg/l GC- MS

26 Di (2-ethylhexyl phthalate 0.008 mg/l GC- MS

27 Edetic acid (EDTA) 0.6 mg/l Potentiometric stripping analysis




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Item





28 ethylbenzene 0.3 mg/l GC-PID GC- MS

29 nitrilotriacetic acid (NTA) 0.2 mg/l GC with nitrogen- specific detector

30 PAHs 0.0007 mg/l GC- MS Reverse- phase HPLC with fluorescence detector

31 styrene 0.02 mg/l GC- PID GC- MS

32 tetrachloroethene 0.04 mg/l GC- ECD 33 trichloroethene 0.07 mg/l GC- MS

34 tolouene 0.7 mg/l GC- FID GC- MS

35 vinyl chloride 0.0003 mg/l GC- ECD GC- FID with MS for confirmation

36 xylene 0.5 mg/l GC- MS GC- FID

1.4 Organic chemical constituents (Pesticides) 37 aldrin + dieldrin 0.00003 mg/l GC- ECD 38 atrazine 0.002 mg/l GC- MS

39 carbofuran 0.007 mg/l GC- nitrogen- phosphorus detector Reverse- phase HPLC with fluorescence detector

40 chlordane 0.0002 mg/ GC- ECD GC- MS

41 DDT 0.001 mg/l GC- ECD GC- MS

42 1,2 dibromo-3-chloropropane (DBCP) 0.001 mg/l

GC- ECD GC- MS

43 2,4-dichlorophenoxyacetic acid (2,4-D)

0.03 mg/l GC- ECD

GC- MS




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Item





1.4 Organic chemical constituents (Pesticides)

44 endrin 0.0006 mg/l GC- ECD

GC- MS

45 1,2 dibromoethane 0.0004 mg/l

GC-MS

GC- ELCD

GC- PID

46 Heptachlor & heptachl epoxide 0.00003 mg/l

GC- ECD

GC- MS

47 lindane 0.002 mg/l GC- ECD

GC- MS

48 MCPA 0.002 mg/l GC- ECD

GC- MS

49 pendimethalin 0.02 mg/l GC- MS

50 pentachlorophenol (PCP) 0.09 mg/l

GC- ECD GC- FID GC- MS

1.5 Physical and chemical quality for acceptability aspects

51 taste no obj taste Sensory evaluation technique

52 Odor No obj odor Sensory evaluation technique

53 color, apparent 10 color units Visual comparison

Colorimetric

54 turbidity 5 NTU Turbidimetry

55 aluminum 0.2 mg/l

FAAS EAAS ICP Colorimetric

56 chloride 250 mg/l Argentometric method IC




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Item





1.5 Physical and chemical quality for acceptability aspects, contd.

57 copper 1 mg/l

FAAS EAAS ICP Neocuproine method Bathocuproine method

58 hardness 300 mg/l as CaCO3

FAAS EAAS ICP Colorimetric method

59 Hydrogen sulfide 0.05 mg/l Methylene blue method Iodometric method

60 Iron 1 mg/l

Phenanthroline AAS ICP Colorimetric method

61 manganese 0.4 mg/l

Persulfate method AAS ICP ICP- MS

62 pH 6.5- 8.5 Electometric method

63 sodium 200 mg/l AAS (flame absorption mode) ICP- MS Flame photometry

64 sulfate 250 mg/l Turbidimetric method IC Gravimetric method

65 Total dissolved solids 500 mg/l Gravimetric method (dried at 180 C)




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Item



max. allovable value (MAL


1.5 Physical and chemical quality for acceptability aspects, contd.

66 Zinc 5 mg/l FAAS

ICP ICP- MS

1.6 Chemicals used in treatment and disinfection & disinfectant by-products a. Contaminants from treatment chemicals

67 Acrylamide 0.0005 mg/l GC- ELCD HPLC with UV detection

68 Epichlorhydrin 0.0004 mg/l GC- ECD GC- MS GC- FID

b. Disinfection chemicals

69 Chlorine residual 0.3 - 1.5 mg/l Iodometric method Amperometric titration DPD colorimetric method

c. Disinfection Byproduct 70 Bromate 0.01 mg/l IC

71 Chlorite 0.7 mg/l IC with suppressed conductivity detection for chlorate

72 Chlorate 0.7 mg/l IC with suppressed conductivity detection for chlorate

73 Trichloroacetaldehyde 0.01 mg/l GC- ECD GC- MS

74 Dibromoacetonitrile 0.07 mg/l GC- ECD

75 Dichloroacetic acid 0.05 mg/l GC- ECD GC- MS

76 Dichloroacetonitrile 0.02 mg/l GC- ECD 77 formaldehyde 0.9 mg/l GC- ECD




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Item



max. allowable value (MAL


c. Disinfection Byproduct

78 monochloroacetate 0.02 mg/l GC- ECD GC- MS 79 trichloroacetate 0.2 mg/l

80 2,4,6-trichlorophenol 0.2 mg/l

Trihalomethanes

81 bromoform 0.1 mg/l

GC- ECD GC- MS

82 dibromochloromethane 0.1 mg/l

83 bromodichloromethane 0.06 mg/l

84 chloroform 0.2 mg/l

1.7 Radiological 85 gross alpha 0.1 (excl radon) Bq/l

Refer to PNSDW 86 gross beta 1 Bq/l 87 radon 11 (MCL) Bq/l



Table 2. Water Quality in the Distribution System

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Table 2. Water Quality in the Distribution System (Consumers’ Taps)

Item


Prescribed conc. Value

(PCV) or Max.

alowable value (MAV)

CONSUMERS' TAP (T)

frequency

min. sampling frequency Population (7)

<4,999 5,000 - 99,999 > 100,000

2.1 Check monitoring parameters

2.1a Microbiological requirement

1 Coliform bacteria (1) <1.1MPN/100ml Monthly 1 1 for every 5,000 20 + 1 per 10,000

2 Fecal coliform <1.1MPN/100ml Monthly 1 1 for every 5,000 20 + 1 per 10,000

Escherichia coli

3 HPC (1) (2) No abnormal change Monthly 1 1 for every 5,000 20 + 1 per 10,000

2.1b Disinfection chemical

4 Res. Chlorine (1) 0.3 to 1.5 mg/l monthly 1 1 for every 5,000 20 + 1 per 10,000

2.1c Acceptability

5 color, apparent (3) 10 color units annual (a) 1 1 for every 5,000 20 + 1 per 10,000

monthly (b) 1 1 for every 5,000 20 + 1 per 10,000

6 turbidity (3) 5 NTU annual (a) 1 1 for every 5,000 20 + 1 per 10,000

monthly (b) 1 1 for every 5,000 20 + 1 per 10,000

7 pH 6.5- 8.5 annual 2 4 for every 5,000 10 for every 100,000

8 taste no obj taste annual 2 4 for every 5,000 10 for every 100,000

9 odor no obj odor annual 2 4 for every 5,000 10 for every 100,000

10 aluminum (4) 0.2 mg/l Check-annual 2 4 for every 5,000 10 for every 100,000

Audit- annual 1 1 for every 12,500 5 for every 100,000

11 iron (4)(5) 1 mg/l Check-annual 2 4 for every 5,000 10 for every 100,000


12 manganese (5) 0.4 mg/l Check-annual 2 4 for every 5,000 10 for every 100,000


2.2 Audit monitoring parameters

2.2a Acceptability

13 copper 1 mg/l annual 1 1 for every 12,500 2 for every 100,000

14 Zinc 5 mg/l annual 1 1 for every 12,500 2 for every 100,000




REGULATORY OFFICE




FRANK BEAUMONT





Table 2. Water Quality in the Distribution System, cont’d.

Item



(PCV) or Max. alowable

value (MAV)

CONSUMERS' TAP (T)

frequency

min. sampling frequency Population (7)

<4,999 5,000 - 99,999 > 100,000

2.2b Inorganic chemical constituents with health significance, cont’d.

15 antimony 0.02 mg/l annual 1 1 for every 12,500 2 for every 100,000

16 cadmium 0.003 mg/l annual 1 1 for every 12,500 2 for every 100,000

17 chromium, total 0.05 mg/l annual 1 1 for every 12,500 2 for every 100,000

18 lead 0.01 mg/l annual 1 1 for every 12,500 2 for every 100,000

19 nickel 0.02 mg/l annual 1 1 for every 12,500 2 for every 100,000

2.2c Organic chemical constituents from industrial pollution (w/ health significance)

20 benzene 0.01 mg/l annual 1 1 for every 12,500 2 per 500,000

21 ethylbenzene 0.3 mg/l annual 1 1 for every 12,500 2 per 500,000

22 PAHs (6) 0.0007 mg/l annual 1 1 for every 12,500 2 per 500,000

23 benzo-a-pyrene 0.01 µg/l annual 1 1 for every 12,500 2 per 500,000

24 tolouene 0.7 mg/l annual 1 1 for every 12,500 2 per 500,000

25 xylene 0.5 mg/l annual 1 1 for every 12,500 2 per 500,000 Legend (1) - Indicator parameter

(2) -The value of monitoring is to establish data w/c characterises a water supply in terms of seasonal and longer term changes. The onset of significant change in colony count results against the normal range established for that water supply is much more significant than the absolute values from the individual results.

(3) - monitoring frequency for coliform is applied in areas served with either surface or groundwater with high level of iron or manganese (4) - check monitoring is required when used as a flocculant or where the water originates from, or is influenced by, surface water (a) applicable only in water source low in iron and/or manganese (b) for water sources with high level of iron and/ or manganese

(5) - check monitoring is required where water source contains manganese and/or iron level higher than the standard or where discoloration is observed in the water in its supply zone.

(6) - the specified compounds are benzo (b) fluoranthene, benzo(k) fluoranthene, benzo (g,h,i) perylene and indenol (1,2,3-cd) perylene.




REGULATORY OFFICE




FRANK BEAUMONT





(7) – Determination/ updating on the required number of Regulatory Sampling Points shall be conducted semi-annual preferably during December and May of each year; implementation of which shall be on the succeeding month. Note: Total coliform and fecal coliform are required in the initial sampling; however, fecal coliform test can be

allowed optional in the initial sampling only when the test method used is Membrane Filtration Technique (MFT), provided further that fecal coliform test must be analyzed in any repeat sample even when MFT method is used for the analysis.


Page: 1 of 3 Revision No. : 1 Date: 10 June 2011

Table 2. Water Quality in the Distribution System REGULATORY

OFFICE


JORGE C. MATEO Manager, Water Quality

Control MWSS Regulatory Office

GEODINO V. CARPIO

Group Director, Operations Manila Water Company, Inc.




Table 2. Water Quality in the Distribution System (Consumers’ Taps)

Item



(PCV) or Max.


CONSUMERS' TAP (T)

ANNUAL min. sampling frequency Population (1)

Population Reduced freq range Standard freq range

2.1 Check monitoring parameters

2.1a Microbiological requirement

1 Coliform bacteria <1.1MPN/100ml <4,999 x 12

5,000 – 99,999 x 12 per 5,000

> 100,000 x 240 +12 per 10,000

2 Fecal coliform <1.1MPN/100ml <4,999 Test only in coliform + 12

5,000 – 99,999 Test only in coliform + 12 per 5,000

> 100,000 Test only in coliform + 240 +12 per 10,000

3 HPC (2) No abnormal change

<4,999 40% of std freq range 12

5,000 – 99,999 40% of std freq range 12 per 5,000

> 100,000 40% of std freq range 240 +12 per 10,000

2.1b Disinfection chemical

4 Res. Chlorine 0.3 to 1.5 mg/l <4,999 x 12

5,000 – 99,999 x 12 per 5,000

> 100,000 x 240 +12 per 10,000

2.1c Acceptability

5 color, apparent (check) (3) 10 color units <4,999 50% of std freq range 12

6 turbidity (check) (3) 5 NTU 5,000 – 99,999 50% of std freq range 12 per 5,000

> 100,000 50% of std freq range 240 +12 per 10,000

Color (apparent) (audit) 10 color units <4,999 x 1

Turbidity (audit) 5 NTU 5,000 – 99,999 x 1 per 5,000

> 100,000 x 20 +1 per 10,000

7 pH 6.5- 8.5 <4,999 x 2

8 taste no obj taste 5,000 – 99,999 50% of std freq range (4) 4 per 5,000

9 odor no obj odor > 100,000 50% of std freq range (4) 10 per 100,000

10 aluminum (check) (4) 0.2 mg/l <4,999 x 2

11 Iron (check) (4)(5) 1 mg/l 5,000 – 99,999 50% of std freq range 4 per 5,000




OFFICE




GEODINO V. CARPIO





Item



(PCV) or Max.


CONSUMERS' TAP (T)

ANNUAL min. sampling frequency Population (1)

Population Reduced freq range Standard freq range

12 manganese (check)(5) 0.4 mg/l > 100,000 50% of std freq range 10 per 100,000

aluminium (audit) 0.2 mg/l <4,999 x 1

Iron (audit) 1 mg/l 5,000 – 99,999 x 1 per 12,500

manganese (audit) 0.4 mg/l > 100,000 x 5 per 100,000

13 copper 1 mg/l <4,999 x 1

14 zinc 5 mg/l 5,000 – 99,999 50% of std freq range (4) 1 per 12,500

> 100,000 50% of std freq range (4) 2 per 100,000

15 hardness(6) > 40 mg/l <4,999 x 2

16 Total dissolved solids (6) >100 mg/l 5,000 – 99,999 x 4 per 5,000

> 100,000 x 10 per 100,000

2.2 Audit monitoring parameters

2.2a Inorganic chemical constituents with health significance

15 antimony 0.02 mg/l 16 cadmium 0.003 mg/l <4,999 x 1

17 chromium, total 0.05 mg/l 5,000 – 99,999 50% of std freq range (4) 1 per 12,500

18 lead 0.01 mg/l > 100,000 50% of std freq range (4) 2 per 100,000 19 nickel 0.02 mg/l

2.2b Organic chemical constituents from industrial pollution (w/ health significance)

20 benzene 0.01 mg/l 21 ethylbenzene 0.3 mg/l <4,999 x 1

22 PAHs (7) 0.0007 mg/l 5,000 – 99,999 50% of std freq range 1 per 12,500

24 tolouene 0.7 mg/l > 100,000 50% of std freq range 2 per 500,000 25 xylene 0.5 mg/l

Legend (1) based on data reported end of December of the preceding year.

(2) the value of monitoring is to establish data w/c characterises a water supply in terms of seasonal

and longer term changes. The onset of significant change in colony count results against the normal range established for that water supply is much more significant than the absolute values from the individual results.




OFFICE




GEODINO V. CARPIO





(3) monitoring frequency for coliform is applied in areas served with either surface or groundwater with

high level of iron or manganese

(4) check monitoring is required when used as flocculants or where the water originates from, or is influenced by, surface water

(5) check monitoring is required where water source contains manganese and/or iron level higher than the standard or where discoloration is observed in the water in its supply zone.

(6) monitoring is required only in water supply that undergone reverse osmosis or water softening

treatment process. PCV specified in the Table serves as a guideline value only; enforcement deferred pending Rate Rebasing 2012

(7) the specified compounds are benzo (a) pyrene, benzo (b) fluoranthene, benzo(k) fluoranthene,

benzo (g,h,i) perylene and indenol (1,2,3-cd) perylene. The PCV is the sum of the test result of the specified parameters



Table 3. Water Quality at the Treatment Works

REGULATORY OFFICE




FRANK BEAUMONT





Table 3.1. Water Quality at the Treatment Works- Check monitoring

Item


Prescribed conc value

(PCV) or max

allowable value (MAV)

ALL WATERWORKS (WTWs) where water originates from either surfacewater or groundwater

frequency

Annual sampling frequency

million liters/day

0.020-1.999 2 -5.999 6-11.999 > 12

3.1a Microbiological 1 Coliform bacteria <1.1MPN/100ml annual 52 104 208 365

2 Fecal coliform <1.1MPN/100ml annual 52 104 208 365

Escherichia coli

3 HPC(1) (2) No abnormal change annual 52 104 208 365

3.1b Disinfection chemicals

4 Res. Chlorine (1) 0.3 – 1.5 mg/l annual 52 104 208 365

3.1c Acceptability

5 color, apparent 10 color units annual 52 104 208 365

6 Turbidity < 5 NTU annual 52 104 208 365

7 pH 6.5- 8.5 annual 52 104 208 365

8 Taste no obj taste annual 52 104 208 365

9 Odor no obj odor annual 52 104 208 365

10 aluminum (3) 0.2 mg/l Check-annual 52 104 208 365

Audit- annual 4 8 12 24

11 iron (3)(4) 1 mg/l Check-annual 52 104 208 365


12 manganese (4) 0.4 mg/l Check-annual 52 104 208 365


13 hardness 300 mg/l as CaCO3 annual 52 104 208 365

NOTES: (1) In WTWs applied with conventional and/ or reverse osmosis treatment process, daily sampling for total & fecal

coliform, HPC, turbidity, chloride and TDS is a requirement. Monitoring requirement for aluminum, iron and manganese also applies.

(2) The San Rafael WTWs shall be handled differently due to the absence of the necessary approval or permit from the agencies as specified in its ECC recently issued in June 2008, the approval from the DOH in particular. Daily sampling on the check parameters is also required including chloride, sodium, sulfate and TDS which are listed in the Audit parameters.




REGULATORY OFFICE




FRANK BEAUMONT





Table 3.2. Water Quality at the Treatment Works- Audit monitoring

Item


MAV or PCV

(mg/l unless

specified)

ALL WATERWORKS (WTW) where water originates from either surfacewater or groundwater

frequency


million liters/day 0.020-0.999

1.000- 49.999

50- 89.999

90- 299.999 > 300

3.2a Acceptability 14 chloride (1) 250 mg/l annual 4 12 12 12 12

15 sodium 200 mg/l annual 4 12 12 12 12

16 sulfate (1) 250 mg/l annual 4 12 12 12 12

17 TDS 500 mg/l annual 4 12 12 12 12

3.2b Inorganic chemicals with health significance 18 antimony 0.02 mg/l annual 1 2 2 2 2

19 arsenic 0.05 mg/l annual 1 2 2 2 2

20 boron 0.5 mg/l annual 1 2 2 2 2

21 cadmium 0.003 mg/l annual 1 2 2 2 2

22 chromium, total 0.05 mg/l annual 1 2 2 2 2

23 cyanide, total 0.07 mg/l annual 1 2 2 2 2

24 fluoride 1 mg/l annual 1 2 2 2 2

25 lead 0.01 mg/l annual 1 2 2 2 2

26 mercury, total 0.001 mg/l annual 1 2 2 2 2

27 nickel 0.02 mg/l annual 1 2 2 2 2

28 nitrate 50 mg/l annual 1 2 2 2 2

29 nitrite 3 mg/l annual 1 2 2 2 2

30 selenium 0.01 mg/l annual 1 2 2 2 2

3.2c Organic chemical constituents from industrial pollution (w/ health significance) 31 benzene 0.01 mg/l annual 1 2 2 2 2

32 1,2- dichloroethane 0.03 mg/l annual 1 2 2 2 2

33 1,2- dichloroethene 0.05 mg/l annual 1 2 2 2 2

34 ethylbenzene 0.3 mg/l annual 1 2 2 2 2

35 tetrachloroethane 0.04 mg/l annual 1 2 2 2 2

36 Trichloroethane 0.7 mg/l annual 1 2 2 2 2

37 tolouene 0.07 mg/l annual 1 2 2 2 2

38 xylene 0.5 mg/l annual 1 2 2 2 2




REGULATORY OFFICE




FRANK BEAUMONT





Table 3.2. Water Quality at the Treatment Works- Audit monitoring, cont’d.

Item


MAV or PCV

(mg/l unless

specified)

ALL WATERWORKS (WTW) where water originates from either surfacewater or groundwater

frequency


million liters/day 0.020-0.999

1.000- 49.999

50- 89.999

90- 299.999 > 300

3.2d Organic chemical constituents – Pesticides

39 Aldrin & dieldrin 0.03 µg/l annual 1 2 2 2 2

40 heptachlor and heptachlor epoxide

0.03 µg/l annual 1 2 2 2 2

41 Other individual pesticides (6) 0.10 µg/l annual 1 2 2 2 2

42 Pesticides: Total (7) 0.50 µg/l annual 1 2 2 2 2 3.2e Chemicals used in treatment, disinfection and disinfectant by-products

43 Bromate 0.01 mg/l annual 1 2 2 2 2

44 bromoform 0.1 mg/l annual 1 2 2 2 2

45 dibromochloromethane 0.1 mg/l annual 1 2 2 2 2

46 bromodichloromethane 0.06 mg/l annual 1 2 2 2 2

47 chloroform 0.2 mg/l annual 1 2 2 2 2

3.2f Radiological

48 gross alpha activity 0.1 Bq/l

Initial-1st year 4

Standard 1 every 3 years( 9)

Reduced 1 every 6 years (10)

49 gross beta activity 1 Bq/l

Initial-1st year 4



50 radon 11 Bq/l (Max level)

Initial-1st year 4






REGULATORY OFFICE




FRANK BEAUMONT





Legend (1) - Indicator parameter;

(2) -The value of monitoring is to establish data w/c characterises a water supply in terms of seasonal and longer term changes. The onset of significant change in colony count results against the normal range established for that water supply is much more significant than the absolute values from the individual results. (3) - check monitoring is required when used as a flocculant or where the water originates from, or is influenced by, surface water

(4) - check monitoring is required where water source contains manganese and/or iron level higher than the standard or where discoloration is observed in the water in its supply zone.

(5) - the specified compounds are benzo (b) fluoranthene, benzo(k) fluoranthene, benzo (g,h,i) perylene and indenol (1,2,3-cd) perylene. (6) - means to each individual pesticides, including any relevant metabolite, degradation and reaction product. (7) - the sum of the concentrations of the individual pesticides detected and qualtified in the monitoring procedure

(9)- If running average from four consecutive quarterly samples > 50% of the Reference level

(10) - If initial average is < 50% of the Reference level




REGULATORY OFFICE




GEODINO V. CARPIO





Table 3.1. Water Quality at the Treatment Works

Item

Substance & parameter subject to

monitoring

Prescribed conc value (PCV) or max allowable

value (MAV)

ALL WATERWORKS (WTWs) where water originates from either surface water or

groundwater Annual minimum sampling frequency

Ave. daily output, m3/day

Reduced sampling frequency

Standard sampling frequency

3.1a Microbiological

1 Coliform bacteria <1.1MPN/100ml 20- 1,999 x 52

2,000- 5,999 x 104

6,000-,11,999 x 208

> 12,000 x 365

2 Fecal coliform <1.1MPN/100ml 20- 1,999 26 52 3 HPC (1) No abnormal

change 2,000- 5,999 52 104

6,000-,11,999 104 208

> 12,000 180 365

3.1b Disinfection chemicals

4 Res. Chlorine 0.3 – 1.5 mg/l 20- 1,999 26 52

2,000- 5,999 52 104

6,000-,11,999 104 208

> 12,000 180 365

3.1c Acceptability

5 pH 6.5- 8.5 20- 1,999 26 52 6 Taste no obj odor 2,000- 5,999 52 104 7 odor no obj odor 6,000-,11,999 104 208

> 12,000 180 365 8 color, apparent

(check)(2) 10 color units

20- 1,999 26 52 9 Turbidity (check)(2) < 5 NTU 2,000- 5,999 52 104

6,000-,11,999 104 208

> 12,000 180 365

color, apparent (audit) 10 color units 20- 1,999 x 4

Turbidity (audit) < 5 NTU 2,000- 5,999 x 8

6,000-,11,999 x 12

> 12,000 x 24

10 aluminum (check)(3) 0.2 mg/l 20- 1,999 26 52 11 iron (check) (2)(3) 1 mg/l 2,000- 5,999 52 104 12 manganese (check)(2) 0.4 mg/l 6,000-,11,999 104 208

> 12,000 180 365




REGULATORY OFFICE




GEODINO V. CARPIO






Item


monitoring


value (MAV)






aluminum (audit) 0.2 mg/l 20- 1,999 x 4

iron (audit) 1 mg/l 2,000- 5,999 x 8

manganese (audit) 0.4 mg/l 6,000-,11,999 x 12

> 12,000 x 24

13 chloride 250 mg/l 20- 999 x 4 14 hardness (audit) 300 mg/l as CaCO3 1,000- 49,999 x 12 15 sodium 200 mg/l 50,000-,89,999 x 12 16 sulfate 250 mg/l 90,000- 299,999 x 12 17 total dissolved solids

(audit) 500 mg/l > 300,000 x 12

hardness (check)(4) > 40 mg/l as CaCo3 20- 1,999 26 52 Total dissolved solids

(check)(4) > 100 mg/l 2,000- 5,999 52 104

6,000-,11,999 104 208

> 12,000 180 365

3.2b Inorganic chemicals with health significance 18 antimony 0.02 mg/l 19 arsenic 0.05 mg/l 20 boron 0.5 mg/l 21 cadmium 0.003 mg/l 20- 999 x 1 22 chromium, total 0.05 mg/l 1,000- 49,999 x 2 23 cyanide, total 0.07 mg/l 50,000-,89,999 x 2 24 fluoride 1 mg/l 90,000- 299,999 x 2 25 lead 0.01 mg/l > 300,000 x 2 26 mercury, total 0.001 mg/l 27 nickel 0.02 mg/l 28 nitrate 50 mg/l 29 nitrite 3 mg/l 30 selenium 0.01 mg/l 3.2c Organic chemical constituents from industrial pollution (w/ health significance) 31 benzene 0.01 mg/l 32 1,2- dichloroethane 0.03 mg/l 20- 999 x 1 33 1,2- dichloroethene 0.05 mg/l 1,000- 49,999 x 2




REGULATORY OFFICE




GEODINO V. CARPIO






Item


monitoring


value (MAV)






34 ethylbenzene 0.3 mg/l 50,000-,89,999 x 2 35 tetrachloroethane 0.04 mg/l 90,000- 299,999 x 2 36 Trichloroethane 0.7 mg/l > 300,000 x 2 37 tolouene 0.07 mg/l 38 xylene 0.5 mg/l 3.2d Organic chemical constituents – Pesticides

39 Aldrin & dieldrin 0.03 µg/l

Refer to Guide Document provision under Section Monitoring: Water Supply Zone paragraph 9.(1).

40 heptachlor and heptachlor epoxide 0.03 µg/l

41 Other individual pesticides (5)

0.10 µg/l

42 Pesticides: Total (6) 0.50 µg/l

3.2e Chemicals used in treatment, disinfection and disinfectant by-products

43 Bromate 0.01 mg/l 20- 999 x 1 44 bromoform 0.1 mg/l 1,000- 49,999 x 2 45 dibromochloromethane 0.1 mg/l 50,000-,89,999 x 2 46 bromodichloromethane 0.06 mg/l 90,000- 299,999 x 2 47 chloroform 0.2 mg/l >300,000 x 2

3.2f Radiological

48 gross alpha activity 0.1 Bq/l Refer to Guide Document provision under Section Monitoring: Water Supply Zone paragraph 9.(4). 49 gross beta activity 1 Bq/l

50 radon 11 Bq/l (Max level)

Legend:

(1) the value of monitoring is to establish data w/c characterises a water supply in terms of seasonal

and longer term changes. The onset of significant change in colony count results against the normal range established for that water supply is much more significant than the absolute values from the individual results.

(2) check monitoring is required where water source contains manganese and/or iron level and/or where discoloration is observed in the water in its supply zone.

(3) check monitoring is required when used as a flocculants or where the water originates from, or is

influenced by, surface water




REGULATORY OFFICE




GEODINO V. CARPIO





(4) check monitoring is required only in water supply that undergone reverse osmosis or water softening treatment process. PCV specified in the Table serves only as a guideline value; enforcement of the PCV deferred pending Rate Rebasing 2012

(5) means to each individual pesticides, including any relevant metabolite, degradation and reaction product.

(6) the sum of the concentrations of the individual pesticides detected and qualified in the

monitoring procedure



Table 4. Water Quality at the Service Reservoir

REGULATORY OFFICE




FRANK BEAUMONT





Table 4. Water Quality at the Service Reservoir

Item


Prescribed conc. Value (PCV) or

max allowable value (MAV)

SERVICE RESERVOIR

Frequency Annual sampling frequency

4.a Microbiological 1 Coliform bacteria (1) <1.1MPN/100ml Annual 52

2 Fecal coliform <1.1MPN/100ml Annual 52

Escherichia coli

3 HPC (1) (2) No abnormal change Annual 52

4.b Disinfection chemicals

4 Res. Chlorine (1) 0.3 to 1.5 mg/l Annual 52

4.c Acceptability 5 color, apparent 10 color units Annual 52

6 turbidity 5 NTU Annual 52

Legend

(1) - Indicator parameters

(2) -The value of monitoring is to establish data w/c characterises a water supply in terms of seasonal and longer term changes. The onset of significant change in colony count results against the normal range established for that water supply is much more significant than the absolute values from the individual results.



Table 5. Monitoring in Existing Raw Water Sources

REGULATORY OFFICE




FRANK BEAUMONT






Item

Substance & parameter subject

to monitoring

SURFACE WATER SOURCE GROUNDWATER

Guideline Value frequency




5a. Primary parameters

1 Biological Oxygen Demand 3 mg/l quatrerly 4 1 mg/l

2 Chloride 250 mg/l quarterly 4 250 mg/l Semi-annual 2

3 color, true 50 TCU quarterly 4 5 TCU Semi-annual 2

4 Dissolved oxygen (1) 5 mg/l quarterly 4 5 mg/l

5 Fecal coliform < 2 MPN/ 100 ml quarterly 4 < 2 MPN/ 100 ml Semi-

annual 2

6 Nitrate as NO3-N 7 mg/l quarterly 4 7 mg/l

7 pH 6.5 - 8.5 quarterly 4 6.5 - 8.5 Semi-annual 2

8 Phosphate 0.5 mg/l quarterly 4 <0.03 mg/l

9 Temperature 26- 30 oC quarterly 4 26- 30 oC

10 Total suspended solids 50 mg/l quarterly 4 25 mg/l

11 Turbidity Semi-annual 2

12 Alkalinity Semi-annual 2

13 Plate count Semi-annual 2

5b Secondary parameters- Inorganic

14 Ammonia as NH3- N 0.05 mg/l quarterly 4 0.05 mg/l semi- annual 2

15 Barium (2) 0.7 mg/l quarterly 4 0.7 mg/l semi- annual 2

16 Boron (2) 0.5 mg/l quarterly 4 0.5 mg/l semi- annual 2

17 Fluoride 1mg/l quarterly 4 1mg/l semi- annual 2

18 Iron (2) 1 mg/l quarterly 4 1 mg/l semi- annual 2

19 Sulfate (2) 250mg/l quarterly 4 250mg/l Semi-annual 2




REGULATORY OFFICE




FRANK BEAUMONT





Item

Substance & parameter subject

to monitoring

SURFACE WATER GROUNDWATER


Annual sampling frequenc



5c Secondary parameters- Toxic metals (2, 3)

20 arsenic 0.01 mg/l semi- annual 2 0.01 mg/l Semi-

annual 2

21 cadmium 0.003 mg/l semi- annual 2 0.003 mg/l Semi-

annual 2

22 chromium as Cr +6 0.01mg/l semi- annual 2 0.01mg/l Semi-

annual 2

23 copper as dissolved copper 0.02 mg/l semi-

annual 2 0.02 mg/l Semi-annual 2

24 lead 0.01 mg/l semi- annual 2 0.01 mg/l Semi-

annual 2

25 manganese 0.2 mg/l semi- annual 2 0.2 mg/l Semi-

annual 2

26 mercury 0.001 mg/l semi- annual 2 0.001 mg/l Semi-

annual 2

27 nickel 0.02 mg/l semi- annual 2 0.02 mg/l Semi-

annual 2

28 zinc 2 mg/l semi- annual 2 2 mg/l Semi-

annual 2

Annual monitoring (sample collection preferably during the months of June to July)

5d Secondary parameters- Organics

29 Cyanide, Free 0.07mg/l annual 1 0.07mg/l every 3 years 1

30 PCBs <0.1 mg/l annual 1 <0.1 mg/l every 3 years 1

31 Phenol as Phenolic substances <0.001 mg/l annual 1 <0.001 mg/l every 3

years 1

32 Surfactants as MBAS 0.2 mg/l annual 1 <0.1 mg/l every 3 years 1

33 Aldrin 0.03 µg/l annual 1 0.03 µg/l every 3 years 1

34 Chlordane 0.2 µg/l annual 1 0.2 µg/l every 3 years 1

35 DDT 1 µg/l annual 1 1 µg/l every 3 years 1

36 Dieldrin 0.03 µg/l annual 1 0.03 µg/l every 3 years 1

37 Endrin 0.6 µg/l annual 1 0.6 µg/l every 3 years 1

38 Heptachlor 0.03 µg/l annual 1 0.03 µg/l every 3 years 1




REGULATORY OFFICE




FRANK BEAUMONT





Item


SURFACE WATER GROUNDWATER


Annual sampling frequenc Guideline Value frequency


39 Lindane 2 µg/l annual 1 2 µg/l every 3 years 1

40 Methoxychlor 50 µg/l annual 1 50 µg/l every 3 years 1

41 Toxaphene 4 µg/l annual 1 4 µg/l every 3 years 1

Legend (1) - samples shall be taken between 9:00 AM to 4:00 PM (2) - If the natural level exceeds the guideline, the natural level concentration prevails provided that the maximum increase in concentration is only up to 10 percent from the natural concentration (3) - unless otherwise specified, the above parameters are expressed as total metals

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