1

To ensure your tap water is safe, clean and secure, Tucson Water conducts approximately 14,500 individual tests each year on the water in the main distribution system – before it reaches your home. Test results for key parameters are reported by 10 water quality zones for a water distribution system that covers some 390 square miles.

December 2019

Main Water System

Oracle R

d

Speedway Blvd

6th Ave

Ajo Hwy

No

gales

Hw

y

Alverno

n Way

River Rd

Golf Links Rd

Wilm

ot R

d

Sto

ne Ave

Ajo Way

�

Mis

sion

Rd

Kinney Rd

San Joaquin RdS

andario

Rd Speedway Blvd

Grant Rd

Broadway BlvdBarazza-

Aviation Pkwy

Tanque Verde Rd

Irvington Rd

Valencia Rd

Wilm

ot R

d

Ho

ughto

n Rd

Old Spanish Trail

Cm

o d

eO

este

Ina Rd

OrangeGrove Rd

Sunrise Dr

Cam

pb

ell Ave

1st Ave

Tho

rnydale R

d

Tangerine Rd

Moore Rd

DoveMountain

Blvd

Avra Valley Rd

Twin Peaks Rd

Silverbell Rd

Catalina Hwy

Sabi

noC

anyo

n R

d

Valencia Rd

Benson Hwy

Sw

an Rd

Ko

lb R

d

Water in theseareas is supplied

by independentwater companies.

Santa

Catalina

Mountains

Tucson

Mountains

San Xavier

Indian

Reservation

Saguaro

National

ParkDAVIS

MONTHANAIR FOR CE BASE

1

1

10 9

2

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8

54

6

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10

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Water Quality Zones

3

710

10

9

86

10

77

10

19

2

To ensure your tap water is safe, clean and secure, Tucson Water conducts approximately 14,500 individual tests each year on the water in the main distribution system – before it reaches your home. Test results for key parameters are reported by 10 water quality zones for a water distribution system that covers some 390 square miles.

December 2019

Test Results by Water Quality Zone

Due to rounding, systemwide averages may vary. mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

12345678910

Avg

Zones Sodium (mg/L) 86 SP

6767676863656567697166

Nitrate-N (mg/L) 86 SP

1.151.221.430.700.710.800.801.571.240.641.04

Hardness (mg/L) 86 SP

230239238240225232226267261248239

Fluoride(mg/L) 86 SP

0.470.450.510.410.370.390.390.400.390.340.41

pH Level(SU) 247 SP

8.08.07.97.87.97.98.07.87.77.87.9

Temperature (deg°F) 247 SP

71.971.170.471.471.470.369.069.072.372.770.8

Main Water System

Minerals(mg/L) 247 SP

488502488514476498468533531498497

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility RangeResults: (247 samples)

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (247 samples) ................0E. Coli positive results (247 samples) .............................0Follow-up assessment required? .................................no

0.8 mg/L

1.2 mg/L

4.0 mg/L

1.0 mg/L

3

To ensure your tap water is safe, clean and secure, Tucson Water conducts approximately 14,500 individual tests each year on the water in the main distribution system – before it reaches your home. Test results for key parameters are reported by 10 water quality zones for a water distribution system that covers some 390 square miles.

December 2019

Corona de Tucson is a community near Sahuarita and Houghton roads, with about 2,600 connections supplying about 7,300 people with water from three wells.

Catalina is a community partially served by Tucson Water. It has about 400 connections, supplying water to about 1,000 people with water from two wells.

Catalina Water System

�

STALLION LNWASH

BIG

PINAL COUNTY

PIMACOUNTY

OR

AC

LE R

D

FOR

EC

AS

TL

E A

VE

77

EDWIN RD

EDWIN RD

EAGLE CRESTRANCH BLVD

PINAL ST

PALOMINOLN

PINTOLN

EL

KIN

S R

D

MAINSAIL BLVD T

WIN

LA

KE

S D

R

Ground Water Well

Corona de Tucson Water System

SAHUARITA RD

HO

UG

HT

ON

RD

�

CMO DELTORO

PIMA MINE RANCH RD

TEST RESULTS from up to 2 Sample Points (SP)

mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

TEST RESULTS from up to 13 Sample Points (SP)

mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

Sodium (mg/L) 10 SP

Nitrate-N (mg/L) 10 SP

Hardness(mg/L) 10 SP

pH Level(SU) 10 SP

Temperature (deg°F) 10 SP

Fluoride (mg/L) 10 SP

Minerals (mg/L) 10 SP

33548 1.32168 7.8 66.30.48Sodium

(mg/L) 1 SPNitrate-N (mg/L) 1 SP

Hardness(mg/L) 1 SP

pH Level(SU) 2 SP

Temperature (deg°F) 2 SP

25 0.4689 8.2 66.0

Fluoride (mg/L) 1 SP

0.56

Minerals (mg/L) 2 SP

179

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility Range

Results: (2 samples)

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (2 samples) .......................0E. Coli positive results (2 samples) ......................................0Follow-up assessment required? ......................................no

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility RangeResults: (10 samples)

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (10 samples) .....................0E. Coli positive results (10 samples) ....................................0Follow-up assessment required? ......................................no

0.8 mg/L

1.2 mg/L

4.0 mg/L

0.8 mg/L

1.2 mg/L

4.0 mg/L

1.1 mg/L1.3 mg/L

4

To ensure your tap water is safe, clean and secure, Tucson Water conducts approximately 14,500 individual tests each year on the water in the main distribution system – before it reaches your home. Test results for key parameters are reported by 10 water quality zones for a water distribution system that covers some 390 square miles.

December 2019

Rancho del Sol Lindo is a community southwest of Silverbell and North Trico roads. Rancho del Sol Lindo has about 1,000 connections, supplying about 2,700 people with water from two wells.

Diamond Bell is a community south and east of Sasabe Road and Diamond Bell Ranch Road respectively, with

about 200 connections supplying about 570 people with water from two wells.

Diamond Bell Water System

�DIAMOND BELL

STAGECOACHRD

RANCH RDFANNIN RD

LYNNETTE RD

SH

AW

RD

SASABE

RD

Rancho del Sol Lindo & White Fence Farms Water System

TEST RESULTS from 1 Sample Point (SP)TEST RESULTS from up to 3 Sample Points (SP)

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SILVERBELL

RD

LAMBERT LN

EL TIRO RD

TR

ICO

RD

DE

RR

ING

ER

RD

PU

MP

STA

TIO

N R

D

AVRA VALLEY RD

mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

Sodium (mg/L) 1 SP

Nitrate-N (mg/L) 1 SP

Hardness(mg/L) 1 SP

pH Level(SU) 1 SP

Temperature (deg°F) 1 SP

Fluoride (mg/L) 1 SP

Minerals (mg/L) 1 SP

21629 1.61110 7.9 66.70.29

Sodium (mg/L) 1 SP

Nitrate-N (mg/L) 1 SP

Hardness(mg/L) 1 SP

pH Level(SU) 3 SP

Temperature (deg°F) 3 SP

Fluoride (mg/L) 1 SP

Minerals (mg/L) 3 SP

43951 5.29189 7.8 67.90.68

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility Range

Results: (1 sample)

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (1 sample) .........................0E. Coli positive results (1 sample) .......................................0Follow-up assessment required? ......................................no

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility Range

Results: (3 samples)

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (3 samples) .......................0E. Coli positive results (3 samples) ......................................0Follow-up assessment required? ......................................no

0.8 mg/L

1.2 mg/L

4.0 mg/L

0.8 mg/L

1.2 mg/L

4.0 mg/L

0.9 mg/L

0.7 mg/L

5

To ensure your tap water is safe, clean and secure, Tucson Water conducts approximately 14,500 individual tests each year on the water in the main distribution system – before it reaches your home. Test results for key parameters are reported by 10 water quality zones for a water distribution system that covers some 390 square miles.

December 2019

This is a small community by the Three Points area, with 30 connections supplying about 75 people from one well.

Sierrita Foothills Water System Silverbell West Water System

CHIN

A DRAW

SILVERBELL RD

SANTA CRUZ RIVER

MARAN

ATOW

N LIM

ITS

LOS ROBLES WASH

�

SA

ND

ER

S R

D

�SCOTLAND ST

STANFORDRD

HUNT RD

WE

LL

S FA

RG

O R

D

CH

ER

OK

EE

LN

SIE

RR

ITA M

OU

NTA

INR

DPARKIN LN

Sample Point

TEST RESULTS from 1 Sample Point (SP)

TEST RESULTS from 1 Sample Point (SP)

Sodium (mg/L) 1 SP

Nitrate-N (mg/L) 1 SP

Hardness(mg/L) 1 SP

pH Level(SU) 1 SP

Temperature (deg°F) 1 SP

Fluoride (mg/L) 1 SP

Minerals (mg/L) 1 SP

21537 1.7492 8.0 66.20.51

Sodium (mg/L) 1 SP

Nitrate-N (mg/L) 1 SP

Hardness(mg/L) 1 SP

pH Level(SU) 1 SP

Temperature (deg°F) 1 SP

Fluoride (mg/L) 1 SP

Minerals (mg/L) 1 SP

59578 4.33279 7.5 65.80.38

The Silverbell West system has 83 connections serving about 230 people from one well.

mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility Range

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (1 sample) .........................0E. Coli positive results (1 sample) .......................................0Follow-up assessment required? ......................................no

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility RangeResults: (1 sample)

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (1 sample) .........................0E. Coli positive results (1 sample) .......................................0Follow-up assessment required? ......................................no

Results: (1 sample)0.8 mg/L

1.2 mg/L

4.0 mg/L

0.8 mg/L

1.2 mg/L

4.0 mg/L

1.1 mg/L

0.9 mg/L

6

To ensure your tap water is safe, clean and secure, Tucson Water conducts approximately 14,500 individual tests each year on the water in the main distribution system – before it reaches your home. Test results for key parameters are reported by 10 water quality zones for a water distribution system that covers some 390 square miles.

December 2019

Thunderhead Ranch is a small subdivision west of Old Spanish Trail and about one and a half miles south of Irvington Road. It has about 57 connections supplying about 160 people with water from two wells.

Thunderhead Ranch Water System

TUCS

ON C

ITY

LIM

ITS �

SP

AN

ISH

THUNDERHEAD RANCH RDHILLCREST CIR

RINCON WASH

PANTANO WASH

OLD

TRAILPOOR

MAN RD

TEST RESULTS from 1 Sample Point (SP)

The Police-Fire Academy, south of Interstate 10 and east of Wilmot Road, was built in the late 1990s. One well supplies about 25 people regularly, plus class members taught at this facility.

Tucson Police-Fire Academy Water System

�OLD VAIL RD

WILM

OT R

D

To I-10

NOGALES OLD VAILCONNECTION RD

TEST RESULTS from 1 Sample Point (SP)Sodium

(mg/L) 1 SPNitrate-N (mg/L) 1 SP

Hardness(mg/L) 1 SP

pH Level(SU) 1 SP

Temperature (deg°F) 1 SP

Fluoride (mg/L) 1 SP

Minerals (mg/L) 1 SP

13413 1.4483 8.0 66.70.18

Sodium (mg/L) 1 SP

Nitrate-N (mg/L) 1 SP

Hardness(mg/L) 1 SP

pH Level(SU) 1 SP

Temperature (deg°F) 1 SP

Fluoride (mg/L) 1 SP

Minerals (mg/L) 1 SP

36243 0.83201 7.9 67.30.32mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility RangeResults: (1 sample)

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (1 sample) .........................0E. Coli positive results (1 sample) .......................................0Follow-up assessment required? ......................................no

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility Range

Results: (1 sample)

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (1 sample) .........................0E. Coli positive results (1 sample) .......................................0Follow-up assessment required? ......................................no

0.8 mg/L

1.2 mg/L

4.0 mg/L

1.0 mg/L0.8 mg/L

1.2 mg/L

4.0 mg/L1.5 mg/L

7

To ensure your tap water is safe, clean and secure, Tucson Water conducts approximately 14,500 individual tests each year on the water in the main distribution system – before it reaches your home. Test results for key parameters are reported by 10 water quality zones for a water distribution system that covers some 390 square miles.

December 2019

Valley View Acres is a small community north of Hilltop Road, just west of Sandario Road, with about 150 connections supplying about 470 people with water from two wells.

Valley View Acres Water System

HILLTOP RD

CASTLE DR

SAN

DA

RIO

RD

RIV

IER

A D

R

SIE

RR

ITA

MO

UN

TAIN

RD � To SR 86

TEST RESULTS from 1 Sample Point (SP)Sodium

(mg/L) 1 SPNitrate-N (mg/L) 1 SP

Hardness(mg/L) 1 SP

pH Level(SU) 1 SP

Temperature (deg°F) 1 SP

Fluoride (mg/L) 1 SP

Minerals (mg/L) 1 SP

27053 1.5291 7.8 74.10.46mg/L = milligrams per liter 1 mg/L = 1 teaspoon in 1,302 gallons SU = Standard Units SP = Sample Points deg°F = Degrees Fahrenheit

Chlorine Levels Tucson Water adds disinfectant chlorine to kill bacteria, viruses and germs in water & pipes.

EPA Standard Maximum

Utility RangeResults: (1 sample)

Bacteria TestingThe EPA standard is zero (0) positive test results across samples.

Total Coliform positive results (1 sample) .........................0E. Coli positive results (1 sample) .......................................0Follow-up assessment required? ......................................no

0.8 mg/L

1.2 mg/L

4.0 mg/L

1.2 mg/L