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EWG's Tap Water Database — 2021 UPDATE

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Arizona

  • 747 Utilities

  • Serving: 6,468,000

  • Data available: 2014-2019

  • Contaminants Found: 77

 

EWG's drinking water quality report for Arizona shows results of tests conducted by the water utilities in Arizona and provided to EWG by the Arizona Department of Environmental Quality.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

Below are utilities in Arizona serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.

Large utilities in Arizona

UtilityLocationPeople
Served
Arizona Water Company - Apache JunctionPhoenix, AZ57,647
Arizona Water Company - LakesidePhoenix, AZ10,882
Arizona Water Company - OvergaardPhoenix, AZ10,426
Arizona Water Company - Pinal ValleyPhoenix, AZ88,019
Arizona Water Company - SedonaPhoenix, AZ12,191
Arizona Water Company - Sierra VistaPhoenix, AZ10,002
Arizona Water Company - White TanksPhoenix, AZ10,186
Bella Vista City Water SystemSierra Vista, AZ20,045
Bermuda Water Company IncFort Mohave, AZ18,000
City of Apache JunctionApache Junction, AZ13,657
City of AvondaleAvondale, AZ83,001
City of Buckeye Sonora - SundanceBuckeye, AZ15,783
City of ChandlerChandler, AZ247,328
City of DouglasDouglas, AZ13,300
City of El MirageEl Mirage, AZ39,884
City of FlagstaffFlagstaff, AZ67,000
City of GlendalePhoenix, AZ234,766
City of Lake HavasuLake Havasu City, AZ54,610
City of MesaMesa, AZ466,000
City of NogalesRio Rico, AZ22,000
City of PeoriaPeoria, AZ135,975
City of PhoenixPhoenix, AZ1,579,000
City of PrescottPrescott, AZ43,217
City of SaffordSafford, AZ18,900
City of San LuisSan Luis, AZ27,800
City of ScottsdaleScottsdale, AZ230,000
City of Show LowShow Low, AZ17,139
City of SomertonSomerton, AZ15,818
City of Surprise - Mountain VistaSurprise, AZ31,649
City of TempeTempe, AZ165,000
More

Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Arizona

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served		Violation
Points
Mohawk Valley School DistrictRoll, AZ220394
Villa Grande Domestic Water Improvement DistrictEloy, AZ283150
Wellton, Town ofWellton, AZ2,88297
Papago Butte Domestic Water Improvement DistrictMaricopa, AZ50093
San Simon Domestic Water Improvement DistrictSan Simon, AZ31292
Maricopa Mountain Domestic Water Improvement District 1Maricopa, AZ45090
Mohawk Utility CompanyWellton, AZ26787
Sierra Pacific Mobile ManorYuma, AZ81686
Tacna Water Management CompanyYuma, AZ20076
Cibola Mutual Water CompanyChibola, AZ16275
Citrus Park Water CompanyYuma, AZ3072
Bouse DwidBouse, AZ14272
Shepard Water CompanyYuma, AZ42067
Kelvin Simmons Co-opSan Tan Valley, AZ2567
Alma RanchettesChandler, AZ10065
Silver Creek Rv ParkBullhead City, AZ28065
Yuma Lakes ResortParker, AZ73262
Ds Water CompanyDesert Springs,, AZ24461
White Hills Water Company Unit 1Gilbert, AZ9045
Pinedale Estates DwidLakeside, AZ20842
Monte Vista Water CompanyDouglas, AZ15036
Oak Creek Water Company 1Sedona, AZ1,50030
Rancheros Bonitos Water CompanyYuma, AZ14421
Ranches At Maricopa WaterMaricopa, AZ3020
Katherine Landing DwtpBoudler City, AZ1,30017
Cottonwood Municipal Water Vv6Cottonwood, AZ4,82017
Pueblo Del Sol Water CompanySierra Vista, AZ12,80416
Duncan, Town ofDuncan, AZ36515
Mountain View Mobile VillageYuma, AZ7515
Acme Water - Yavapai EstatesPhoenix, AZ24315

Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Arizona

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served		Violation
Points
Pueblo Del Sol Water CompanySierra Vista, AZ12,80416
Cottonwood Municipal Water Cw1Cottonwood, AZ10,89510
City of Apache JunctionApache Junction, AZ13,6575
Bermuda Water Company IncFort Mohave, AZ18,0005
City of TucsonTucson, AZ675,6862
City of PeoriaPeoria, AZ135,9752
Epcor Water - Agua FriaYoungtown, AZ80,9592
Far West Water & Sewer IncYuma, AZ32,4252
City of DouglasDouglas, AZ13,3002
City of NogalesRio Rico, AZ22,0001
Epcor Water - Chaparral CityYoungtown, AZ26,0261
City of Show LowShow Low, AZ17,1391
Epcor Water - MohaveYoungtown, AZ36,3301
Metropolitan DWIDTucson, AZ44,9981
Johnson UtilitiesSan Tan Valley, AZ62,1581
USAF Davis Monthan AFBDmafb, AZ16,0001
US Army Fort HuachucaDragoon, AZ15,6031
Town of GilbertGilbert, AZ247,6001

Contaminants found in Arizona above health guidelines

Found above health guidelinesFound
Contaminant# of UtilitiesPeople Served# of UtilitiesPeople Served

Nitrate		6706,335,6036916,397,771

Total trihalomethanes (TTHMs)		4206,295,8434246,305,952

Arsenic		4276,162,1684276,162,168

Haloacetic acids (HAA5)		2455,622,3162475,672,564

Chromium (hexavalent)		945,590,794995,760,676

Haloacetic acids (HAA9)		785,104,2321005,791,057

Radium, combined (-226 & -228)		2414,773,3462475,495,284

Nitrate and nitrite		2293,102,5732363,130,570

Uranium		1053,042,8371083,052,690

Chlorite		102,497,197102,497,197

Dibromochloromethane		122797,025122797,025

Bromoform		125734,808138761,215

Bromodichloromethane		90688,45090688,450

Radon		5562,7635562,763

1,2-Dibromo-3-chloropropane (DBCP)		6520,2216520,221

Bromate		2383,5752383,575

Chloroform		52346,67859507,303

Perfluorooctane sulfonate (PFOS)		6271,7616271,761

Perfluorooctanoic acid (PFOA)		5243,7155243,715

Tetrachloroethylene (perchloroethylene)		11235,041171,029,892

Perfluorohexane sulfonate (PFHXS)		4226,0334226,033

Chlorate		8158,564865,437,678

Trichloroethylene		9110,254171,439,213

Perfluoroheptanoic acid (PFHPA)		361,0334226,033

1,2,3-Trichloropropane		260,753260,753

Vanadium		220,851995,755,638

Cadmium		620,2777255,043

Barium		29,0954186,084,514

Pentachlorophenol		53,47411737,947

Antimony		15407564,387

Di(2-ethylhexyl) phthalate		2292641,742,507

Simazine		18051,842

Beryllium		150150

Carbon tetrachloride		142142

Contaminants found in Arizona above legal limits

Contaminant# of UtilitiesPeople Served

Arsenic		157,988

Total trihalomethanes (TTHMs)		43,344

Radium, combined (-226 & -228)		22,107

Nitrate and nitrite		41,832

Nitrate		61,490

Uranium		4998

Fluoride		2368