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EWG's Tap Water Database

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Arizona

  • 748 Utilities

  • Serving: 6,260,000

  • Data available: 2010-2015

  • Contaminants Found: 73

 

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
Bella Vista City Water SystemRio Rico, AZ23,100
Bermuda Water Company IncBullhead City, AZ18,000
City of Apache JunctionApache Junction, AZ13,657
City of AvondaleAvondale, AZ79,335
City of Buckeye Sonora - SundanceBuckeye, AZ15,783
City of ChandlerChandler, AZ300,000
City of DouglasDouglas, AZ13,300
City of El MirageEl Mirage, AZ36,905
City of FlagstaffFlagstaff, AZ67,000
City of GlendaleGlendale, AZ180,000
City of Lake HavasuLake Havasu City, AZ54,610
City of MesaMesa, AZ466,000
City of NogalesNogales, AZ22,000
City of PeoriaPeoria, AZ124,500
City of PhoenixPhoenix, AZ1,500,000
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, AZ15,716
City of SomertonSomerton, AZ15,000
City of Surprise - Mountain VistaSurprise, AZ40,615
City of TempeTempe, AZ165,000
City of TucsonTucson, AZ675,686
City of YumaYuma, AZ103,264
More

Utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 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
Copper Mountain Ranch CfdCasa Grande, AZ909181
Thunderbird Farms Domestic Water Improvement DistrictMaricopa, AZ1,600150
Ranch Water Service Inc.Kingman, AZ13593
San Simon Domestic Water Improvement DistrictSan Simon, AZ31081
Wenden Domestic Water Improvement DistrictWenden, AZ47580
Tacna Water Management CompanyYuma, AZ19278
Sierra Pacific Mobile ManorTempe, AZ81676
Alma RanchettesQueen Creek, AZ10071
Sun Leisure Estates Utilities CompanyYuma, AZ14367
Wellton, Town ofWellton, AZ2,88266
Rio Verde Rv ParkCottonwood, AZ21361
Fishers Landing ResortYuma, AZ40256
Bouse Worley Water SystemBouse, AZ19053
Tombstone, City ofTombstone, AZ1,56051
Lake Verde Water CompanyCamp Verde, AZ12533
Sun Valley Farms Unit ViSan Tan Valley, AZ60030
Why Domestic Water Improvement DistrictAjo, AZ40026
Peekaboo Water Co-opGilbert, AZ10025
Cameron Trading PostCameron, AZ89620
Brooke Water LLC - Moovalya KeysBakersfield, AZ1,39020
White Horse Ranch Owners AssociationPrescott, AZ29220
Jones Co-op Water AssociationYuma, AZ3517
Citrus Park Water CompanyYuma, AZ4016
Cave Creek Water CompanyCave Creek, AZ6,81516
Mile Marker 54 Water Company Water WellSahuarita, AZ6915
Kelvin Simmons Co-opKearny, AZ2515
Rancho Tierra Blanca Property Owners AssociationMarana, AZ10214
Saguaro Mobile Home ParkKearny, AZ3613
Johnson UtilitiesScottsdale, AZ62,15812
Mohawk Utility CompanyWellton, AZ30012

Large utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 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
Johnson UtilitiesScottsdale, AZ62,15812
City of NogalesNogales, AZ22,0007
City of TucsonTucson, AZ675,6866
City of TempeTempe, AZ165,0006
Far West Water & Sewer IncYuma, AZ32,4255
City of SaffordSafford, AZ18,9005
Town of GilbertGilbert, AZ210,0005
City of PrescottPrescott, AZ43,2172
City of Apache JunctionApache Junction, AZ13,6571
Florence Water CompanyFlorence, AZ14,8801
City of San LuisSan Luis, AZ27,8001
Pima UtilitiesSun Lakes, AZ20,0001
City of PeoriaPeoria, AZ124,5001
Bermuda Water Company IncBullhead City, AZ18,0001
Metropolitan DWIDTucson, AZ43,4331

Contaminants found in Arizona above health guidelines

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

Total trihalomethanes (TTHMs)
3205,849,6973415,924,833

Chromium (hexavalent)
1485,448,3661535,617,430

Uranium
1515,050,7761555,091,116

Arsenic
2544,784,4632544,784,463

Radium-228
1162,909,6391213,627,388

Bromate
112,837,195112,837,195

Chlorite
102,599,975122,667,100

Radon
72,296,76372,296,763

Radium-226
2041,591,7312204,627,530

Perfluorooctane sulfonate (PFOS)
42972,67242972,672

Perfluorohexane sulfonate (PFHXS)
38928,20438928,204

Nitrate and nitrite
35631,4621584,665,942

Tetrachloroethylene (perchloroethylene)
5493,5095493,509

Nitrate
85403,9106726,115,477

Strontium
17269,0321545,617,966

Perfluorooctanoic acid (PFOA)
5233,2965233,296

Chlorate
13155,4861365,313,752

1,2-Dibromo-3-chloropropane (DBCP)
3128,2584594,258

Perfluoroheptanoic acid (PFHPA)
350,6144215,614

1,2,3-Trichloropropane
250,078250,078

Vanadium
220,8511535,612,648

Barium
18,2201444,304,806

Bromodichloromethane
12,90012,900

Dibromochloromethane
12,90012,900

Di(2-ethylhexyl) phthalate
11,740443,438

Vinyl chloride
11,38511,385

Cadmium
22512251

Thallium
130227,830

Contaminants found in Arizona above legal limits

Contaminant# of UtilitiesPeople Served

Arsenic
1916,482

Nitrate
105,322

Total trihalomethanes (TTHMs)
44,644

Nitrate and nitrite
53,630

Fluoride
3516

Uranium
5433

Cadmium
1203

Radium, combined (-226 & -228)
2181