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STATE

Arizona

CONTAMINANTS

92

serves

6,760,000

data

2013-2024

UTILITIES

754

Overview

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

Large utilities in Arizona

Below are utilities in Arizona serving over 10,000 people, listed alphabetically.

UtilityLocationPeople Served
Arizona Water Company - Apache JunctionPhoenix, AZ62,055
Arizona Water Company - LakesidePhoenix, AZ12,191
Arizona Water Company - OraclePhoenix, AZ10,309
Arizona Water Company - OvergaardPhoenix, AZ13,797
Arizona Water Company - Pinal ValleyPhoenix, AZ113,516
Arizona Water Company - SedonaPhoenix, AZ12,104
Arizona Water Company - White TanksPhoenix, AZ18,858
Bella Vista City Water SystemSierra Vista, AZ20,045
Bermuda Water Company IncFort Mohave, AZ24,000
City of Apache JunctionApache Junction, AZ15,610
City of AvondaleAvondale, AZ83,001
City of Buckeye Sonora - SundanceBuckeye, AZ15,783
City of ChandlerChandler, AZ247,328
City of DouglasDouglas, AZ16,656
City of El MirageEl Mirage, AZ39,884
City of FlagstaffFlagstaff, AZ76,960
City of GlendalePhoenix, AZ234,766
City of Lake HavasuLake Havasu City, AZ54,610
City of MesaMesa, AZ466,000
City of NogalesNogales, AZ22,000
City of PeoriaPeoria, AZ135,975
City of PhoenixPhoenix, AZ1,695,000
City of PrescottPrescott, AZ42,217
City of SaffordThatcher, AZ20,600
City of San LuisSan Luis, AZ39,705
City of ScottsdaleScottsdale, AZ241,361
City of Show LowShow Low, AZ17,139
City of SomertonSomerton, AZ17,998
City of Surprise - Mountain VistaSurprise, AZ40,007
City of TempeTempe, AZ165,000
City of TucsonTucson, AZ732,906
City of YumaYuma, AZ103,264
Community WC of Green ValleyGreen Valley, AZ22,085
Cottonwood Municipal Water Cw1Cottonwood, AZ11,014
Desert OasisSurprise, AZ11,081
Epcor - San TanSan Tan Valley, AZ87,435
Epcor Water - Agua FriaEl Mirage, AZ80,959
Epcor Water - AnthemEl Mirage, AZ25,302
Epcor Water - Chaparral CityEl Mirage, AZ26,026
Epcor Water - MohaveBullhead City, AZ36,330
Epcor Water - North East Agua FriaEl Mirage, AZ14,723
Epcor Water - Paradise Valley/ScottsdaleEl Mirage, AZ14,107
Epcor Water - Sun CityEl Mirage, AZ38,016
Epcor Water - Sun City WestEl Mirage, AZ25,362
Festival RanchBuckeye, AZ10,313
Florence Water CompanyFlorence, AZ15,900
Flowing Wells Irrigation DistrictTucson, AZ16,000
Foothills UtilitiesYuma, AZ32,425
Global Water - Santa Cruz Water CompanyPhoenix, AZ17,005
Goodyear Water DepartmentGoodyear, AZ50,001
Johnson Utility - Anthem At Merrill RanchSan Tan Valley, AZ10,362
Kingman Municipal WaterKingman, AZ45,000
Lago Del Oro Water CompanySun Lakes, AZ18,132
Liberty Water LpscoLitchfield Park, AZ50,770
Liberty Water Rio RicoSierra Vista, AZ17,960
Marana Municipal - MaranaTucson, AZ13,242
Metropolitan DWIDTucson, AZ45,490
Oro Valley Water UtilityOracle, AZ42,316
Pima UtilitiesSun Lakes, AZ20,000
Prescott Valley WD UpperPrescott Valley, AZ55,723
Pueblo Del Sol Water CompanySierra Vista, AZ12,804
Sahuarita Water CompanySahuarita, AZ18,178
Town of GilbertGilbert, AZ247,600
Town of PaysonPayson, AZ17,682
Town of Queen CreekQueen Creek, AZ94,313
Tucson Water Corona De TucsonTucson, AZ10,083
US Army Fort HuachucaDragoon, AZ15,603
USAF Davis Monthan AFBDmafb, AZ18,640
Vail Water CompanyVail, AZ15,535

Utilities that accumulated/accrued the most violation points as of July 2021 to June 2024 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 ServedViolation Points
Villa Grande Domestic Water Improvement DistrictEloy, AZ273201
Papago Butte Domestic Water Improvement DistrictMaricopa, AZ450200
Maricopa Mountain Domestic Water Improvement District 1Maricopa, AZ450190
White Horse Ranch Owners AssociationPrescott, AZ292140
Cs Citrus Park Water CompanySt. Louis, AZ10110
Wellton, Town ofWellton, AZ2,375109
Pinedale Estates DwidLakeside, AZ25102
Alma RanchettesChandler, AZ10096
Tacna Water Management CompanyYuma, AZ20096
San Simon Domestic Water Improvement DistrictSan Simon, AZ30092
Cs Tierra Mesa Estates Water CompanySt. Louis, AZ68075
Sierra Vista Rv ParkCrystal River, AZ14075
Desert Gardens Rv Resort Co-op, Inc.Florence, AZ12070
Gw- Rincon Water CompanyPhoenix, AZ17165
Lagoon Estates Water Company Unit 2Mohave Valley, AZ12562
Green Valley Mobile Home ParkFlagstaff, AZ19061
Cs Rancheros Bonitos Water CompanySt. Louis, AZ14455
Katherine Landing DwtpBoudler City, AZ15045
Whispering Winds ApartmentsChino Valley, AZ6043
Payson Water - East Verde EstatesTopock, AZ39640
Cibola Mutual Water CompanyCibola, AZ4538
Germann Water Users AssociationChandler, AZ3531
Lil W RanchStar Valley, AZ19030
Jones Co-op Water AssociationYuma, AZ2729
Ranch Water Service Inc.Kingman, AZ13526
Softwinds Mobile Home ParkMira Loma, AZ8022
Grandview Water CompanyBuckeye, AZ5021
Picacho Peak Water CompanyTempe, AZ2516
Silver Creek Rv ParkBullhead City, AZ16416
Old Concho Water UsersBeaver Dam, AZ4016

Large utilities that accumulated/accrued the most violation points as of July 2021 to June 2024 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 ServedViolation Points
Epcor Water - MohaveBullhead City, AZ36,33014
Pima UtilitiesSun Lakes, AZ20,00011
Epcor Water - Agua FriaEl Mirage, AZ80,9599
Town of GilbertGilbert, AZ247,6006
Global Water - Santa Cruz Water CompanyPhoenix, AZ17,0055
City of Apache JunctionApache Junction, AZ15,6103
City of FlagstaffFlagstaff, AZ76,9603
City of Surprise - Mountain VistaSurprise, AZ40,0072
City of ChandlerChandler, AZ247,3282
City of AvondaleAvondale, AZ83,0012
Epcor Water - Chaparral CityEl Mirage, AZ26,0262
Johnson Utility - Anthem At Merrill RanchSan Tan Valley, AZ10,3621
City of PrescottPrescott, AZ42,2171
Metropolitan DWIDTucson, AZ45,4901
Goodyear Water DepartmentGoodyear, AZ50,0011
City of El MirageEl Mirage, AZ39,8841
Flowing Wells Irrigation DistrictTucson, AZ16,0001
Epcor - San TanSan Tan Valley, AZ87,4351
City of PeoriaPeoria, AZ135,9751
Epcor Water - North East Agua FriaEl Mirage, AZ14,7231
Epcor Water - Paradise Valley/ScottsdaleEl Mirage, AZ14,1071

Contaminants found in Arizona above health guidelines

Found above health guidelines Found
Contaminant # of Utilities People Served # of Utilities People Served
Total trihalomethanes (TTHMs)4386,586,1254536,608,013
Nitrate6296,487,2117236,725,757
Arsenic5166,476,1705166,476,170
Haloacetic acids (HAA9)916,068,053926,085,192
Chromium (hexavalent)845,851,857906,037,227
Haloacetic acids (HAA5)2095,636,7252175,768,973
Uranium, combined (pCi/L)1124,516,9711174,644,194
Nitrate & nitrite4493,808,4884963,953,091
Chlorite92,605,849102,682,809
Dibromochloromethane1971,852,4802081,860,930
Bromoform1581,733,3312211,864,228
Bromodichloromethane1431,677,0331451,697,852
Perfluorohexane sulfonate (PFHXS)281,143,015281,143,015
Radium, combined (-226 & -228)1771,034,0602235,345,252
Bromate4899,5764899,576
Perfluorooctanoic acid (PFOA)17519,53918767,139
Perfluorooctane sulfonate (PFOS)19488,11321743,073
Chloroform57467,0511051,474,138
Tetrachloroethylene (perchloroethylene)7180,03211979,006
1,2,3-Trichloropropane150,770150,770
Perfluorononanoic acid (PFNA)150,001150,001
1,2-Dibromo-3-chloropropane (DBCP)339,9298819,818
Cadmium517,71710652,469
Perfluorodecanoic acid (PFDA)117,682117,682
Heptachlor epoxide19,09429,294
Benzo[a]pyrene19,09419,094
Heptachlor19,09419,094
Chlorate11,403775,703,581
Polychlorinated biphenyls (PCBs)19002996
Simazine1614915,396
Antimony249411111,723
Vinyl chloride165165
Beryllium15034,746
2,3,7,8-TCDD (Dioxin)125125

Contaminants found in Arizona above legal limits

Contaminant # of Utilities People Served

Arsenic		124,286

Nitrate and nitrite		92,412

Total trihalomethanes (TTHMs)		12,375

Nitrate		61,921

Uranium		3858

Nitrite		1600

Fluoride		3481

Haloacetic acids (HAA5)		1150

2,3,7,8-TCDD (Dioxin)		125

What filter type is right for you?

Water
Contaminants

view utility

Carbon Filters

Can reduce the levels of many common contaminants.

pros

  • Lower upfront cost
  • Reduced maintenance

cons

  • Does not remove all contaminants

Reverse Osmosis

Most effective at reducing contaminants.

pros

  • Most effective

cons

  • Higher upfront cost
  • Requires more maintenance
  • Wastes water

Other Considerations

Ion Exchange

Pros: Softens hard water, Reduces some contaminants

Cons: Doesn't remove all contaminants

Whole-House Filters

Pros: Useful for reducing radiologicals and TCE

Cons: Expensive to install and maintain, Risk of bacterial contamination

Distillation

Pros: Removes heavy metals and harmful microbes

Cons: Does not reduce most contaminants

view utility UNDERSTAND FILTER TECHNOLOGY

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