Arizona tap water quality
835 active community water systems.
Largest water systems
| Grade | System | People | Health violations (5y) |
|---|
| A | City of Phoenix Water Services | 1,695,000 | 0 |
| B | Tucson Water | 732,906 | 0 |
| B | City of Mesa Water Resources | 466,000 | 0 |
| C | Town of Gilbert | 247,600 | 0 |
| B | City of Chandler | 247,328 | 0 |
| A | City of Scottsdale | 241,361 | 0 |
| A | City of Glendale | 234,766 | 0 |
| B | City of Peoria | 187,676 | 0 |
| D | City of Tempe | 165,000 | 0 |
| A | Arizona Water Co - Pinal Valley | 134,432 | 0 |
| C | Epcor - Agua Fria | 128,040 | 2 |
| D | City of Yuma | 103,264 | 7 |
| C | City of Avondale | 96,130 | 0 |
| A | Town of Queen Creek | 95,502 | 0 |
| B | Epcor - San Tan | 87,435 | 0 |
| C | Gw Santa Cruz Water Co | 84,000 | 1 |
| B | City of Flagstaff | 79,796 | 0 |
| A | Arizona Water Co - Apache Junction | 62,055 | 0 |
| D | Liberty Water Lpsco | 57,070 | 1 |
| A | Town of Prescott Valley | 57,048 | 0 |
| B | City of Lake Havasu | 54,610 | 0 |
| D | Goodyear Water Department | 50,001 | 1 |
| B | Metropolitan Dwid | 45,570 | 0 |
| C | Kingman Municipal Water | 45,000 | 0 |
| A | Oro Valley Water Utility | 42,316 | 0 |
| D | City of Prescott | 42,217 | 1 |
| A | Surprise City of - Mountain Vista | 40,007 | 0 |
| B | City of El Mirage | 39,884 | 0 |
| C | City of San Luis | 39,705 | 2 |
| A | Epcor - Sun City | 38,016 | 0 |
| D | Bullhead City Mohave | 36,330 | 2 |
| B | Foothills Water and Sewer LLC | 32,425 | 0 |
| B | City of Buckeye - Valencia Town Division | 30,377 | 0 |
| A | Epcor - Chaparral City | 26,026 | 0 |
| A | Epcor - Sun City West | 25,796 | 0 |
| B | Bermuda Water Company Inc | 25,000 | 0 |
| A | Desert Oasis | 23,963 | 0 |
| B | Epcor - Anthem | 23,826 | 0 |
| B | Gric Dpw Wild Horse Pass | 22,795 | 1 |
| A | Community WC of Green Valley | 22,085 | 0 |
| C | City of Nogales | 22,000 | 2 |
| B | City of Buckeye Sonora - Sundance | 21,405 | 0 |
| B | Salt River Public Works | 20,951 | 1 |
| C | City of Safford | 20,600 | 1 |
| A | Bella Vista City Water System | 20,045 | 0 |
| C | Pima Utilities | 20,000 | 2 |
| A | Arizona Water Co - White Tanks | 18,858 | 0 |
| B | USAF Davis Monthan AFB | 18,640 | 0 |
| A | Sahuarita Water Company | 18,178 | 0 |
| B | Lago Del Oro Water Company | 18,132 | 0 |
Most issues (systems serving 10,000+)
D7 health-based violations in the last 5 years; 13 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
D6 health-based violations in the last 5 years; 39 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D11 health-based violations in the last 5 years; 29 monitoring/reporting violations; 9 not yet resolved; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D1 health-based violation in the last 5 years; 3 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2025).
D1 health-based violation in the last 5 years; 1 monitoring/reporting violation; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2023).
D1 health-based violation in the last 5 years; 35 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2025).
D1 health-based violation in the last 5 years; 37 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2025).
D1 health-based violation in the last 5 years; 54 monitoring/reporting violations; 1 not yet resolved; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Lead 90th percentile below the action level (2025).
D2 health-based violations in the last 5 years; 329 monitoring/reporting violations; 1 not yet resolved; PFOA/PFOS average above the 4 ppt federal limit: PFOS; Lead 90th percentile below the action level (2025).
D3 health-based violations in the last 5 years; 139 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
DNo health-based violations in the last 5 years; 4 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2024).
DNo health-based violations in the last 5 years; 2 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2025).
DNo health-based violations in the last 5 years; 1 monitoring/reporting violation; PFOA/PFOS average above the 4 ppt federal limit: PFOA, PFOS; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2023).
D1 health-based violation in the last 5 years; 1 monitoring/reporting violation; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile below the action level (2025).
DNo health-based violations in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2024).
C2 health-based violations in the last 5 years; 16 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
C2 health-based violations in the last 5 years; 23 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
C2 health-based violations in the last 5 years; 11 monitoring/reporting violations; 3 not yet resolved; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
C2 health-based violations in the last 5 years; 95 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
CNo health-based violations in the last 5 years; 4 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile below the action level (2025).
Cities
AdamanAerdyneAguilaAjoAk-Chin VillageAli Molina, Ali Chukson, ArtesaAlpineAmadoAnthemApache JunctionApache LakeArivacaArizona CityAsh ForkAvondaleAvra ValleyBacaviBagdadBapchuleBeaver CreekBeaver DamBeaver Dam EstatesBeaver ValleyBellemontBensonBermuda Palms ResortBisbeeBlack Canyon CityBonitaBourden Ranch EstatesBouseBowieBuckeyeBullhead CityBylasCameronCamp VerdeCarefreeCarrizoCarterCasa Blanca, Bapchule, Wet Camp, Sacate, WesCasa GrandeCatalinaCave CreekCentennial ParkCentralChandlerCharco 27Chino ValleyChlorideChristopher CreekChui ChuCibecueCibolaCircle CityClarkdaleClay SpringsClaypoolCliftonClints WellCochiseColorado CityComobabi, CrowhangConchoCongressCoolidgeCordes JunctionCordes LakesCornvilleCottonwoodCowlicCrown KingDatelandDesert HillsDeweyDolan SpringsDouglasDragoonDuncanDzilthnaodithhle SchoolEagarEdenEhrenbergEl MirageElfridaEloyFirst Mesa Consolidated VillagesFlagstaffFlorenceForest LakesFort DefianceFort HuachucaFort McdowellFort MohaveFort ValleyFountain HillsFredoniaFresnalFt. Wingate High SchoolGadsdenGila BendGilbertGiselaGlendaleGlobeGold CanyonGolden ValleyGoodyearGrand CanyonGreen ValleyGroom CreekGu Vo, Pia Oik, Menegers DamHappy JackHarquahala ValleyHaydenHeberHerefordHigleyHolbrookHopi High SchoolHopi Veterans CenterHotevillaHotevilla, Hotevilla/Bacavi Community ScHuachuca CityHualapaiHumboldtHunter EstatesJackrabbitJacob LakeJakes CornerJeromeJohnson RanchJoseph CityKaibab VillageKakaKatherine LandingKeams CanyonKearnyKingmanKirklandKohatkKohls RanchKykotsmoviKykotsmovi VillageLake Havasu CityLake MontezumaLakesideLaveenLibertyLindenLitchfield ParkLittlefieldLower MoencopiLower Sipaulovi, Lower MishongnoviLuke AFBLuke Air Force BaseLukevilleMagmaMammothMaranaMaricopaMartinez LakeMayerMc NealMcnaryMcNealMeadviewMerrian CraterMesaMesquite CityMiamiMiddle VerdeMoccasinMohave ValleyMohawkMorenciMormon LakeMorristownMount LemmonMunds ParkNacoNew FieldsNew RiverNogalesNorth RimNutriosoOak Creek CanyonOak Creek ValleyOatmanOracleOrgan Pipe NmOro ValleyOvergaardPagePalo VerdePalomaPalominasParadise ValleyParkerParker DamPatagoniaPatton Place EstatesPauldenPaysonPeach SpringsPearcePeeples ValleyPeoriaPeridotPhoenixPicachoPimaPinePinedalePinetopPioneerPirtlevillePisinemo, Santa Cruz, NestorsPolaccaPomerenePostonPrescottPrescott ValleyPunkin CenterQuartzsiteQueen CreekQueen's WellRancho WellRed RockRillitoRimrockRio RicoRio VerdeRock SpringsRollRooseveltRyan FieldSacatonSacaton, Sacaton Flats, Upper San Tan, BlSaffordSahuaritaSaint DavidSaint JohnsSalomeSalt River Indian CommunitySan CarlosSan LuisSan ManuelSan PedroSan SimonSan Tan ValleySan Xavier OrdSan Xavier WestSandersSanta Rosa Ranch, Sil NakyaSaugaro Acres/SurpriSchuchuligkScottsdaleSecond MesaSedonaSeligmanSellsSells, Big FieldsSherman PinesShow LowShungopaviSierra VistaSilverbellSix Mile and Steamboat VillageSnowflakeSolomonSomertonSonoitaSouth Komelic, Choulic, Cold Fields, TopSpring ValleySpringervilleSr Boarding School, Sr Subdivision, PaloSt DavidStanfieldStar ValleyStotonic, Goodyear, Gila Butte, SweetwatStrawberrySun CitySun City WestSun ValleySunizonaSunrise VistasSunsitesSupaiSuperiorSurpriseTacnaTaylorTempeThatcherThree PointsTollesonTombstoneTonopahTonto BasinTonto CreekTonto HillsTonto VillageTopockTorreon/Ojo Encino, New MexicoTown of Buckeye-SonoTruxtonTuba CityTubacTucsonTumacacoriTusayanUnknownUpper Cov Wells, Lower Cov Wells, SikulUpper MoenkopiUpper Sipaulovi, Upper MishongnoviVailValentineValentine, AzValleVamoriVaya Chin, Hickiwan, San Simon Village/SVentanaVernonVicksburgWaddellWelltonWendenWhite HillsWhite Mountain LakesWhite TanksWhiteriverWhyWickenburgWildhorse Pass Casino, St. Johns KomatkeWilhoitWillcoxWilliamsWillow BeachWindow RockWinkelmanWinslowWittmannWoodruffYarnellYoungtownYuccaYuma