Oklahoma tap water quality
901 active community water systems.
Largest water systems
| Grade | System | People | Health violations (5y) |
|---|
| A | Oklahoma City Utilities | 644,000 | 0 |
| A | City of Tulsa Water and Sewer Department | 413,000 | 0 |
| B | Broken Arrow Municipal Authority | 116,330 | 0 |
| B | Norman Utilities Authority | 104,868 | 1 |
| A | Lawton | 92,757 | 0 |
| B | Edmond Pwa | 79,408 | 0 |
| B | Midwest City | 55,935 | 0 |
| D | Moore Public Works Authority | 55,083 | 4 |
| D | Stillwater Utilities Authority | 53,000 | 6 |
| C | Enid | 49,347 | 1 |
| D | Muskogee Municipal Authority | 38,310 | 5 |
| F | Wagoner Co. Rwd #4 | 37,658 | 32 |
| B | Bartlesville | 34,748 | 1 |
| A | Oklahoma University | 34,000 | 0 |
| D | Shawnee Municipal Authority | 29,990 | 5 |
| A | Sand Springs | 28,774 | 0 |
| B | Ponca City Mun Water | 27,155 | 0 |
| A | Washington Co Rwd #3 (New, #1) | 25,375 | 0 |
| B | Ardmore | 24,893 | 1 |
| B | Tinker Air Force Base | 24,645 | 0 |
| B | Owasso | 23,000 | 1 |
| D | Duncan Public Utilities Authority | 23,000 | 5 |
| A | Fort Sill Hqusafacfs | 23,000 | 0 |
| B | Ada | 22,600 | 1 |
| A | Yukon | 22,498 | 0 |
| B | Del City | 22,128 | 1 |
| C | Bethany | 20,307 | 1 |
| C | Sapulpa | 19,702 | 3 |
| B | Bixby Public Works Authority | 18,750 | 1 |
| D | Altus | 18,717 | 20 |
| C | City of Mustang | 18,576 | 1 |
| D | McAlester Pwa | 18,206 | 17 |
| D | Marshall County Rural Water District #2 | 17,587 | 41 |
| A | Jenks Pwa | 16,924 | 0 |
| D | El Reno | 16,212 | 5 |
| D | Chickasha Municipal Authority | 16,036 | 6 |
| D | Claremore | 15,873 | 5 |
| C | Durant Utilities Authority | 15,545 | 2 |
| C | Woodward | 15,000 | 1 |
| C | Tahlequah Pwa | 14,458 | 3 |
| A | Miami | 13,704 | 0 |
| D | Okmulgee Pwa | 13,495 | 21 |
| C | Sequoyah Co. Rwd #8 | 13,460 | 2 |
| C | Osu Water Plant | 13,000 | 3 |
| D | Creek Co Rwd # 2 | 12,788 | 5 |
| A | Glenpool Water | 12,500 | 0 |
| A | Rogers Co Rwd # 5 | 11,782 | 0 |
| C | Guymon | 11,442 | 1 |
| D | Southern Okla Water Corp | 11,250 | 41 |
| B | Weatherford | 10,833 | 0 |
Most issues (systems serving 10,000+)
F32 health-based violations in the last 5 years; 3 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOS; Lead 90th percentile below the action level (2024).
D6 health-based violations in the last 5 years; PFOA/PFOS average above the 4 ppt federal limit: PFOS; Lead 90th percentile below the action level (2025).
D4 health-based violations in the last 5 years; 55 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D20 health-based violations in the last 5 years; 11 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
D21 health-based violations in the last 5 years; 11 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D16 health-based violations in the last 5 years; 14 monitoring/reporting violations; 8 not yet resolved; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D5 health-based violations in the last 5 years; 6 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
D17 health-based violations in the last 5 years; 5 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D6 health-based violations in the last 5 years; 5 monitoring/reporting violations; 2 not yet resolved; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
D5 health-based violations in the last 5 years; 4 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
D5 health-based violations in the last 5 years; 4 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
D5 health-based violations in the last 5 years; 2 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D41 health-based violations in the last 5 years; 2 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
D5 health-based violations in the last 5 years; 2 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D5 health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
D41 health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
C3 health-based violations in the last 5 years; 3 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
C3 health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).
C3 health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).
C2 health-based violations in the last 5 years; 6 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
Cities
AchilleAdaAdairAdamsAddingtonAftonAgraAlbanyAlbionAldersonAlexAlineAllenAltusAltus AfbAlvaAmberAmesAmoritaAnadarkoAntlersApacheArapahoArcadiaArdmoreArkomaArnettAsherAtokaAtwoodAvantBarnsdallBartlesvilleBeggsBenningtonBessieBethanyBig CabinBillingsBingerBisonBixbyBlackwellBlairBlanchardBlancoBluejacketBoise CityBokchitoBokosheBoleyBoswellBowlegsBoyntonBradleyBraggsBramanBristowBroken ArrowBroken BowBromideBuffaloBunchBurbankBurlingtonBurneyvilleBurns FlatButlerByarsCacheCaddoCaleraCalumetCalvinCamargoCameronCanadianCaneyCantonCanuteCarmenCarnegieCarneyCarterCartwrightCashionCastleCatoosaCementCentrahomaChandlerChattanoogaChecotahChelseaCherokeeCheyenneChickashaChoctawChouteauClaremoreClaritaClaytonCleo SpringsClevelandClintonCoalgateColbertColcordColemanCollinsvilleColonyComancheCommerceCooksonCopanCordellCornCouncil HillCovingtonCowetaCoyleCrawfordCrescentCromwellCrowderCushingCuster CityCyrilDacomaDavenportDavidsonDavisDeer CreekDelawareDepewDevolDeweyDill CityDisneyDoughertyDouglasDoverDrummondDrumrightDukeDuncanDurantDustinEagletownEaklyEarlsboroEdmondEl RenoEldoradoElginElk CityElmerElmore CityEnidErickEuchaEufaulaFairfaxFairlandFairmontFairviewFanshaweFargoFaxonFinleyFittstownFitzhughFletcherForganFort CobbFort GibsonFort SillFort SupplyFossFosterFoyilFrancisFrederickFreedomGageGansGarberGarvinGateGearyGene AutryGeronimoGlencoeGlenpoolGoldenGoltryGoodwellGoreGoteboGouldGracemontGrandfieldGraniteGrantGreenfieldGroveGuthrieGuymonHaileyvilleHallettHammonHannaHardestyHarrahHartshorneHaskellHastingsHaworthHeadrickHealdtonHeavenerHelenaHendrixHennepinHennesseyHenryettaHillsdaleHintonHitchcockHitchitaHobartHodgenHoldenvilleHollisHollisterHominyHookerHopetonHoweHugoHulbertHunterHydroIdabelIndiahomaIndianolaInolaJayJenksJenningsJetJonesKaw CityKellyvilleKempKeneficKeotaKetchumKeyesKieferKingfisherKingstonKintaKiowaKonawaKrebsKremlinLahomaLamarLamontLaneLangleyLangstonLaverneLawtonLebanonLeedeyLefloreLehighLenapahLeonLequireLexingtonLindsayLocoLocust GroveLone GroveLone WolfLongdaleLookebaLovelandLoyalLucienLutherMacombMadillManchesterMangumManitouMannfordMannsvilleMaramecMarble CityMariettaMarlandMarlowMarshallMarthaMaudMaysvilleMcalesterMccurtainMcloudMeadMedfordMedicine ParkMeekerMenoMiamiMilburnMill CreekMillertonMincoMoffettMoorelandMorrisMorrisonMoundsMountain ParkMountain ViewMuldrowMulhallMuseMuskogeeMustangMutualNardinNashNashobaNewallaNewcastleNewkirkNicoma ParkNinnekahNobleNormanNorth MiamiNowataOakhurstOaksOakwoodOchelataOiltonOkarcheOkayOkeeneOkemahOklahoma CityOkmulgeeOktahaOlusteeOmegaOologahOrlandoOsageOverbrookOwassoPadenPanamaPaoliPark HillPauls ValleyPawhuskaPawneePeggsPerkinsPerryPicherPiedmontPittsburgPlatterPocassetPocolaPonca CityPond CreekPorterPorumPoteauPraguePrestonProctorPruePryorPurcellPutnamQuapawQuintonRalstonRamonaRandlettRatliff CityRaviaRed OakRed RockRedbirdRentiesvilleReydonRinglingRingoldRingwoodRipleyRockyRoffRolandRooseveltRufeRush SpringsRyanS CoffeyvilleSalinaSallisawSand SpringsSapulpaSasakwaSavannaSawyerSayreSchulterSeilingSeminoleSentinelShady PointSharonShattuckShawneeShidlerSkiatookSlickSmithvilleSnyderSoperSparksSpavinawSpencerSpencervilleSperrySpiroSpringerSterlingStiglerStillwaterStilwellStonewallStrangStratfordStringtownStroudStuartSulphurSwinkTaftTahlequahTalalaTalihinaTalogaTatumsTecumsehTempleTerltonTerralTexhomaThackervilleThomasTiptonTishomingoTonkawaTryonTulsaTupeloTurpinTuskahomaTuttleTyroneUnion CityValliantVelmaVeraVerdenVianViciVinitaWagonerWainwrightWakitaWaltersWanetteWannWapanuckaWardvilleWarnerWashingtonWatongaWattsWaukomisWaurikaWayneWaynokaWeatherfordWebbers FallsWeleetkaWellingWellstonWestvilleWetumkaWewokaWheatlandWhitefieldWhitesboroWilburtonWillowWilsonWisterWoodwardWright CityWyandotteWynnewoodWynonaYaleYukon