Browse
Pick a state to see every utility we cover there, or jump to the largest. Pages exist for 1298 utilities (the biggest by population among systems with complete PFAS testing), 150 counties and 52 states and territories. The full dataset is downloadable, including systems without their own page.
States and territories
Alabama291 systems with full PFAS testingAlaska23 systems with full PFAS testingArizona131 systems with full PFAS testingArkansas151 systems with full PFAS testingCalifornia600 systems with full PFAS testingColorado146 systems with full PFAS testingConnecticut56 systems with full PFAS testingDelaware32 systems with full PFAS testingDistrict of Columbia3 systems with full PFAS testingFlorida356 systems with full PFAS testingGeorgia228 systems with full PFAS testingHawaii42 systems with full PFAS testingIdaho52 systems with full PFAS testingIllinois436 systems with full PFAS testingIndiana205 systems with full PFAS testingIowa129 systems with full PFAS testingKansas87 systems with full PFAS testingKentucky217 systems with full PFAS testingLouisiana244 systems with full PFAS testingMaine35 systems with full PFAS testingMaryland71 systems with full PFAS testingMassachusetts252 systems with full PFAS testingMichigan286 systems with full PFAS testingMinnesota179 systems with full PFAS testingMississippi196 systems with full PFAS testingMissouri202 systems with full PFAS testingMontana31 systems with full PFAS testingNebraska41 systems with full PFAS testingNevada35 systems with full PFAS testingNew Hampshire43 systems with full PFAS testingNew Jersey231 systems with full PFAS testingNew Mexico62 systems with full PFAS testingNew York279 systems with full PFAS testingNorth Carolina250 systems with full PFAS testingNorth Dakota32 systems with full PFAS testingOhio304 systems with full PFAS testingOklahoma140 systems with full PFAS testingOregon113 systems with full PFAS testingPennsylvania324 systems with full PFAS testingPuerto Rico89 systems with full PFAS testingRhode Island26 systems with full PFAS testingSouth Carolina144 systems with full PFAS testingSouth Dakota41 systems with full PFAS testingTennessee265 systems with full PFAS testingTexas1009 systems with full PFAS testingUtah118 systems with full PFAS testingVermont31 systems with full PFAS testingVirginia144 systems with full PFAS testingWashington216 systems with full PFAS testingWest Virginia84 systems with full PFAS testingWisconsin178 systems with full PFAS testingWyoming28 systems with full PFAS testing
Largest utilities
New York City SystemNY · 8,271,000 peopleLos Angeles-City, dept. of Water & PowerCA · 3,875,566 peopleCity of HoustonTX · 2,970,543 peopleChicagoIL · 2,721,308 peopleSan Antonio Water SystemTX · 2,643,729 peopleMDWASA - Main SystemFL · 2,377,460 peopleWashington Suburban Sanitary CommissionMD · 1,900,000 peoplePhoenix City ofAZ · 1,695,000 peopleCity of BaltimoreMD · 1,600,000 peoplePhiladelphia Water departmentPA · 1,600,000 peopleLas Vegas Valley Water DistrictNV · 1,539,277 peopleEast Bay MudCA · 1,468,000 peopleSan Diego, City ofCA · 1,408,937 peopleDallas Water UtilityTX · 1,356,479 peopleColumbus Public Water SystemOH · 1,309,468 peopleCleveland Public Water SystemOH · 1,308,955 peopleDenver Water BoardCO · 1,287,000 peopleCharlotte WaterNC · 1,206,285 peopleSeattle Public UtilitiesWA · 1,161,961 peopleFairfax County Water AuthorityVA · 1,121,613 peopleCity of Austin Water & WastewaterTX · 1,115,323 peopleMo American St Louis St Charles CountiesMO · 1,111,000 peopleSuffolk County Water AuthorityNY · 1,100,000 peopleAtlantaGA · 1,089,893 people
Counties
Harris County, TX242 systemsLos Angeles County, CA109 systemsCook County, IL106 systemsFort Bend County, TX62 systemsMiddlesex County, MA53 systemsSan Bernardino County, CA44 systemsWorcester County, MA42 systemsMaricopa County, AZ41 systemsWayne County, MI41 systemsKing County, WA39 systemsMontgomery County, TX39 systemsOakland County, MI39 systemsLake County, IL35 systemsNassau County, NY33 systemsMorris County, NJ33 systemsEssex County, MA31 systemsDuPage County, IL30 systemsRiverside County, CA29 systemsOrange County, CA29 systemsPierce County, WA28 systemsBroward County, FL28 systemsSacramento County, CA27 systemsOcean County, NJ27 systemsTarrant County, TX26 systems