State system profile

PFAS in Arizona drinking water

Active community water systems with complete EPA UCMR 5 monitoring, summarized using yearly averages from results available through January 15, 2026.

Source EPA UCMR 5 Period 2023–2025 Systems included 151 Release ucmr5-2026-01-15-analysis-v0.2
Systems with a yearly average at or above an EPA-based study benchmark
13.9%21 of 151 active community water systems

All 151 systems had enough required samples to calculate a yearly average. 21 had at least one yearly average at or above a study benchmark; 130 did not.

EPA-based study benchmark: the unrounded cutoff this research uses to reproduce EPA’s January 2026 technical-assistance classification around the April 2024 federal levels. It is not a current standard or compliance finding and cannot determine household exposure or health risk.

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Compound summary

System counts in Arizona

Each count shows how many included water systems had a yearly average at or above the named study benchmark.

Community water systems with yearly averages at or above the EPA-based study benchmarks used in the January 2026 research release for Arizona.
Study benchmarkSystems at or above benchmarkWater systems includedPercent
PFOA: 4.05 ppt study benchmark (reproduces EPA classification around 4 ppt)151519.9%
PFOS: 4.05 ppt study benchmark (reproduces EPA classification around 4 ppt)1815111.9%
PFHxS: 15 ppt study benchmark (reproduces EPA classification around 10 ppt)41512.6%
PFNA: 15 ppt study benchmark (reproduces EPA classification around 10 ppt)01510.0%
HFPO-DA: 15 ppt study benchmark (reproduces EPA classification around 10 ppt)01510.0%
Hazard Index: 1.5 study benchmark with at least two detected components (reproduces EPA classification around 1)41512.6%
System directory

Community water systems with complete monitoring

“Complete monitoring” means at least one sampling location had all required samples needed for a yearly average. Each PWSID appears once, preventing double counting across ZIP associations.

Active community water systems with complete UCMR 5 monitoring in Arizona.
Public water systemPWSIDPopulation servedPrimary sourceSampling locationsStudy benchmark result
ADOC EYMAN UNITAZ04117053,969Ground water1Below all study benchmarks
ADOC FLORENCE ASPAZ04110661,001Ground water2Below all study benchmarks
ADOC TUCSONAZ04205574,500Ground water1Below all study benchmarks
ARIZONA WATER CO - APACHE JUNCTIONAZ041100462,055Ground water2Below all study benchmarks
ARIZONA WATER CO - BISBEEAZ04020018,707Ground water1At or above a study benchmark
ARIZONA WATER CO - LAKESIDEAZ040900312,191Ground water5Below all study benchmarks
ARIZONA WATER CO - MIAMI CLAYPOOLAZ04040028,656Ground water11Below all study benchmarks
ARIZONA WATER CO - ORACLEAZ041101910,585Ground water4Below all study benchmarks
ARIZONA WATER CO - OVERGAARDAZ040900413,797Ground water5Below all study benchmarks
ARIZONA WATER CO - PINAL VALLEYAZ0411009134,432Ground water10Below all study benchmarks
ARIZONA WATER CO - PINETOP LAKESAZ04090183,513Ground water1Below all study benchmarks
ARIZONA WATER CO - PINEWOODAZ04030028,089Ground water3Below all study benchmarks
ARIZONA WATER CO - RIMROCKAZ04130463,423Ground water5Below all study benchmarks
ARIZONA WATER CO - SAN MANUELAZ04110204,748Ground water purchased1Below all study benchmarks
ARIZONA WATER CO - SEDONAAZ040300312,104Ground water8At or above a study benchmark
ARIZONA WATER CO - SIERRA VISTAAZ04020049,175Ground water7Below all study benchmarks
ARIZONA WATER CO - SUPERIORAZ04110214,393Ground water1Below all study benchmarks
ASPC LEWIS COMPLEX WATER SYSTEMAZ04075554,300Ground water1Below all study benchmarks
ASPC YUMAAZ04140994,197Ground water1Below all study benchmarks
AVRA WATER COOP INCAZ04100066,685Ground water2Below all study benchmarks
AZ STATE PRISON - GEO GROUP - KINGMANAZ04081843,500Ground water1Below all study benchmarks
AZ Water Co. - White TanksAZ040712818,858Surface water purchased4Below all study benchmarks
Ak Chin Village09040009011,646Surface water1Below all study benchmarks
BEARDSLEY WATER COMPANY 1AZ040700710,263Ground water3Below all study benchmarks
BELLA VISTA CITY WATER SYSTEMAZ040201020,045Ground water15Below all study benchmarks
BENSON, CITY OF WATER SYSTEMAZ04020055,355Ground water4Below all study benchmarks
BERMUDA WATER COMPANY INCAZ040806325,000Ground water9Below all study benchmarks
BIA Truxton Agency09040006316Ground water1Below all study benchmarks
BIG PARK WATER COMPANYAZ04130127,392Ground water5At or above a study benchmark
BUCKEYE CITY OFAZ04070897,008Ground water1Below all study benchmarks
CAMP VERDE WATER SYSTEMAZ04130155,013Ground water1Below all study benchmarks
CAREFREE WATER COMPANYAZ04070153,894Surface water purchased2Below all study benchmarks
CCA - ELOY COMPLEXAZ04111158,852Ground water2Below all study benchmarks
CHANDLER CITY OFAZ0407090247,328Surface water27Below all study benchmarks
CITY OF BUCKEYE - VALENCIA TOWN DIVISIONAZ040707830,377Ground water1Below all study benchmarks
CITY OF BUCKEYE SONORA - SUNDANCEAZ040715415,783Ground water2Below all study benchmarks
CITY OF SHOW LOWAZ040902617,139Ground water10Below all study benchmarks
CITY OF WILLCOXAZ04020353,236Ground water1Below all study benchmarks
CLARKDALE MUNICIPAL WATER SYSTEMAZ04130244,920Ground water2Below all study benchmarks
COMMUNITY WC OF GREEN VALLEYAZ041000422,085Ground water4Below all study benchmarks
COPPER MOUNTAIN RANCH CFDAZ04113281,071Ground water1Below all study benchmarks
COTTONWOOD MUNICIPAL WATER CW1AZ041302511,023Ground water5Below all study benchmarks
COTTONWOOD MUNICIPAL WATER VV6AZ04131064,509Ground water6Below all study benchmarks
City of AvondaleAZ040708896,130Surface water purchased6At or above a study benchmark
City of Lake HavasuAZ040802254,610Ground water1Below all study benchmarks
Colorado River Regional Water System0904000513,476Ground water1Below all study benchmarks
DESERT HILLS WATERAZ04070264,220Surface water purchased2Below all study benchmarks
DONEY PARK WATERAZ04030058,996Ground water7Below all study benchmarks
DOUGLAS CITY OFAZ040201416,656Ground water6Below all study benchmarks
EAGAR TOWN OFAZ04010044,590Ground water6Below all study benchmarks
EL MIRAGE CITY OFAZ040709139,884Ground water9Below all study benchmarks
ELOY CITY OFAZ04110307,903Ground water2Below all study benchmarks
EPCOR - SAN TANAZ041112887,435Ground water7Below all study benchmarks
EPCOR WATER - AGUA FRIAAZ0407695127,718Surface water9Below all study benchmarks
EPCOR WATER - ANTHEMAZ040750423,826Surface water1Below all study benchmarks
EPCOR WATER - CHAPARRAL CITYAZ040701726,026Surface water3Below all study benchmarks
EPCOR WATER - MOHAVEAZ040803236,330Ground water6At or above a study benchmark
EPCOR WATER - NORTH EAST AGUA FRIAAZ040753114,723Ground water2Below all study benchmarks
EPCOR WATER - NORTH MOHAVE VALLEYAZ04080685,190Ground water2At or above a study benchmark
EPCOR WATER - PARADISE VALLEY/SCOTTSDALEAZ040705614,107Surface water purchased1Below all study benchmarks
EPCOR WATER - SUN CITYAZ040709938,016Ground water7Below all study benchmarks
EPCOR WATER - SUN CITY WESTAZ040715025,796Ground water2Below all study benchmarks
EPCOR WATER - TIERRA DEL RIOAZ04075324,868Ground water1Below all study benchmarks
EPCOR WATER - WILLOW VALLEY/KING STREETAZ04080403,408Ground water1Below all study benchmarks
FAR WEST WATER & SEWER INCAZ041400432,425Surface water5Below all study benchmarks
FARMERS WATER CO CONTINENTALAZ04100495,592Ground water3Below all study benchmarks
FARMERS WATER CO SANTA RITA SPRINGSAZ04102133,990Ground water1At or above a study benchmark
FLAGSTAFF CITY OFAZ040300879,796Surface water10Below all study benchmarks
FLORENCE WATER COMPANYAZ041101715,900Ground water4Below all study benchmarks
FLOWING WELLS IRRIGATION DISTRICTAZ041005116,000Ground water6At or above a study benchmark
Fort Defiance-Window Rock-St Michaels NTUANN040300012,869Ground water7Below all study benchmarks
GILBERT, TOWN OFAZ0407092247,600Surface water19At or above a study benchmark
GLEN CANYON NRA WAHWEAPAZ0403712579Ground water1Below all study benchmarks
GLENDALE CITY OFAZ0407093234,766Surface water8Below all study benchmarks
GLOBE CITY OFAZ04040087,536Ground water3At or above a study benchmark
GOLDEN VALLEY IMPROVEMENT DISTRICTAZ04080813,950Ground water2Below all study benchmarks
GOODYEAR WATER DEPARTMENTAZ040709450,001Surface water6At or above a study benchmark
GRIC DPW Sacaton0904000475,307Ground water3Below all study benchmarks
GRIC DPW Wild Horse Pass09040069222,795Ground water2Below all study benchmarks
GWR - SANTA CRUZ WATER CO. INC.AZ041113184,000Ground water2Below all study benchmarks
Ganado-Burnside-Cornfield-Steamboat NTUANN04030013,947Ground water3Below all study benchmarks
Greasewood Springs Community Boarding School BIANN0436008720Ground water1Below all study benchmarks
HOLBROOK CITY OFAZ04090154,833Ground water3Below all study benchmarks
JOHNSON UTIL - ANTHEM AT MERRILL RANCHAZ041113610,362Ground water2At or above a study benchmark
KACHINA VILLAGE DWIDAZ04030133,500Ground water3Below all study benchmarks
KATHERINE RESORTS LANDINGAZ040801858Ground water1Below all study benchmarks
KINGMAN MUNICIPAL WATERAZ040802045,000Ground water7Below all study benchmarks
Kayenta NTUANN04030033,844Ground water7Below all study benchmarks
LAGO DEL ORO WATER COMPANYAZ041111718,132Ground water13Below all study benchmarks
LAS QUINTAS SERENAS WATER COMPANYAZ04100643,720Ground water2Below all study benchmarks
LIBERTY WATER LPSCOAZ040704655,810Ground water7At or above a study benchmark
LIBERTY WATER RIO RICOAZ041201117,960Ground water6At or above a study benchmark
MARANA MUNICIPAL - HARTMAN VISTASAZ04103295,248Ground water3At or above a study benchmark
MARANA MUNICIPAL - MARANAAZ041015015,162Ground water2At or above a study benchmark
MARANA MUNICIPAL - PICTURE ROCKSAZ04100925,278Ground water1Below all study benchmarks
MESA CITY OFAZ0407095466,000Surface water31Below all study benchmarks
METROPOLITAN DWIDAZ041007645,570Ground water21Below all study benchmarks
METROPOLITAN DWID - DIABLO VILLAGEAZ04103575,542Ground water2Below all study benchmarks
METROPOLITAN DWID - HUBAZ04100604,252Ground water5Below all study benchmarks
MISSION PALMS APARTMENTSAZ0420570720Ground water1Below all study benchmarks
NOGALES CITY OFAZ041200422,000Ground water5Below all study benchmarks
ORO VALLEY WATER COUNTRYSIDEAZ04101754,534Ground water1Below all study benchmarks
ORO VALLEY WATER UTILITYAZ041016442,316Ground water14Below all study benchmarks
PAGE CITY OFAZ04030177,420Surface water1Below all study benchmarks
PATAGONIA WATER DEPARTMENTAZ0412006819Ground water1Below all study benchmarks
PAYSON TOWN OFAZ040403217,682Ground water25At or above a study benchmark
PEORIA CITY OFAZ0407096187,676Surface water17Below all study benchmarks
PHOENIX CITY OFAZ04070251,695,000Surface water21Below all study benchmarks
PIMA UTILITIESAZ040712020,000Ground water3Below all study benchmarks
PINE STRAWBERRY DWIDAZ04040348,013Ground water12Below all study benchmarks
PONDEROSA DWIDAZ04090235,375Ground water5Below all study benchmarks
PRESCOTT CITY OFAZ041304542,217Ground water4At or above a study benchmark
PUEBLO DEL SOL WATER COMPANYAZ040204412,804Ground water4Below all study benchmarks
Pinon-District 4 NTUANN04030045,195Ground water4Below all study benchmarks
Polacca0904001063,890Ground water purchased1Below all study benchmarks
QUEEN CREEK TOWN OFAZ040703395,502Ground water19Below all study benchmarks
Quechan Utility0904000895,660Ground water2Below all study benchmarks
RAY WATER COMPANY INCAZ04100954,495Ground water3Below all study benchmarks
RIO VERDE UTILITIESAZ04071215,330Ground water1Below all study benchmarks
ROSE VALLEY WATER COMPANYAZ04070656,202Ground water1Below all study benchmarks
SAFFORD CITY OFAZ040500520,600Ground water6Below all study benchmarks
SAHUARITA WATER COMPANYAZ041031218,178Ground water1Below all study benchmarks
SAN LUIS CITY OFAZ041400539,705Ground water6Below all study benchmarks
SCOTTSDALE CITY OFAZ0407098241,361Surface water7Below all study benchmarks
SCUA Upper Seven Mile0904001148,478Ground water4Below all study benchmarks
SNOWFLAKE TOWN OFAZ04090295,590Ground water3Below all study benchmarks
SOMERTON CITY OFAZ041401514,197Ground water1Below all study benchmarks
ST JOHNS CITY OFAZ04010123,500Ground water1Below all study benchmarks
SUNRISE WATER COMPANYAZ04070706,490Ground water3Below all study benchmarks
SURPRISE CITY OF - MOUNTAIN VISTAAZ040750040,007Ground water4Below all study benchmarks
Salt River Public Works09040010920,951Ground water2Below all study benchmarks
Sells Intertie0904000424,000Ground water1Below all study benchmarks
TEMPE CITY OFAZ0407100165,000Surface water10At or above a study benchmark
TIERRA MESA ESTATES WATER COMPANYAZ0414080632Ground water1Below all study benchmarks
TOLLESON CITY OFAZ04071019,300Surface water purchased3Below all study benchmarks
TOWN OF PRESCOTT VALLEYAZ041304857,048Ground water19Below all study benchmarks
TUCSON CITY OFAZ0410112732,906Ground water83Below all study benchmarks
TUCSON WATER CORONA DE TUCSONAZ041016910,217Ground water3Below all study benchmarks
Tuba City NTUANN04002066,276Ground water1Below all study benchmarks
US ARMY FORT HUACHUCAAZ040207815,603Ground water5At or above a study benchmark
USAF DAVIS MONTHAN AFBAZ042054918,640Ground water5Below all study benchmarks
USAF LUKE AIR FORCE BASEAZ04073058,440Surface water purchased4At or above a study benchmark
USMC YUMA MAIN SYSTEMAZ04140828,353Surface water1Below all study benchmarks
VAIL WATER COMPANYAZ041004117,500Ground water1Below all study benchmarks
VALLEY PIONEERS WATER COMPANY INCAZ04080386,063Ground water1Below all study benchmarks
VALLEY UTILITIES WATER COMPANY GLENDALEAZ04070795,940Ground water4Below all study benchmarks
Vaya Chin Intertie0904000201,151Ground water2Below all study benchmarks
WICKENBURG TOWN OFAZ04070456,481Ground water5Below all study benchmarks
WINSLOW CITY OFAZ04090359,789Ground water1Below all study benchmarks
WMATUA Miner Flat09040069315,570Surface water2Below all study benchmarks
YUMA CITY OFAZ0414024103,264Surface water2Below all study benchmarks
How the count works

What is included

Each active community water system with enough required samples for a yearly average is counted once, even if it is linked with several ZIP codes. This does not mean every home was tested. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system. This page does not apply Arizona's state-specific standards or determine compliance. Use the official state or territory drinking-water program for current regulatory information.

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Related links

PFAS Estimator system lookupNational state comparison tableFull methodology and limitationsCurrent EPA UCMR 5 Data FinderOfficial state and territory drinking-water programs