PFAS in Arizona tap water

24 of 152 tested systems measured above the federal limit. 57 had a detection of any kind.

Every public water system below was required by the EPA to test for 29 PFAS compounds. Sorted by the highest PFOA or PFOS reading, worst first. Find yours for the full set of readings and what removes them.

Water system	Highest PFOA	Highest PFOS	Found	Against the 4 ppt limit
Tempe City of	38.7 ppt	55.8 ppt	9 of 29	Above
Payson Town of	40.9 ppt	42.2 ppt	9 of 29	Above
Liberty Water Rio Rico	10 ppt	40.9 ppt	7 of 29	Above
Marana Municipal - Hartman Vistas	none detected	23 ppt	2 of 29	Above
Big Park Water Company	21 ppt	4.1 ppt	7 of 29	Above
Johnson Util - Anthem at Merrill Ranch	19 ppt	none detected	6 of 29	Above
Marana Municipal - Marana	6.3 ppt	17.9 ppt	6 of 29	Above
Liberty Water Lpsco	10.2 ppt	14.1 ppt	8 of 29	Above
City of Avondale	13.5 ppt	11.7 ppt	8 of 29	Above
Usaf Luke Air Force Base	10 ppt	11.7 ppt	7 of 29	Above
Prescott City of	11.4 ppt	8.7 ppt	7 of 29	Above
Arizona Water Co - Sedona	10 ppt	6 ppt	8 of 29	Above
Phoenix International Raceway	none detected	10 ppt	1 of 29	Above
Gilbert, Town of	6.5 ppt	9.8 ppt	6 of 29	Above
Arizona Water Co - Bisbee	9.7 ppt	none detected	5 of 29	Above
Globe City of	none detected	9.5 ppt	5 of 29	Above
Goodyear Water Department	4.8 ppt	7.9 ppt	6 of 29	Above
Epcor Water - Mohave	5.3 ppt	7.3 ppt	6 of 29	Above
Ponderosa Park Dwid	7 ppt	4.7 ppt	6 of 29	Above
US Army Fort Huachuca	7 ppt	6.5 ppt	6 of 29	Above
Flowing Wells Irrigation District	5 ppt	6 ppt	6 of 29	Above
Peoria City of	5.6 ppt	none detected	3 of 29	Above
Epcor Water - North Mohave Valley	none detected	5.5 ppt	5 of 29	Above
Farmers Water Co Santa Rita Springs	none detected	5 ppt	3 of 29	Above
El Mirage City of	4 ppt	none detected	4 of 29	Within
Adoc Eyman Unit	none detected	none detected	0 of 29	Within
Adoc Florence Asp	none detected	none detected	0 of 29	Within
Adoc Tucson	none detected	none detected	0 of 29	Within
Apache Junction Water District	none detected	none detected	0 of 29	Within
Arizona Water Co - Apache Junction	none detected	none detected	0 of 29	Within
Arizona Water Co - Lakeside	none detected	none detected	1 of 29	Within
Arizona Water Co - Miami Claypool	none detected	none detected	6 of 29	Within
Arizona Water Co - Oracle	none detected	none detected	0 of 29	Within
Arizona Water Co - Overgaard	none detected	none detected	0 of 29	Within
Arizona Water Co - Pinal Valley	none detected	none detected	6 of 29	Within
Arizona Water Co - Pinetop Lakes	none detected	none detected	0 of 29	Within
Arizona Water Co - Pinewood	none detected	none detected	0 of 29	Within
Arizona Water Co - Rimrock	none detected	none detected	0 of 29	Within
Arizona Water Co - San Manuel	none detected	none detected	0 of 29	Within
Arizona Water Co - Sierra Vista	none detected	none detected	2 of 29	Within
Arizona Water Co - Superior	none detected	none detected	0 of 29	Within
Aspc Lewis Complex Water System	none detected	none detected	0 of 29	Within
Aspc Yuma	none detected	none detected	0 of 29	Within
Avra Water Coop Inc	none detected	none detected	0 of 29	Within
Az State Prison - Geo Group - Kingman	none detected	none detected	0 of 29	Within
AZ Water Co. - White Tanks	none detected	none detected	1 of 29	Within
Beardsley Water Company 1	none detected	none detected	0 of 29	Within
Bella Vista City Water System	none detected	none detected	1 of 29	Within
Benson, City of Water System	none detected	none detected	0 of 29	Within
Bermuda Water Company Inc	none detected	none detected	3 of 29	Within
Buckeye City of	none detected	none detected	0 of 29	Within
Camp Verde Water System	none detected	none detected	0 of 29	Within
Carefree Water Company	none detected	none detected	0 of 29	Within
Cave Creek Water	none detected	none detected	0 of 29	Within
Cca - Eloy Complex	none detected	none detected	0 of 29	Within
Chandler City of	none detected	none detected	4 of 29	Within
Chino Valley High School	none detected	none detected	2 of 29	Within
Chino Valley School - Del Rio	none detected	none detected	1 of 29	Within
City of Buckeye - Valencia Town Division	none detected	none detected	0 of 29	Within
City of Buckeye Sonora - Sundance	none detected	none detected	0 of 29	Within
City of Lake Havasu	none detected	none detected	1 of 29	Within
City of Show Low	none detected	none detected	0 of 29	Within
City of Willcox	none detected	none detected	0 of 29	Within
Clarkdale Municipal Water System	none detected	none detected	0 of 29	Within
Community Wc of Green Valley	none detected	none detected	0 of 29	Within
Copper Mountain Ranch Cfd	none detected	none detected	0 of 29	Within
Cottonwood Municipal Water Cw1	none detected	none detected	1 of 29	Within
Cottonwood Municipal Water Vv6	none detected	none detected	0 of 29	Within
Desert Hills Water	none detected	none detected	0 of 29	Within
Desert Oasis	none detected	none detected	0 of 29	Within
Doney Park Water	none detected	none detected	0 of 29	Within
Douglas City of	none detected	none detected	0 of 29	Within
Eagar Town of	none detected	none detected	1 of 29	Within
Eloy City of	none detected	none detected	0 of 29	Within
Epcor - San Tan	none detected	none detected	0 of 29	Within
Epcor Water - Agua Fria	none detected	none detected	0 of 29	Within
Epcor Water - Anthem	none detected	none detected	0 of 29	Within
Epcor Water - Chaparral City	none detected	none detected	0 of 29	Within
Epcor Water - Lake Havasu	none detected	none detected	0 of 29	Within
Epcor Water - North East Agua Fria	none detected	none detected	0 of 29	Within
Epcor Water - Paradise Valley/scottsdale	none detected	none detected	0 of 29	Within
Epcor Water - Sun City	none detected	none detected	0 of 29	Within
Epcor Water - Sun City West	none detected	none detected	0 of 29	Within
Epcor Water - Tierra Del Rio	none detected	none detected	0 of 29	Within
Epcor Water - Willow Valley/king Street	none detected	none detected	0 of 29	Within
Far West Water & Sewer Inc	none detected	none detected	0 of 29	Within
Farmers Water Co Continental	none detected	none detected	0 of 29	Within
Festival Ranch	none detected	none detected	0 of 29	Within
Flagstaff City of	none detected	none detected	1 of 29	Within
Florence Water Company	none detected	none detected	3 of 29	Within
Glen Canyon Nra Wahweap	none detected	none detected	1 of 29	Within
Glendale City of	none detected	none detected	1 of 29	Within
Golden Shores Water Company	none detected	none detected	0 of 29	Within
Golden Valley Improvement District	none detected	none detected	0 of 29	Within
Grand Canyon National Park	none detected	none detected	0 of 29	Within
Green Valley Dwid	none detected	none detected	0 of 29	Within
Gwr - Santa Cruz Water Co. Inc.	none detected	none detected	0 of 29	Within
Holbrook City of	none detected	none detected	0 of 29	Within
Kachina Village Dwid	none detected	none detected	0 of 29	Within
Katherine Resorts Landing	none detected	none detected	0 of 29	Within
Kingman Municipal Water	none detected	none detected	0 of 29	Within
Lago Del Oro Water Company	none detected	none detected	2 of 29	Within
Las Quintas Serenas Water Company	none detected	none detected	0 of 29	Within
Marana Municipal - Picture Rocks	none detected	none detected	4 of 29	Within
Mesa City of	none detected	none detected	3 of 29	Within
Metropolitan Dwid	none detected	none detected	2 of 29	Within
Metropolitan Dwid - Diablo Village	none detected	none detected	0 of 29	Within
Metropolitan Dwid - Hub	none detected	none detected	0 of 29	Within
Mission Palms Apartments	none detected	none detected	0 of 29	Within
Morenci Water Elec Co Main	none detected	none detected	2 of 29	Within
Nogales City of	none detected	none detected	0 of 29	Within
Old Concho Water Users	none detected	none detected	0 of 29	Within
Oro Valley Water Countryside	none detected	none detected	0 of 29	Within
Oro Valley Water Utility	none detected	none detected	0 of 29	Within
Page City of	none detected	none detected	0 of 29	Within
Patagonia Water Department	none detected	none detected	0 of 29	Within
Phoenix City of	none detected	none detected	2 of 29	Within
Pima Utilities	none detected	none detected	0 of 29	Within
Pine Strawberry Dwid	none detected	none detected	2 of 29	Within
Ponderosa Dwid	none detected	none detected	3 of 29	Within
Pueblo Del Sol Water Company	none detected	none detected	0 of 29	Within
Quail Creek Water Company	none detected	none detected	0 of 29	Within
Queen Creek Town of	none detected	none detected	0 of 29	Within
Ray Water Company Inc	none detected	none detected	0 of 29	Within
Rio Verde Utilities	none detected	none detected	0 of 29	Within
Rose Valley Water Company	none detected	none detected	0 of 29	Within
Safford City of	none detected	none detected	2 of 29	Within
Sahuarita Water Company	none detected	none detected	0 of 29	Within
San Luis City of	none detected	none detected	0 of 29	Within
Scottsdale City of	none detected	none detected	1 of 29	Within
Snowflake Town of	none detected	none detected	0 of 29	Within
Somerton City of	none detected	none detected	0 of 29	Within
St Johns City of	none detected	none detected	0 of 29	Within
Sunrise Water Company	none detected	none detected	0 of 29	Within
Surprise City of - Mountain Vista	none detected	none detected	0 of 29	Within
Tierra Mesa Estates Water Company	none detected	none detected	0 of 29	Within
Tolleson City of	none detected	none detected	2 of 29	Within
Town of Prescott Valley	none detected	none detected	0 of 29	Within
Tucson City of	none detected	none detected	1 of 29	Within
Tucson Country Day School	none detected	none detected	0 of 29	Within
Tucson Water Corona de Tucson	none detected	none detected	0 of 29	Within
U of A Science Tech Park	none detected	none detected	0 of 29	Within
University of Arizona	none detected	none detected	3 of 29	Within
Usaf Davis Monthan Afb	none detected	none detected	0 of 29	Within
Usmc Yuma Main System	none detected	none detected	1 of 29	Within
Vail Water Company	none detected	none detected	0 of 29	Within
Valley Pioneers Water Company Inc	none detected	none detected	0 of 29	Within
Valley Utilities Water Company Glendale	none detected	none detected	4 of 29	Within
Voyager Water Company	none detected	none detected	0 of 29	Within
Wickenburg Town of	none detected	none detected	0 of 29	Within
Winslow City of	none detected	none detected	0 of 29	Within
Yuma City of	none detected	none detected	0 of 29	Within

All 152 systems the EPA tested in Arizona, every one of them with its own page. Each was tested for 29 PFAS compounds.

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Source, the EPA’s fifth Unregulated Contaminant Monitoring Rule, final dataset published 2026-10-15. Original data →