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PFAS in Arizona drinking water

EPA's final UCMR 5 data covers 152 public water systems in Arizona, serving about 6.8 million people. PFAS turned up in 57 of them (38%). 23 averaged above at least one EPA limit at a sampling point, affecting about 857,620 people.

Highest PFOA and PFOS averages among systems serving 1,000 or more: City of Tempe (37.9 / 55.2 ppt), Town of Payson (39.7 / 36.9 ppt), Liberty Water Rio Rico (7.9 / 40.5 ppt), Marana Municipal - Marana (6.3 / 17.9 ppt) and Marana Municipal - Hartman Vistas (0.0 / 22.5 ppt).

Every tested system in Arizona

Largest first. PFOA and PFOS columns show the average at each system's worst sampling point; EPA's limit for each is 4 ppt. Filter by name:

Water system People PFOA PFOS PFAS found Result
City of Phoenix 1,695,000 - - 2 Below limits
City of Tucson 732,906 - - 1 Below limits
City of Mesa · Mesa 466,000 - - 3 Below limits
Town of Gilbert · Gilbert 247,600 3.2 7.7 6 Above limit
City of Chandler · Chandler 247,328 - - 4 Below limits
City of Scottsdale · Scottsdale 241,361 - - 1 Below limits
City of Glendale · Phoenix 234,766 - - 1 Below limits
City of Peoria · Peoria 187,676 2.8 - 3 Sample at limit
City of Tempe · Tempe 165,000 37.9 55.2 9 Above limit
Arizona Water CO - Pinal Valley · Phoenix 134,432 - - 6 Below limits
Epcor Water - Agua Fria · El Mirage 127,718 - - 0 None found
City of Yuma · Yuma 103,264 - - 0 None found
City of Avondale · Avondale 96,130 12.2 10.2 8 Above limit
Town of Queen Creek · Queen Creek 95,502 - - 0 None found
Epcor - San Tan · San Tan Valley 87,435 - - 0 None found
Gwr - Santa Cruz Water CO. INC. · Maricopa 84,000 - - 0 None found
City of Flagstaff · Flagstaff 79,796 - - 1 Below limits
Arizona Water CO - Apache Junction · Phoenix 62,055 - - 0 None found
Town of Prescott Valley · Dewey 57,048 - - 0 None found
Liberty Water Lpsco · Litchfield Park 55,810 10.2 11.8 8 Above limit
City of Lake Havasu · Lake Havasu City 54,610 - - 1 Below limits
Goodyear Water Department · Goodyear 50,001 4.4 7.5 6 Above limit
University of Arizona · Tucson 50,000 - - 3 Below limits
Metropolitan Dwid · Tucson 45,570 - - 2 Below limits
Kingman Municipal Water · Kingman 45,000 - - 0 None found
Oro Valley Water Utility · Oro Valley 42,316 - - 0 None found
City of Prescott · Prescott 42,217 10.7 8.3 7 Above limit
Surprise City of - Mountain Vista · Surprise 40,007 - - 0 None found
City of El Mirage · El Mirage 39,884 2.0 - 4 Sample at limit
City of San Luis · San Luis 39,705 - - 0 None found
Epcor Water - Sun City · El Mirage 38,016 - - 0 None found
Epcor Water - Mohave · Bullhead City 36,330 2.6 4.7 6 Above limit
Far West Water & Sewer INC · Yuma 32,425 - - 0 None found
City of Buckeye - Valencia Town Division 30,377 - - 0 None found
Epcor Water - Chaparral City · El Mirage 26,026 - - 0 None found
Epcor Water - Sun City West · El Mirage 25,796 - - 0 None found
Bermuda Water Company INC · Fort Mohave 25,000 - - 3 Below limits
Desert Oasis · Surprise 23,963 - - 0 None found
Epcor Water - Anthem · El Mirage 23,826 - - 0 None found
Community Wc of Green Valley · Green Valley 22,085 - - 0 None found
City of Nogales · Nogales 22,000 - - 0 None found
City of Safford · Safford 20,600 - - 2 Below limits
Bella Vista City Water System · Sierra Vista 20,045 - - 1 Below limits
Pima Utilities · Phoenix 20,000 - - 0 None found
AZ Water Co. - White Tanks · Phoenix 18,858 - - 1 Below limits
Usaf Davis Monthan Afb · Davis-monthan Afb 18,640 - - 0 None found
Sahuarita Water Company · Sahuarita 18,178 - - 0 None found
Lago Del Oro Water Company · Sun Lakes 18,132 - - 2 Below limits
Liberty Water Rio Rico · Sierra Vista 17,960 7.9 40.5 7 Above limit
Town of Payson · Payson 17,682 39.7 36.9 9 Above limit
Vail Water Company · Vail 17,500 - - 0 None found
City of Show Low · Show Low 17,139 - - 0 None found
City of Douglas · Douglas 16,656 - - 0 None found
Grand Canyon National Park · Grand Canyon 16,590 - - 0 None found
Flowing Wells Irrigation District · Tucson 16,000 5.0 5.0 6 Above limit
Florence Water Company · Florence 15,900 - - 3 Below limits
City of Buckeye Sonora - Sundance 15,783 - - 0 None found
Apache Junction Water District · Apache Junction 15,610 - - 0 None found
Us Army Fort Huachuca · Dragoon 15,603 6.6 6.2 6 Above limit
Marana Municipal - Marana · Marana 15,162 6.3 17.9 6 Above limit
Epcor Water - North East Agua Fria · El Mirage 14,723 - - 0 None found
City of Somerton · Somerton 14,197 - - 0 None found
Epcor Water - Paradise Valley/scottsdale · El Mirage 14,107 - - 0 None found
Arizona Water CO - Overgaard · Phoenix 13,797 - - 0 None found
Pueblo Del Sol Water Company · Sierra Vista 12,804 - - 0 None found
Arizona Water CO - Lakeside · Phoenix 12,191 - - 1 Below limits
Arizona Water CO - Sedona · Phoenix 12,104 9.7 5.2 8 Above limit
Cottonwood Municipal Water Cw1 · Cottonwood 11,023 - - 1 Below limits
Arizona Water CO - Oracle · Phoenix 10,585 - - 0 None found
Johnson Util - Anthem at Merrill Ranch · San Tan Valley 10,362 18.0 - 6 Above limit
Festival Ranch 10,313 - - 0 None found
Beardsley Water Company 1 · Litchfield Park 10,263 - - 0 None found
Tucson Water Corona De Tucson 10,217 - - 0 None found
City of Winslow · Winslow 9,789 - - 0 None found
City of Tolleson · Surprise 9,300 - - 2 Below limits
Arizona Water CO - Sierra Vista · Phoenix 9,175 - - 2 Below limits
Doney Park Water · Flagstaff 8,996 - - 0 None found
Cca - Eloy Complex · Eloy 8,852 - - 0 None found
Arizona Water CO - Bisbee · Phoenix 8,707 7.2 - 5 Above limit
Green Valley Dwid · Green Valley 8,687 - - 0 None found
Arizona Water CO - Miami Claypool · Phoenix 8,656 - - 6 Above limit
Usaf Luke Air Force Base · Luke Afb 8,440 9.7 11.5 7 Above limit
Usmc Yuma Main System · Yuma 8,353 - - 1 Below limits
Arizona Water CO - Pinewood · Phoenix 8,089 - - 0 None found
Pine Strawberry Dwid · Pine 8,013 - - 2 Below limits
City of Eloy · Eloy 7,903 - - 0 None found
City of Globe · Globe 7,536 - 9.4 5 Above limit
City of Page · Page 7,420 - - 0 None found
Big Park Water Company · Sedona 7,392 10.5 2.1 7 Above limit
City of Buckeye 7,008 - - 0 None found
Quail Creek Water Company · Tucson 6,812 - - 0 None found
Avra Water Coop INC · Tucson 6,685 - - 0 None found
Sunrise Water Company · Peoria 6,490 - - 0 None found
Town of Wickenburg · Wickenburg 6,481 - - 0 None found
Rose Valley Water Company · Yuma 6,202 - - 0 None found
Valley Pioneers Water Company INC · Golden Valley 6,063 - - 0 None found
Valley Utilities Water Company Glendale · Glendale 5,940 - - 4 Below limits
Cave Creek Water · Cave Creek 5,895 - - 0 None found
Farmers Water CO Continental · Maricopa 5,592 - - 0 None found
Town of Snowflake · Snowflake 5,590 - - 0 None found
Metropolitan Dwid - Diablo Village · Tucson 5,542 - - 0 None found
Ponderosa Dwid · Pinetop 5,375 - - 3 Below limits
Benson, City of Water System · Benson 5,355 - - 0 None found
Rio Verde Utilities · El Mirage 5,330 - - 0 None found
Marana Municipal - Picture Rocks · Tucson 5,278 - - 4 Below limits
Marana Municipal - Hartman Vistas · Tucson 5,248 - 22.5 2 Above limit
Epcor Water - North Mohave Valley · Bullhead City 5,190 - 5.2 5 Above limit
Camp Verde Water System · Camp Verde 5,013 - - 0 None found
Clarkdale Municipal Water System · Clarkdale 4,920 - - 0 None found
Epcor Water - Tierra Del Rio · El Mirage 4,868 - - 0 None found
City of Holbrook · Holbrook 4,833 - - 0 None found
Epcor Water - Lake Havasu · El Mirage 4,788 - - 0 None found
Arizona Water CO - San Manuel · Phoenix 4,748 - - 0 None found
Town of Eagar 4,590 - - 1 Below limits
Oro Valley Water Countryside · Oro Valley 4,534 - - 0 None found
Cottonwood Municipal Water Vv6 · Cottonwood 4,509 - - 0 None found
Phoenix International Raceway · Avondale 4,500 - 8.2 1 Above limit
Adoc Tucson · Tucson 4,500 - - 0 None found
Ray Water Company INC · Tucson 4,495 - - 0 None found
Arizona Water CO - Superior · Phoenix 4,393 - - 0 None found
Aspc Lewis Complex Water System · Buckeye 4,300 - - 0 None found
Metropolitan Dwid - Hub · Tucson 4,252 - - 0 None found
Desert Hills Water · Cave Creek 4,220 - - 0 None found
Aspc Yuma · Yuma 4,197 - - 0 None found
Morenci Water Elec CO Main · Phoenix 4,108 - - 2 Below limits
Farmers Water CO Santa Rita Springs · Maricopa 3,990 - 4.9 3 Above limit
Golden Shores Water Company · Williams 3,970 - - 0 None found
Adoc Eyman Unit · Phoenix 3,969 - - 0 None found
Golden Valley Improvement District · Kingman 3,950 - - 0 None found
Carefree Water Company · Carefree 3,894 - - 0 None found
Las Quintas Serenas Water Company · Maricopa 3,720 - - 0 None found
Arizona Water CO - Pinetop Lakes · Phoenix 3,513 - - 0 None found
City of St Johns · Saint Johns 3,500 - - 0 None found
Kachina Village Dwid · Flagstaff 3,500 - - 0 None found
Az State Prison - Geo Group - Kingman · Golden Valley 3,500 - - 0 None found
Arizona Water CO - Rimrock · Phoenix 3,423 - - 0 None found
Epcor Water - Willow Valley/king Street · El Mirage 3,408 - - 0 None found
City of Willcox · Willcox 3,236 - - 0 None found
Voyager Water Company · Tucson 3,209 - - 0 None found
U of a Science Tech Park · Tucson 3,000 - - 0 None found
Copper Mountain Ranch Cfd · Casa Grande 1,071 - - 0 None found
Adoc Florence Asp · Phoenix 1,001 - - 0 None found
Chino Valley High School · Chino Valley 960 - - 2 Below limits
Patagonia Water Department · Patagonia 819 - - 0 None found
Chino Valley School - Del Rio · Chino Valley 800 - - 1 Below limits
Tucson Country Day School · Tucson 800 - - 0 None found
Mission Palms Apartments · Tucson 720 - - 0 None found
Tierra Mesa Estates Water Company · Des Peres 632 - - 0 None found
Ponderosa Park Dwid · Prescott 602 3.5 2.4 6 Sample at limit
Glen Canyon Nra Wahweap · Page 579 - - 1 Below limits
Katherine Resorts Landing · La Jolla 58 - - 0 None found
Old Concho Water Users · Des Peres 40 - - 0 None found

On a private well in Arizona?

EPA's program only covers public systems. Private wells are never part of UCMR 5, so the only way to know is to test. Our well testing guide covers which lab tests to order, and the best well water systems covers what to install once you have results.

Cite this page

Well & Tap. "PFAS in Arizona drinking water: results for 152 systems." Data: U.S. EPA UCMR 5, final release August 2026. https://wellandtap.com/pfas/arizona/

Source: EPA UCMR 5 final occurrence data (August 2026); population from EPA SDWIS. Method.