All water systems in Arizona
1,713 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Phoenix City of Phoenix · Maricopa County |
1,695,000 | 2 | 0 | |
|
Tucson City of Tucson · Pima County |
732,906 | 3 | 0 | |
|
Mesa City of Mesa · Maricopa County |
466,000 | 3 | 0 | |
|
Gilbert, Town of Gilbert · Maricopa County |
247,600 | 9 | 1 | |
|
Chandler City of Chandler · Maricopa County |
247,328 | 4 | 0 | |
|
Scottsdale City of Scottsdale · Maricopa County |
241,361 | 2 | 0 | |
|
Glendale City of Glendale · Maricopa County |
234,766 | 3 | 0 | |
|
Peoria City of Peoria · Maricopa County |
187,676 | 4 | 1 | |
|
Tempe City of Tempe · Maricopa County |
165,000 | 0 | 0 | |
|
Arizona Water CO Pinal Valley Casa Grande · Pinal County |
134,432 | 2 | 0 | |
|
Epcor Agua Fria Surprise · Maricopa County |
128,040 | 5 | 0 | |
|
City of Yuma Yuma · Yuma County |
103,264 | 1 | 0 | |
|
Avondale City of Avondale · Maricopa County |
96,130 | 2 | 0 | |
|
Queen Creek Town of Queen Creek · Maricopa County |
95,502 | 1 | 0 | |
|
Epcor San Tan Johnson Ranch · Pinal County |
87,435 | 3 | 0 | |
|
GW Santa Cruz Water CO Maricopa · Pinal County |
84,000 | 7 | 0 | |
|
Flagstaff City of Flagstaff · Coconino County |
79,796 | 5 | 0 | |
|
Arizona Water CO Apache Junction Apache Junction · Pinal County |
62,055 | 0 | 0 | |
|
Liberty Water Lpsco Litchfield Park · Maricopa County |
57,070 | 1 | 0 | |
|
Town of Prescott Valley Prescott Valley · Yavapai County |
57,048 | 1 | 0 | |
|
Lake Havasu City of Lake Havasu City · Mohave County |
54,610 | 2 | 0 | |
|
Goodyear Water Department Goodyear · Maricopa County |
50,001 | 4 | 0 | |
|
University of Arizona Tucson · Pima County |
50,000 | 0 | 0 | |
|
Metropolitan Dwid Tucson · Pima County |
45,570 | 4 | 1 | |
|
Kingman Municipal Water Kingman · Mohave County |
45,000 | 2 | 0 | |
|
Oro Valley Water Utility Oro Valley · Pima County |
42,316 | 0 | 0 | |
|
Prescott City of Prescott · Yavapai County |
42,217 | 4 | 0 | |
|
Surprise City of Mountain Vista Surprise · Maricopa County |
40,007 | 1 | 0 | |
|
EL Mirage City of El Mirage · Maricopa County |
39,884 | 4 | 0 | |
|
San Luis City of San Luis · Yuma County |
39,705 | 4 | 1 | |
|
Epcor Sun City Sun City · Maricopa County |
38,016 | 0 | 0 | |
|
Bullhead City Mohave Bullhead City · Mohave County |
36,330 | 13 | 1 | |
|
Foothills Water and Sewer LLC Yuma · Yuma County |
32,425 | 5 | 0 | |
|
City of Buckeye Valencia Town Division Buckeye · Maricopa County |
30,377 | 3 | 1 | |
|
Epcor Chaparral City Fountain Hills · Maricopa County |
26,026 | 2 | 0 | |
|
Epcor Sun City West Sun City West · Maricopa County |
25,796 | 0 | 0 | |
|
Casino Arizona Talking Stick (cats) County |
25,785 | 0 | 0 | |
|
Bermuda Water Company INC Bullhead City · Mohave County |
25,000 | 4 | 0 | |
|
Desert Oasis Surprise · Maricopa County |
23,963 | 1 | 0 | |
|
Epcor Anthem Anthem · Maricopa County |
23,826 | 3 | 0 | |
|
Gric Dpw Wild Horse Pass Wildhorse Pass Casino, St. Johns Komatke · County |
22,795 | 2 | 0 | |
|
Community WC of Green Valley Green Valley · Pima County |
22,085 | 0 | 0 | |
|
Nogales City of Nogales · Santa Cruz County |
22,000 | 7 | 0 | |
|
City of Buckeye Sonora Sundance Town Of Buckeye-sono · Maricopa County |
21,405 | 2 | 0 | |
|
Salt River Public Works Salt River Indian Community · County |
20,951 | 0 | 0 | |
|
Safford City of Safford · Graham County |
20,600 | 5 | 1 | |
|
Bella Vista City Water System Sierra Vista · Cochise County |
20,045 | 1 | 0 | |
|
Pima Utilities Chandler · Maricopa County |
20,000 | 7 | 3 | |
|
Arizona Water CO White Tanks White Tanks · Maricopa County |
18,858 | 2 | 0 | |
|
Usaf Davis Monthan Afb Tucson · Pima County |
18,640 | 3 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Arizona records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.