All water systems in Arizona
1,713 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sahuarita Water Company Sahuarita · Pima County |
18,178 | 0 | 0 | |
|
Lago del Oro Water Company Catalina · Pinal County |
18,132 | 2 | 0 | |
|
Liberty Water Rio Rico Rio Rico · Santa Cruz County |
17,960 | 3 | 0 | |
|
Payson Town of Payson · Gila County |
17,682 | 1 | 0 | |
|
Vail Water Company Tucson · Pima County |
17,500 | 0 | 0 | |
|
City of Show Low Show Low · Navajo County |
17,139 | 2 | 0 | |
|
Douglas City of Douglas · Cochise County |
16,656 | 2 | 0 | |
|
Grand Canyon National Park Grand Canyon · Coconino County |
16,590 | 7 | 0 | |
|
Flowing Wells Irrigation District Tucson · Pima County |
16,000 | 6 | 1 | |
|
Apache Junction Water District Apache Junction · Pinal County |
15,610 | 6 | 0 | |
|
US Army Fort Huachuca Fort Huachuca · Cochise County |
15,603 | 2 | 0 | |
|
Wmatua Miner Flat County |
15,570 | 6 | 1 | |
|
Marana Municipal Marana Marana · Pima County |
15,162 | 1 | 0 | |
|
Epcor North East Agua Fria Phoenix · Maricopa County |
14,723 | 2 | 0 | |
|
Florence Water Company Florence · Pinal County |
14,593 | 5 | 1 | |
|
Somerton City of Somerton · Yuma County |
14,197 | 2 | 0 | |
|
Epcor Paradise Valley/scottsdale Paradise Valley · Maricopa County |
14,107 | 2 | 0 | |
|
Arizona Water CO Overgaard Heber · Navajo County |
13,797 | 0 | 0 | |
|
Fort Defiance-Window Rock-St Michaels Ntua Fort Defiance, Window Rock, St. Michaels · County |
12,869 | 3 | 1 | |
|
Pueblo del Sol Water Company Sierra Vista · Cochise County |
12,804 | 4 | 0 | |
|
Arizona Water CO Lakeside Show Low · Navajo County |
12,191 | 0 | 0 | |
|
Arizona Water CO Sedona Sedona · Coconino County |
12,104 | 1 | 0 | |
|
Talking Stick Resort Salt River Indian Community · County |
12,087 | 0 | 0 | |
|
Ak-Chin Village Ak-chin Village · County |
11,646 | 6 | 1 | |
|
Cottonwood Municipal Water CW1 Cottonwood · Yavapai County |
11,288 | 0 | 0 | |
|
Beardsley Water Company 1 Surprise · Maricopa County |
10,881 | 1 | 0 | |
|
Casino Arizona Salt River Indian Community · County |
10,603 | 0 | 0 | |
|
Arizona Water CO Oracle Oracle · Pinal County |
10,585 | 0 | 0 | |
|
Epcor San Tan Anthem Johnson Ranch · Pinal County |
10,362 | 2 | 0 | |
|
Festival Ranch Buckeye · Maricopa County |
10,313 | 1 | 0 | |
|
Tucson Water Corona de Tucson Tucson · Pima County |
10,217 | 0 | 0 | |
|
City of Buckeye Tartesso Water System Buckeye · Maricopa County |
10,123 | 2 | 0 | |
|
Winslow City of Winslow · Navajo County |
9,789 | 4 | 2 | |
|
Tolleson City of Tolleson · Maricopa County |
9,300 | 4 | 0 | |
|
Arizona Water CO Sierra Vista Sierra Vista · Cochise County |
9,233 | 1 | 0 | |
|
Doney Park Water Flagstaff · Coconino County |
9,222 | 1 | 1 | |
|
Eloy City of Eloy · Pinal County |
8,999 | 6 | 1 | |
|
Cca Eloy Complex Eloy · Pinal County |
8,852 | 3 | 0 | |
|
Green Valley Dwid Green Valley · Pima County |
8,687 | 3 | 1 | |
|
Arizona Water CO Miami Claypool Miami · Gila County |
8,616 | 1 | 0 | |
|
Arizona Water CO Bisbee Bisbee · Cochise County |
8,590 | 2 | 0 | |
|
Scua Upper Seven Mile County |
8,478 | 12 | 3 | |
|
Chinle-Many Farms-Del Muerto Ntua Chinle, Many Farms, Del Muerto · County |
8,458 | 0 | 0 | |
|
Usaf Luke Air Force Base Litchfield Park · Maricopa County |
8,440 | 2 | 0 | |
|
Usmc Yuma Main System Yuma · Yuma County |
8,353 | 6 | 0 | |
|
Arizona Water CO Pinewood Munds Park · Coconino County |
8,115 | 0 | 0 | |
|
Pine Strawberry Wid Pine · Gila County |
8,013 | 1 | 1 | |
|
Buckeye City of Buckeye · Maricopa County |
7,998 | 2 | 0 | |
|
San Tan Mountain Casino Temporary Water System County |
7,990 | 2 | 0 | |
|
Globe City of Globe · Gila County |
7,536 | 4 | 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.