Arizona Drinking Water Violations
1,729Water Systems
76,771Total Violations
6,330Health-Based
Arizona has 1,729 active public water systems regulated under the EPA's Safe Drinking Water Act. Across these systems, there have been 6,330 health-based violations out of 76,771 total violations recorded. Currently, 146 water systems have unresolved health-based violations.
The most frequently cited health-based contaminants in Arizona are Unknown, Unknown, and Unknown. Health-based violations mean a water system exceeded an EPA maximum contaminant level (MCL) or failed required treatment standards.
Browse the counties below to find specific water systems, or search by address or ZIP code to find your water provider.
Counties
| County | Water Systems | Total Violations | Health-Based |
|---|---|---|---|
| Yuma County | 51 | 5,896 | 1,134 |
| Pinal County | 94 | 6,691 | 953 |
| Yavapai County | 237 | 7,300 | 840 |
| Mohave County | 119 | 7,736 | 446 |
| La Paz County | 82 | 3,343 | 386 |
| Cochise County | 104 | 4,092 | 298 |
| Pima County | 195 | 7,283 | 230 |
| Maricopa County | 215 | 8,326 | 224 |
| Gila County | 103 | 4,154 | 221 |
| Coconino County | 115 | 3,901 | 216 |
| Navajo County | 63 | 3,624 | 132 |
| Santa Cruz County | 37 | 2,176 | 87 |
| Apache County | 47 | 1,933 | 68 |
| Greenlee County | 11 | 1,064 | 54 |
| Graham County | 16 | 969 | 24 |