Colorado Drinking Water Violations
2,267Water Systems
59,011Total Violations
7,439Health-Based
Colorado has 2,267 active public water systems regulated under the EPA's Safe Drinking Water Act. Across these systems, there have been 7,439 health-based violations out of 59,011 total violations recorded. Currently, 91 water systems have unresolved health-based violations.
The most frequently cited health-based contaminants in Colorado 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 |
|---|---|---|---|
| Park County | 2 | 95 | 49 |
| Chaffee County | 7 | 96 | 38 |
| Eagle County | 5 | 58 | 23 |
| Archuleta County | 3 | 56 | 17 |
| Fremont County | 2 | 73 | 13 |
| La Plata County | 10 | 28 | 6 |
| Delta County | 7 | 224 | 5 |
| Adams County | 10 | 125 | 5 |
| Broomfield County | 1 | 8 | 5 |
| Huerfano County | 1 | 8 | 3 |
| Douglas County | 4 | 540 | 2 |
| El Paso County | 10 | 115 | 2 |
| Las Animas County | 4 | 101 | 2 |
| Jefferson County | 3 | 25 | 2 |
| Costilla County | 1 | 100 | 1 |
| Denver County | 1 | 50 | 1 |
| Boulder County | 3 | 31 | 1 |
| Montezuma County | 2 | 24 | 1 |
| Arapahoe County | 5 | 75 | 0 |
| Mesa County | 1 | 37 | 0 |
| Montrose County | 3 | 37 | 0 |
| Crowley County | 1 | 21 | 0 |
| Pueblo County | 2 | 20 | 0 |
| Larimer County | 3 | 17 | 0 |
| Garfield County | 3 | 16 | 0 |
| Rio Grande County | 4 | 16 | 0 |
| Grand County | 3 | 13 | 0 |
| Weld County | 2 | 13 | 0 |
| Alamosa County | 3 | 10 | 0 |
| Clear Creek County | 2 | 9 | 0 |
| Pitkin County | 2 | 9 | 0 |
| Gunnison County | 2 | 7 | 0 |
| Moffat County | 1 | 6 | 0 |
| Teller County | 1 | 3 | 0 |
| Elbert County | 1 | 2 | 0 |
| Conejos County | 1 | 0 | 0 |