Nitrate violations in Colorado
209 active public water systems in Colorado had a Nitrate violation in the past three years, 32 of them in the latest quarter of EPA's data. What Nitrate is and why it matters.
Systems with a Nitrate violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sundance Trail Guest Ranch Larimer County |
27 | 5 | 0 | |
|
Fire Mountain Programs Larimer County |
26 | 2 | 1 | |
|
Galbraith Estates Arapahoe County |
26 | 3 | 0 | |
|
Glen Isle Resort Park County |
26 | 1 | 0 | |
|
Colo Agricultural Leadership Foundation Douglas County |
25 | 2 | 0 | |
|
Travel Port CG Park County |
25 | 3 | 1 | |
|
Mineral Farms Wua Ouray County |
24 | 4 | 0 | |
|
Moffat Town of Saguache County |
12 | 11 | 4 | |
|
Mustang Water Authority Montrose County |
0 | 7 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrate, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrate alone.
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 Colorado 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.