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 |
|---|---|---|---|---|
|
Saguache Town of Saguache County |
504 | 9 | 1 | |
|
Grizzly Peak Water Sales San Juan County |
503 | 4 | 1 | |
|
Ptarmigan Warming Hut Clear Creek County |
500 | 1 | 0 | |
|
Eureka WC Otero County |
498 | 9 | 1 | |
|
Telluride Regional Airport San Miguel County |
485 | 4 | 1 | |
|
Valley Maint Corp NO 1 Teller County |
470 | 7 | 2 | |
|
Sargent Elem and New High School RE33 Rio Grande County |
426 | 4 | 0 | |
|
Steamboat Lake WD Routt County |
411 | 5 | 0 | |
|
Ramah in the Rockies Jefferson County |
405 | 1 | 0 | |
|
Stagecoach State Park Routt County |
405 | 4 | 0 | |
|
EL Paso Parks Fountain Creek Nature Ctr El Paso County |
400 | 1 | 0 | |
|
Gardner Water and Sanitation Dist Huerfano County |
400 | 7 | 2 | |
|
Camp Cedaredge Delta County |
367 | 3 | 1 | |
|
Cuttys Hayden Creek Resort Fremont County |
364 | 2 | 0 | |
|
Encompass Preschool Parker · Douglas County |
364 | 7 | 2 | |
|
Rifle Gap State Park Garfield County |
356 | 3 | 0 | |
|
Baxter Water and Services Pueblo County |
350 | 10 | 0 | |
|
Dinosaur Town of Moffat County |
350 | 6 | 1 | |
|
Navigators Eagle Lake Camp El Paso County |
340 | 3 | 0 | |
|
Valley Investment Properties Garfield County |
320 | 2 | 1 | |
|
Timber Creek WD Summit County |
312 | 1 | 0 | |
|
Alvarado CG 4122 Custer County |
300 | 6 | 0 | |
|
Aspen Village MD Pitkin County |
300 | 8 | 0 | |
|
Ranch at Roaring Fork Garfield County |
300 | 6 | 1 | |
|
Strawberry Park Hot Springs Routt County |
300 | 2 | 0 | |
|
Cavanaugh Hills WS Adams County |
286 | 1 | 0 | |
|
Jamestown Town of Boulder County |
280 | 7 | 1 | |
|
Gunsmoke Travel Plaza Chaffee County |
268 | 1 | 0 | |
|
Florissant Wsd Teller County |
250 | 9 | 0 | |
|
Mesa Antero Subd Chaffee County |
250 | 3 | 1 | |
|
Tagawa Greenhouses INC Weld County |
250 | 1 | 0 | |
|
Monarch Mountain Lodge Chaffee County |
247 | 14 | 5 | |
|
Mountaindale CG and Cabins Fremont County |
228 | 8 | 0 | |
|
Sky Ranch Lutheran Camp Larimer County |
226 | 2 | 1 | |
|
Woody Creek Metropolitan District Pitkin County |
220 | 5 | 1 | |
|
Monarch Crest Salida · Chaffee County |
210 | 1 | 0 | |
|
Hesperus Baptist Camp INC La Plata County |
206 | 5 | 0 | |
|
Arrowhead Point Chaffee County |
204 | 3 | 2 | |
|
Roadhouse Bar and Grill Grand County |
204 | 2 | 0 | |
|
Centerville Pit Stop Chaffee County |
203 | 3 | 0 | |
|
Sugar Loafin RV Campground Lake County |
201 | 3 | 1 | |
|
Roaring Fork MHP Pitkin County |
200 | 10 | 0 | |
|
Bethune Town of Kit Carson County |
195 | 6 | 1 | |
|
Sugarbush Campground and Liquor Store Fremont County |
190 | 2 | 0 | |
|
Altman Plants El Paso County |
188 | 8 | 1 | |
|
South Fork CG Rio Grande County |
176 | 2 | 0 | |
|
Deserado Mine Rio Blanco County |
175 | 4 | 0 | |
|
Arickaree School Washington County |
165 | 3 | 1 | |
|
Grand Mesa Christian Assn Camp Delta County |
161 | 3 | 1 | |
|
Camp Santa Maria WC Park County |
160 | 4 | 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.