Nitrate violations in Colorado
209 active public water systems in Colorado had a Nitrate violation in the past three years, 32 of them still unresolved. What Nitrate is and why it matters.
Systems with a Nitrate violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Chemical Materials Activity West Pueblo County |
3,000 | 8 | 0 | |
|
Sanborn Western Camps Teller County |
736 | 4 | 0 | |
|
Walsh Town of Baca County |
650 | 3 | 0 | |
|
Camp ID RA HA JE Park County |
522 | 2 | 0 | |
|
Worth the Drive Bakery Monte Vista · Rio Grande County |
392 | 2 | 1 | |
|
Britanie Ridge WS Elbert County |
245 | 1 | 0 | |
|
Acura 53 Commercial La Plata County |
202 | 1 | 0 | |
|
Genoa Town of Lincoln County |
153 | 9 | 1 | |
|
Lone Star School Washington County |
149 | 1 | 0 | |
|
Four Seasons RV Park Chaffee County |
122 | 1 | 0 | |
|
M Lazy C Ranch Lake George · Park County |
117 | 2 | 1 | |
|
Colorado Gators Alamosa County |
110 | 4 | 0 | |
|
Buena Vista Overlook Campground Chaffee County |
95 | 1 | 0 | |
|
Church at Woodmoor El Paso County |
85 | 1 | 0 | |
|
Asgard Subdivision WA Garfield County |
80 | 8 | 1 | |
|
Guffey Charter School Park County |
70 | 2 | 1 | |
|
San Luis Valley RV Resort Alamosa County |
66 | 2 | 0 | |
|
Two Buttes Town of Baca County |
64 | 9 | 3 | |
|
Heartwood CO OP Housing La Plata County |
60 | 9 | 1 | |
|
Fat Bbq Shack Park County |
53 | 2 | 1 | |
|
Stoneham Village Weld County |
51 | 2 | 0 | |
|
Shady Island Resort Gunnison County |
50 | 2 | 0 | |
|
Tarryall River Ranch Park County |
47 | 3 | 0 | |
|
Pitkin Hotel Gunnison County |
44 | 2 | 0 | |
|
Ajax Sleepaway Meredith · Eagle County |
43 | 1 | 0 | |
|
Seedorf WS Yuma County |
38 | 2 | 2 | |
|
Pacheco Trailer Park Rio Grande County |
36 | 13 | 3 | |
|
Rush Cafe El Paso County |
36 | 2 | 0 | |
|
Black Bear Retreat LLC Fremont County |
34 | 1 | 0 | |
|
Deep Creek Mountain Valley Estates Mineral County |
31 | 11 | 4 | |
|
Sweetwater River Resort Cotopaxi · Fremont County |
31 | 3 | 1 | |
|
Menkhaven Lodge on the Conejos Conejos County |
30 | 2 | 0 | |
|
Wellington Town of Larimer County |
11,720 | 5 | 0 | |
|
Grand County Water NO 1 Grand County |
5,400 | 11 | 0 | |
|
Battlement Mesa MD Garfield County |
4,100 | 6 | 0 | |
|
Royal Gorge Bridge CO of Colo Fremont County |
3,024 | 5 | 0 | |
|
Navajo State Park Archuleta County |
2,015 | 2 | 0 | |
|
Indian Hills WD Jefferson County |
1,300 | 5 | 1 | |
|
Mancos Rural Water Company Montezuma County |
1,300 | 10 | 5 | |
|
Julesburg Town of Sedgwick County |
1,225 | 4 | 1 | |
|
Ellicott Elem SR High School El Paso County |
1,114 | 7 | 1 | |
|
Winter Park Resort Vasquez Ridge Grand County |
999 | 1 | 0 | |
|
Manassa Town of Conejos County |
976 | 3 | 1 | |
|
Durango West MD NO 2 La Plata County |
930 | 2 | 1 | |
|
EL Paso Parks Fountain Creek A1 El Paso County |
800 | 1 | 0 | |
|
Durango la Plata Airport La Plata County |
780 | 8 | 0 | |
|
Centauri HS Centauri MS Conejos County |
700 | 6 | 1 | |
|
Mountain View at Rivers Edge RV Mineral County |
640 | 2 | 1 | |
|
Maroon Lake Pitkin County |
550 | 2 | 0 | |
|
Granada Town of Prowers County |
515 | 12 | 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. Retrieved from ECHO on Oct 11, 2026.