All water systems in Colorado
2,218 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Winter Park Resort Lunch Rock Grand County |
5,001 | 1 | 0 | |
|
Winter Park Resort Snoasis Grand County |
5,001 | 2 | 0 | |
|
Paint Brush Hills El Paso County |
4,994 | 0 | 0 | |
|
Northern Colorado WA Larimer County |
4,675 | 0 | 0 | |
|
Keenesburg Town of Weld County |
4,650 | 0 | 0 | |
|
Monte Vista City of Rio Grande County |
4,600 | 0 | 0 | |
|
Mid Valley MD Eagle County |
4,588 | 0 | 0 | |
|
Elizabeth Town of Elbert County |
4,523 | 0 | 0 | |
|
Menoken WD Montrose County |
4,500 | 0 | 0 | |
|
Frisco Town of Summit County |
4,495 | 2 | 1 | |
|
Csu Foothills Campus Larimer County |
4,483 | 2 | 0 | |
|
Rocky Ford City of Otero County |
4,443 | 1 | 0 | |
|
Bennett Town of Adams County |
4,400 | 2 | 0 | |
|
Glendale City of Glendale · Arapahoe County |
4,400 | 1 | 0 | |
|
Ault Town of Weld County |
4,220 | 2 | 0 | |
|
Battlement Mesa MD Garfield County |
4,100 | 6 | 0 | |
|
Yuma City of Yuma County |
4,049 | 6 | 2 | |
|
High View WD Jefferson County |
4,000 | 0 | 0 | |
|
Park Center WD Fremont County |
4,000 | 0 | 0 | |
|
West Fort Collins WD Larimer County |
4,000 | 0 | 0 | |
|
Hayden Town of Routt County |
3,982 | 4 | 0 | |
|
Genesee Wsd Jefferson County |
3,920 | 0 | 0 | |
|
Perry Park Wsd Douglas County |
3,890 | 3 | 0 | |
|
Chipeta WD Montrose County |
3,802 | 0 | 0 | |
|
Buena Vista Town of Chaffee County |
3,776 | 1 | 0 | |
|
Central City City of Gilpin County |
3,750 | 4 | 0 | |
|
YMCA Rockies Wind River Larimer County |
3,730 | 7 | 2 | |
|
Burlington City of Kit Carson County |
3,720 | 1 | 1 | |
|
Colorado Centre MD El Paso County |
3,675 | 0 | 0 | |
|
Silt Town of Garfield County |
3,536 | 3 | 0 | |
|
Advenir French Quarter Denver · Denver County |
3,447 | 2 | 1 | |
|
Hudson Town of Weld County |
3,350 | 2 | 1 | |
|
Cdot Vail Pass RA Summit County |
3,302 | 0 | 0 | |
|
Fall River Pass Larimer County |
3,300 | 1 | 0 | |
|
Mount Crested Butte Wsd Gunnison County |
3,296 | 1 | 0 | |
|
Meadowbrook WD Jefferson County |
3,290 | 0 | 0 | |
|
Dillon Town of Summit County |
3,254 | 1 | 0 | |
|
Winter Park Ranch Wsd Grand County |
3,250 | 0 | 0 | |
|
Keystone Summit Lodge Summit County |
3,241 | 2 | 0 | |
|
Walsenburg City of Huerfano County |
3,230 | 6 | 2 | |
|
Longs Peak WD Boulder County |
3,200 | 0 | 0 | |
|
Mesa Verde National Park Montezuma County |
3,177 | 0 | 0 | |
|
Penrose WD Fremont County |
3,149 | 0 | 0 | |
|
Orchard City Town of Delta County |
3,100 | 4 | 0 | |
|
Animas WC La Plata County |
3,096 | 0 | 0 | |
|
Dillon Valley District Summit County |
3,063 | 2 | 0 | |
|
Palisade Town of Mesa County |
3,060 | 1 | 0 | |
|
Royal Gorge Bridge CO of Colo Fremont County |
3,024 | 5 | 0 | |
|
Olathe Town of Montrose County |
3,015 | 1 | 0 | |
|
Chemical Materials Activity West Pueblo County |
3,000 | 8 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
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.