All water systems in Colorado
2,218 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lyons Town of Boulder County |
2,990 | 0 | 0 | |
|
Aspen Ski Corp HI Alpine L9 Pitkin County |
2,900 | 2 | 0 | |
|
Platteville Town of Weld County |
2,900 | 0 | 0 | |
|
Cripple Creek City of Teller County |
2,817 | 2 | 0 | |
|
Upper Surface Creek Domestic Wua Delta County |
2,800 | 3 | 0 | |
|
Colorado City MD Pueblo County |
2,755 | 8 | 4 | |
|
Molson Coors Beverage Company Jefferson County |
2,725 | 1 | 0 | |
|
Palmer Lake Town of El Paso County |
2,686 | 4 | 0 | |
|
Buffalo Mountain MD Summit County |
2,650 | 0 | 0 | |
|
Aspen Ski Corp Garrett Gulch Pitkin County |
2,630 | 0 | 0 | |
|
Center Town of Saguache County |
2,575 | 3 | 1 | |
|
Holyoke City of Phillips County |
2,540 | 2 | 2 | |
|
East Dillon WD Summit County |
2,501 | 3 | 0 | |
|
Monarch Ski Area Chaffee County |
2,500 | 0 | 0 | |
|
North Pecos Wsd Adams County |
2,500 | 0 | 0 | |
|
South Sheridan Water and Sewer Dist Jefferson County |
2,500 | 0 | 0 | |
|
Steamboat Ski Corp Rendezvous Routt County |
2,500 | 0 | 0 | |
|
Wikiup MHP Adams County |
2,500 | 2 | 1 | |
|
Paonia Town of Delta County |
2,499 | 2 | 0 | |
|
Rangely Town of Rio Blanco County |
2,495 | 3 | 0 | |
|
Rangeview MD Arapahoe County |
2,487 | 3 | 0 | |
|
Eastern Adams CO MD Adams County |
2,485 | 0 | 0 | |
|
Alameda Wsd Jefferson County |
2,480 | 0 | 0 | |
|
Meeker Town of Rio Blanco County |
2,473 | 0 | 0 | |
|
Crested Butte Town of Gunnison County |
2,440 | 1 | 0 | |
|
Nederland Town of Boulder County |
2,406 | 0 | 0 | |
|
Cedaredge Town of Delta County |
2,400 | 0 | 0 | |
|
Eldora Mountain Resort Boulder County |
2,400 | 1 | 0 | |
|
Silverton Town of San Juan County |
2,387 | 2 | 0 | |
|
Akron Town of Washington County |
2,379 | 2 | 0 | |
|
Basalt Town of Eagle County |
2,357 | 0 | 0 | |
|
Conifer High School Jefferson County |
2,350 | 2 | 0 | |
|
Wray City of Yuma County |
2,342 | 4 | 2 | |
|
Spring Canyon Wsd Larimer County |
2,320 | 0 | 0 | |
|
Bayfield Town of La Plata County |
2,300 | 0 | 0 | |
|
Granby Town of South Service Area Grand County |
2,300 | 1 | 0 | |
|
Keystone Lodge IV Summit County |
2,268 | 0 | 0 | |
|
Flagler Town of Kit Carson County |
2,160 | 1 | 0 | |
|
Fraser Town of Grand County |
2,150 | 1 | 0 | |
|
Las Animas City of Bent County |
2,139 | 1 | 1 | |
|
Poncha Springs Town of Chaffee County |
2,118 | 1 | 0 | |
|
Kersey WD Weld County |
2,101 | 1 | 0 | |
|
Aerie Summit County |
2,077 | 0 | 0 | |
|
Cdot NO Name Rest Area Garfield County |
2,058 | 1 | 0 | |
|
Hotchkiss Town of Delta County |
2,050 | 4 | 0 | |
|
Strasburg Wsd Adams County |
2,050 | 3 | 0 | |
|
Wolf Creek Ski Corp Mineral County |
2,050 | 0 | 0 | |
|
Grand Lake Town of Grand County |
2,035 | 0 | 0 | |
|
Granby Town of North Service Area Grand County |
2,025 | 2 | 0 | |
|
Towaoc Water System County |
2,020 | 5 | 2 |
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.