All water systems in Colorado
2,218 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Crestview Wsd Adams County |
23,756 | 0 | 0 | |
|
Windsor Town of Weld County |
23,500 | 0 | 0 | |
|
Meridian MD Douglas County |
23,415 | 3 | 0 | |
|
Cherry Creek Valley Wsd Denver County |
22,000 | 0 | 0 | |
|
Louisville City of Boulder County |
20,975 | 1 | 0 | |
|
Tri County Wcd Montrose County |
20,490 | 0 | 0 | |
|
Left Hand WD Boulder County |
20,280 | 0 | 0 | |
|
Security Water District El Paso County |
20,000 | 1 | 0 | |
|
Wheat Ridge Water District Jefferson County |
20,000 | 0 | 0 | |
|
Platte Canyon Wsd Arapahoe County |
19,485 | 0 | 0 | |
|
Evans City of Weld County |
19,369 | 2 | 0 | |
|
Montrose City of Montrose County |
19,305 | 1 | 1 | |
|
MT Werner WD Routt County |
19,000 | 3 | 0 | |
|
Willows WD Arapahoe County |
19,000 | 0 | 0 | |
|
Woodmoor Wsd El Paso County |
18,031 | 1 | 0 | |
|
Superior MD NO 1 Boulder County |
17,900 | 0 | 0 | |
|
Frederick Town of Weld County |
17,173 | 2 | 2 | |
|
US Air Force Academy El Paso County |
16,876 | 0 | 0 | |
|
Estes Park Town of Larimer County |
16,722 | 1 | 0 | |
|
North Weld County WD Weld County |
15,890 | 0 | 0 | |
|
Evergreen MD Jefferson County |
15,750 | 0 | 0 | |
|
Stonegate MD Douglas County |
15,295 | 0 | 0 | |
|
Gypsum Town of Eagle County |
15,272 | 2 | 0 | |
|
Black Hawk City of Gilpin County |
15,167 | 0 | 0 | |
|
Sterling City of Logan County |
15,100 | 1 | 0 | |
|
North Washington Street Wsd Adams County |
14,500 | 0 | 0 | |
|
Berthoud Town of Larimer County |
14,211 | 0 | 0 | |
|
Woodmen Hills MD El Paso County |
13,888 | 0 | 0 | |
|
Montezuma WC Montezuma County |
13,797 | 3 | 1 | |
|
Roxborough Wsd Douglas County |
13,765 | 0 | 0 | |
|
Pinery Wwd Douglas County |
12,901 | 1 | 0 | |
|
Castle Pines North MD Douglas County |
12,800 | 1 | 0 | |
|
Meridian Service MD El Paso County |
12,760 | 2 | 0 | |
|
FT Lupton City of Weld County |
12,099 | 3 | 1 | |
|
FT Morgan City of Morgan County |
12,000 | 1 | 0 | |
|
Ken Caryl Wsd Jefferson County |
12,000 | 0 | 0 | |
|
Lakehurst Wsd Jefferson County |
12,000 | 0 | 0 | |
|
Severance Town of Weld County |
11,733 | 2 | 0 | |
|
Wellington Town of Larimer County |
11,720 | 5 | 0 | |
|
Federal Heights City of Adams County |
11,678 | 0 | 0 | |
|
Sterling Ranch Cab Douglas County |
11,501 | 2 | 0 | |
|
Trinidad City of Las Animas County |
11,400 | 2 | 0 | |
|
Alamosa City of Alamosa County |
11,271 | 0 | 0 | |
|
Pagosa Area Wsd Archuleta County |
11,069 | 0 | 0 | |
|
Cottonwood Wsd Douglas County |
10,867 | 7 | 0 | |
|
Idaho Springs City of Clear Creek County |
10,432 | 3 | 0 | |
|
North Table Mountain Wsd Jefferson County |
10,000 | 0 | 0 | |
|
Valley WD Jefferson County |
10,000 | 0 | 0 | |
|
Steamboat Springs City of Routt County |
9,950 | 1 | 1 | |
|
Snake River WD Summit County |
9,900 | 2 | 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.