Surface Water Treatment Rule (SWTR) violations in Colorado
284 active public water systems in Colorado had a Surface Water Treatment Rule (SWTR) violation in the past three years, 50 of them in the latest quarter of EPA's data. What Surface Water Treatment Rule (SWTR) is and why it matters.
Systems with a Surface Water Treatment Rule (SWTR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Golden Eagle Ranch El Paso County |
53 | 3 | 0 | |
|
Cdot Eisenhower Johnson Tunnel Clear Creek County |
50 | 4 | 0 | |
|
Cragmont WC Jefferson County |
50 | 2 | 0 | |
|
Pinon Wsd Trinidad · Las Animas County |
50 | 3 | 0 | |
|
Cattle Creek Wua Garfield County |
47 | 3 | 0 | |
|
Rancho del Rio Eagle County |
43 | 4 | 0 | |
|
Hill Top General Store Larimer County |
42 | 5 | 0 | |
|
Red Feather Super Market Larimer County |
41 | 2 | 0 | |
|
Van Den Berg MD La Plata County |
41 | 5 | 0 | |
|
Historic Pines Ranch Custer County |
39 | 5 | 1 | |
|
Glen Echo Resort Larimer County |
38 | 5 | 1 | |
|
Red Feather Mountain Library District Larimer County |
38 | 1 | 0 | |
|
Inn of Glen Haven Larimer County |
37 | 5 | 0 | |
|
Cotopaxi Store Fremont County |
36 | 1 | 0 | |
|
Stucker Mesa Domestic WC Delta County |
36 | 5 | 1 | |
|
Hidden Valley Ranch Pagosa Springs · Archuleta County |
34 | 2 | 0 | |
|
Sunset Lake Summer Home Owners Mesa County |
32 | 3 | 0 | |
|
Euzoa Bible Church Routt County |
31 | 3 | 0 | |
|
Lake San Cristobal HOA Hinsdale County |
30 | 3 | 0 | |
|
Iron Clad Modular Home Park Moffat County |
30 | 3 | 0 | |
|
Mesa Mobile Park La Plata County |
30 | 5 | 1 | |
|
Camp V Montrose County |
29 | 6 | 0 | |
|
Quartz Creek Property Owners Association Gunnison County |
29 | 3 | 0 | |
|
Echo Basin Ranch Montezuma County |
27 | 5 | 0 | |
|
Sundance Trail Guest Ranch Larimer County |
27 | 5 | 0 | |
|
Alpine Mountain Ranch MD Routt County |
25 | 3 | 0 | |
|
Rifle Creek Pure Water LLC Garfield County |
25 | 2 | 0 | |
|
Stallion Infrastructure Services Garfield County |
25 | 2 | 0 | |
|
Telluride Pines HOA San Miguel County |
25 | 8 | 0 | |
|
Well on Wheels Water Hauler La Plata County |
25 | 4 | 1 | |
|
Mountain View Water Larimer County |
24 | 2 | 0 | |
|
Cabins on Spring Creek Subdivision Gunnison County |
15 | 2 | 0 | |
|
Fountain Valley Authority El Paso County |
13 | 2 | 0 | |
|
Mustang Water Authority Montrose County |
0 | 7 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Surface Water Treatment Rule (SWTR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Surface Water Treatment Rule (SWTR) 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.