Chlorine (MRDL) violations in Colorado
230 active public water systems in Colorado had a Chlorine (MRDL) violation in the past three years, 38 of them in the latest quarter of EPA's data. What Chlorine (MRDL) is and why it matters.
Systems with a Chlorine (MRDL) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
San Juan Ranch Estates Association, INC Hinsdale County |
67 | 2 | 0 | |
|
Pinewood Mobile Home Park Larimer County |
65 | 3 | 0 | |
|
Two Buttes Town of Baca County |
64 | 9 | 3 | |
|
Cherry Valley Elem School Douglas County |
60 | 3 | 0 | |
|
Cottonwood MHP Adams County |
60 | 3 | 0 | |
|
Dinosaur Natl Mnt Hdqtrs Moffat County |
55 | 6 | 1 | |
|
Haswell Town of Kiowa County |
55 | 5 | 0 | |
|
Chris Park CG La Plata County |
54 | 3 | 0 | |
|
Cross L Estates Rio Blanco County |
50 | 3 | 0 | |
|
Pinon Wsd Trinidad · Las Animas County |
50 | 3 | 0 | |
|
Dunton Hot Springs INC Dolores County |
47 | 3 | 0 | |
|
Western Metals Recycling Englewood · Arapahoe County |
45 | 7 | 0 | |
|
Phillips Mobile Home Park Pitkin County |
44 | 3 | 1 | |
|
Valley View Park Mobile Home Community Custer County |
44 | 4 | 0 | |
|
Van Den Berg MD La Plata County |
41 | 5 | 0 | |
|
Eastside MHP Chaffee County |
40 | 5 | 0 | |
|
Triangle TP La Plata County |
39 | 2 | 0 | |
|
TV Hills Water Custer County |
38 | 5 | 1 | |
|
Stucker Mesa Domestic WC Delta County |
36 | 5 | 1 | |
|
Lake Sanchez Estates Costilla County |
34 | 5 | 1 | |
|
Eagle Roost Water Improvement Assoc Chaffee County |
33 | 2 | 0 | |
|
Deep Creek Mountain Valley Estates Mineral County |
31 | 11 | 4 | |
|
Iron Clad Modular Home Park Moffat County |
30 | 3 | 0 | |
|
Hidden Springs Ranch Routt County |
27 | 7 | 0 | |
|
Ranch at Coulter Creek HOA Garfield County |
27 | 10 | 0 | |
|
E-470 Water System Plaza D Adams County |
25 | 5 | 0 | |
|
Telluride Pines HOA San Miguel County |
25 | 8 | 0 | |
|
Well on Wheels Water Hauler La Plata County |
25 | 4 | 1 | |
|
Sanctuary of Peace Poa El Paso County |
20 | 2 | 0 | |
|
Moffat Town of Saguache County |
12 | 11 | 4 |
About this data
A system is counted once if any of its violations in the past three years involved Chlorine (MRDL), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Chlorine (MRDL) 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.