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 |
|---|---|---|---|---|
|
Buena Vista Correctional Facility Chaffee County |
1,700 | 3 | 0 | |
|
Norwood Water Commission San Miguel County |
1,700 | 3 | 0 | |
|
Ouray City of Ouray County |
1,460 | 7 | 0 | |
|
Steamboat II MD Routt County |
1,450 | 8 | 1 | |
|
Foxridge Farms MHP Arapahoe County |
1,440 | 4 | 0 | |
|
Purgatory MD La Plata County |
1,364 | 3 | 0 | |
|
Mancos Rural Water Company Montezuma County |
1,300 | 10 | 5 | |
|
Canterbury Park Colorado Springs · El Paso County |
1,240 | 3 | 0 | |
|
Edgemont Ranch MD La Plata County |
1,200 | 5 | 0 | |
|
Ellicott Elem SR High School El Paso County |
1,114 | 7 | 1 | |
|
Dallas Creek WC Ouray County |
1,059 | 4 | 0 | |
|
Cloverleaf Colorado LLC Larimer County |
1,007 | 3 | 0 | |
|
Longview MHP Weld County |
1,000 | 3 | 0 | |
|
Brook Forest WD Jefferson County |
998 | 5 | 1 | |
|
Antonito Town of Conejos County |
981 | 3 | 0 | |
|
Oak Creek Town of Routt County |
950 | 9 | 0 | |
|
Debeque Town of Mesa County |
911 | 7 | 0 | |
|
Kiowa Water and Wastewater Authority Elbert County |
910 | 2 | 0 | |
|
Arbordale Acres MHP Boulder County |
901 | 5 | 0 | |
|
Garden Valley El Paso County |
900 | 8 | 2 | |
|
Nucla Town of Montrose County |
875 | 5 | 0 | |
|
Rogers Mesa WC Delta County |
840 | 3 | 0 | |
|
Durango la Plata Airport La Plata County |
780 | 8 | 0 | |
|
Rye Town of Pueblo County |
745 | 8 | 1 | |
|
Centauri HS Centauri MS Conejos County |
700 | 6 | 1 | |
|
EL Moro Hoehne Pipeline Assoc Las Animas County |
655 | 4 | 0 | |
|
Prairie Greens MHP Weld County |
654 | 4 | 0 | |
|
Climax Climax Mine Lake County |
615 | 5 | 0 | |
|
Naturita Town of Montrose County |
585 | 4 | 0 | |
|
KV HOA INC Saguache County |
580 | 4 | 0 | |
|
Franklin Mobile Home Park Adams County |
513 | 4 | 0 | |
|
EL Morro Mobile Estates El Paso County |
504 | 5 | 0 | |
|
New Creation Church of Glenwood Garfield County |
499 | 2 | 0 | |
|
Eureka WC Otero County |
498 | 9 | 1 | |
|
Crawford Mesa WA Delta County |
486 | 4 | 0 | |
|
Bailey Wsd Park County |
483 | 7 | 3 | |
|
Game Trail Association INC Chaffee County |
480 | 2 | 0 | |
|
FT Garland Wsd Costilla County |
477 | 6 | 3 | |
|
Valley Maint Corp NO 1 Teller County |
470 | 7 | 2 | |
|
Yampa Town of Routt County |
467 | 5 | 0 | |
|
Aguilar Town of Las Animas County |
447 | 4 | 1 | |
|
Fleming Town of Logan County |
446 | 6 | 1 | |
|
Beulah Water Works District Pueblo County |
445 | 6 | 0 | |
|
Rico Town of Dolores County |
437 | 2 | 0 | |
|
Countryside of Greeley Weld County |
435 | 2 | 0 | |
|
Aldasoro Ranch Hoc San Miguel County |
412 | 3 | 0 | |
|
Chalk Creek Campground Chaffee County |
401 | 3 | 1 | |
|
Gardner Water and Sanitation Dist Huerfano County |
400 | 7 | 2 | |
|
Gateway Canyons WS Mesa County |
370 | 3 | 0 | |
|
Romeo Town of Conejos County |
365 | 5 | 1 |
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.