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 |
|---|---|---|---|---|
|
Holiday Village Mobile Home Community El Paso County |
360 | 2 | 0 | |
|
Santa FE Trail Ranch MD Las Animas County |
360 | 5 | 0 | |
|
Stoneybrook Pointe Weld County |
355 | 5 | 0 | |
|
Baxter Water and Services Pueblo County |
350 | 10 | 0 | |
|
Dinosaur Town of Moffat County |
350 | 6 | 1 | |
|
Gambel Oaks HOA Elbert County |
350 | 1 | 0 | |
|
Fruitland Domestic WC Montrose County |
335 | 10 | 3 | |
|
Beverly Hills Mutual WC Douglas County |
325 | 1 | 0 | |
|
Lazy Glen HOA Pitkin County |
322 | 5 | 1 | |
|
Horca Subd Red Bear Inn Conejos County |
307 | 4 | 0 | |
|
Fox Acres Comm Serv Corp Larimer County |
306 | 2 | 0 | |
|
Terrace Park MHP Weld County |
297 | 2 | 0 | |
|
Wilson Mesa San Miguel County |
290 | 6 | 0 | |
|
Nueva Vida Mobile Home Park Larimer County |
266 | 7 | 3 | |
|
Sleepy Valley Community MHP El Paso County |
260 | 8 | 1 | |
|
Grand Meadow of Longmont MHP Boulder County |
255 | 3 | 0 | |
|
Capulin WD Conejos County |
250 | 7 | 1 | |
|
Hanson Mesa Domestic Pipeline CO INC Delta County |
250 | 3 | 0 | |
|
Monument Meadow Village MHP El Paso County |
250 | 6 | 1 | |
|
Stewart Mesa WC Delta County |
250 | 3 | 0 | |
|
Warm Springs Owners Mutual WA Park County |
250 | 3 | 1 | |
|
Monarch Mountain Lodge Chaffee County |
247 | 14 | 5 | |
|
Coalby Domestic WC Delta County |
239 | 3 | 0 | |
|
Merino Town of Logan County |
235 | 2 | 0 | |
|
Woody Creek Metropolitan District Pitkin County |
220 | 5 | 1 | |
|
Centerville Pit Stop Chaffee County |
203 | 3 | 0 | |
|
Durango Regency MHP La Plata County |
200 | 3 | 1 | |
|
Oak Meadows MHP Montezuma County |
200 | 7 | 1 | |
|
Paradox Pipeline CO Montrose County |
200 | 6 | 0 | |
|
Phippsburg Town of Routt County |
200 | 5 | 0 | |
|
Bethune Town of Kit Carson County |
195 | 6 | 1 | |
|
Glenview Owners Assoc Chaffee County |
195 | 2 | 0 | |
|
Mountain View Mobile Home Park Montrose County |
193 | 3 | 0 | |
|
Castle Park MHP Douglas County |
191 | 3 | 0 | |
|
Prairie View Poa Adams County |
175 | 2 | 0 | |
|
Elegant Hills MHP Montezuma County |
170 | 4 | 1 | |
|
MT Elbert WA Lake County |
170 | 5 | 0 | |
|
Vona Town of Kit Carson County |
160 | 5 | 1 | |
|
Wagon Wheel MHP Alamosa County |
160 | 3 | 0 | |
|
Hidden Valley Water District Jefferson County |
155 | 4 | 0 | |
|
Beehive Water Association Otero County |
154 | 9 | 1 | |
|
Easy Water LLC Hesperus · La Plata County |
154 | 3 | 1 | |
|
Genoa Town of Lincoln County |
153 | 9 | 1 | |
|
Knolls at Durango HOA La Plata County |
150 | 3 | 0 | |
|
Meadow Village Mobile Home Park Weld County |
150 | 5 | 1 | |
|
Monte Vista CO OP Rio Grande County |
150 | 3 | 0 | |
|
Princeton Estates Subd Chaffee County |
150 | 2 | 0 | |
|
Sans Souci Cooperative Boulder County |
150 | 8 | 2 | |
|
Security MHP El Paso County |
150 | 3 | 0 | |
|
Sleepy Bear MHP Routt County |
150 | 9 | 0 |
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.