Chlorine (MRDL) violations in Oklahoma
293 active public water systems in Oklahoma had a Chlorine (MRDL) violation in the past three years, 36 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 |
|---|---|---|---|---|
|
Wynona School Osage County |
140 | 4 | 1 | |
|
Golden Oaks Home Owners Assn Carter County |
135 | 8 | 4 | |
|
Kiowa Rural Water District #1 Kiowa County |
135 | 2 | 0 | |
|
Atoka Co. Rwd #1 (wardville) Atoka County |
125 | 5 | 1 | |
|
Braums Dairy & Processing Plt Grady County |
125 | 1 | 0 | |
|
Strikeaxe Airport Osage County |
125 | 2 | 1 | |
|
Roman Nose State Park Blaine County |
124 | 3 | 0 | |
|
Greenfield Pwa Blaine County |
123 | 5 | 1 | |
|
Skyline MHP Oklahoma County |
120 | 6 | 1 | |
|
Willow Greer County |
114 | 8 | 1 | |
|
Choctaw Estates, LLC Oklahoma County |
105 | 4 | 1 | |
|
Coves at Bird Island Delaware County |
100 | 5 | 0 | |
|
Felt School Cimarron County |
100 | 5 | 0 | |
|
Grant County Rwd #1 Grant County |
100 | 6 | 2 | |
|
Holliday Outt MHP Oklahoma County |
100 | 5 | 1 | |
|
Pine Country Living MHP Pottawatomie County |
100 | 8 | 0 | |
|
White Rock School Lincoln County |
100 | 4 | 0 | |
|
4t Investors LLC Beaver County |
98 | 5 | 1 | |
|
Pettit Mountain Water Cherokee County |
90 | 7 | 1 | |
|
Beaver CO Rwd #2 (gate) Beaver County |
87 | 7 | 4 | |
|
Loyal Kingfisher County |
81 | 5 | 0 | |
|
Og&e Seminole County |
78 | 1 | 0 | |
|
Mountain Village Development Comanche County |
77 | 7 | 1 | |
|
Chisholm Creek Housing Addition Garfield County |
75 | 4 | 0 | |
|
Sugar Mountain Retreat Cherokee County |
65 | 4 | 0 | |
|
Freedom From Addiction Through Christ Ottawa County |
60 | 5 | 1 | |
|
Muskogee Co. Rwd #14 Muskogee County |
60 | 5 | 4 | |
|
Okla Natl Stockyards Oklahoma County |
60 | 6 | 1 | |
|
Oklahoma Academy Cafe Oklahoma County |
60 | 4 | 0 | |
|
Straight School Texas County |
56 | 5 | 0 | |
|
Quapaw Tribe Ottawa County |
55 | 5 | 0 | |
|
Colbert Boat Club Bryan County |
54 | 4 | 0 | |
|
Hwy 7 East Water Assn Comanche County |
50 | 4 | 1 | |
|
Suburban MHP Cherokee County |
50 | 8 | 2 | |
|
Clemmer Water Association Comanche County |
47 | 3 | 1 | |
|
Steelman Estates Pottawatomie County |
45 | 4 | 0 | |
|
Ellis CO Rwd#1 Ellis County |
43 | 2 | 0 | |
|
Valley View Estates Homeowners Assoc Comanche County |
42 | 2 | 0 | |
|
Woods CO Rwd #2 Woods County |
42 | 4 | 0 | |
|
North Latta Park, LLC Oklahoma County |
39 | 7 | 0 | |
|
Douglas Garfield County |
32 | 4 | 0 | |
|
Lazy E Training Center Logan County |
30 | 6 | 1 | |
|
Valley View Water Association Comanche County |
25 | 4 | 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 Oklahoma 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.