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 |
|---|---|---|---|---|
|
Leflore Co. Rwd #18 Le Flore County |
3,870 | 4 | 0 | |
|
Madill Marshall County |
3,410 | 4 | 0 | |
|
Muldrow Pwa Sequoyah County |
3,104 | 3 | 0 | |
|
Lindsay Pwa Garvin County |
2,850 | 2 | 0 | |
|
Rogers CO Rwd # 2 Rogers County |
2,750 | 2 | 0 | |
|
McIntosh Co. Rwd #5 McIntosh County |
1,900 | 4 | 0 | |
|
Kingston Pwa Marshall County |
1,600 | 3 | 0 | |
|
Little Axe School Cleveland County |
1,400 | 2 | 0 | |
|
Hughes Co. Rwd #1 Hughes County |
1,225 | 2 | 0 | |
|
Maysville Garvin County |
1,212 | 8 | 3 | |
|
Hydro Pwa Caddo County |
1,060 | 5 | 1 | |
|
Howard McLeod Correctional Center Atoka County |
825 | 3 | 0 | |
|
Tryon Lincoln County |
448 | 11 | 4 | |
|
Carmen Public Works Authority Alfalfa County |
355 | 11 | 3 | |
|
Fargo Ellis County |
326 | 7 | 1 | |
|
Leon Rwd #1 (love County) Love County |
300 | 4 | 1 | |
|
Wildfire Estates Homeowners Cleveland County |
285 | 8 | 3 | |
|
Manitou Tillman County |
278 | 6 | 1 | |
|
Harper CO Rwd #1 Harper County |
198 | 10 | 1 | |
|
Sharon Utilities Woodward County |
175 | 10 | 2 | |
|
Kenefic Bryan County |
165 | 5 | 0 | |
|
Fairmont Garfield County |
147 | 5 | 0 | |
|
Hanna Pwa McIntosh County |
133 | 6 | 1 | |
|
Foss Washita County |
127 | 7 | 0 | |
|
Manchester Grant County |
104 | 6 | 2 | |
|
Brooksville Pottawatomie County |
90 | 10 | 4 | |
|
Surrey Hills Texas County |
87 | 14 | 4 | |
|
Cleveland CO Rw,s,g&swmd #1 Cleveland County |
80 | 3 | 1 | |
|
Grady CO Rwd #3 Grady County |
80 | 10 | 4 | |
|
Osage Park Addn Prop Osage County |
65 | 12 | 5 | |
|
Highway 69 Water Dist. (greer's Sausage) Mayes County |
43 | 7 | 3 | |
|
Walnut Park Estates Osage County |
42 | 11 | 4 | |
|
Shady Acres Custer County Custer County |
40 | 8 | 2 | |
|
Canoe Mountain Water System Cherokee County |
37 | 12 | 2 | |
|
Rock Creek Logan County |
33 | 12 | 5 | |
|
Skyview Mobile Home Park Grady County |
24 | 12 | 5 | |
|
Washington CO Rwd #3 (new,#1) Tulsa County |
25,375 | 2 | 0 | |
|
Chickasha Municipal Authority Grady County |
16,036 | 5 | 1 | |
|
Woodward Woodward County |
15,000 | 5 | 1 | |
|
Sequoyah Co. Rwd #8 Sequoyah County |
13,460 | 3 | 1 | |
|
Creek CO Rwd # 2 Creek County |
12,788 | 3 | 0 | |
|
Weatherford Custer County |
10,833 | 5 | 1 | |
|
Rogers CO Rwd # 3 Cot Sta Rogers County |
10,750 | 5 | 0 | |
|
Elk City Beckham County |
10,510 | 2 | 0 | |
|
Coweta Pwa Wagoner County |
9,450 | 11 | 1 | |
|
Bryan County Rural Water District #5 Bryan County |
8,325 | 3 | 1 | |
|
Newcastle McClain County |
7,900 | 2 | 1 | |
|
Piedmont Municipal Authority Canadian County |
7,542 | 6 | 1 | |
|
Anadarko Public Works Authority Caddo County |
6,804 | 3 | 0 | |
|
Vinita Utilities Authority Craig County |
6,472 | 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 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.