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 |
|---|---|---|---|---|
|
Mooreland Woodward County |
1,226 | 4 | 0 | |
|
Geronimo Comanche County |
1,200 | 3 | 0 | |
|
Panhandle State University Texas County |
1,200 | 5 | 1 | |
|
Shattuck Ellis County |
1,200 | 6 | 0 | |
|
Cyril Caddo County |
1,168 | 4 | 0 | |
|
Temple Cotton County |
1,146 | 4 | 0 | |
|
Maud Pottawatomie County |
1,136 | 3 | 0 | |
|
Wagoner Co. Rwd #7 (new) Wagoner County |
1,110 | 5 | 0 | |
|
Laverne Harper County |
1,097 | 4 | 0 | |
|
Oakland Pwa Marshall County |
1,050 | 4 | 2 | |
|
Meeker Public Works Authority Lincoln County |
1,044 | 3 | 0 | |
|
Frontier City Oklahoma County |
1,040 | 6 | 1 | |
|
Major County Rwd #1 Major County |
1,000 | 6 | 1 | |
|
Oklahoma State Reformatory Greer County |
999 | 5 | 1 | |
|
Waynoka Woods County |
993 | 3 | 1 | |
|
Bryan Co. Rwd #6 Bryan County |
990 | 2 | 0 | |
|
Stephens CO Rw&sd #1 Stephens County |
960 | 4 | 1 | |
|
Morrison Public Works Auth. Noble County |
950 | 3 | 0 | |
|
Talihina Pwa Le Flore County |
950 | 4 | 0 | |
|
Boswell Public Works Authority Choctaw County |
932 | 3 | 0 | |
|
Woodward CO Rwd #2 Woodward County |
920 | 5 | 0 | |
|
Dewar Okmulgee County |
917 | 4 | 0 | |
|
Tipton Tillman County |
916 | 7 | 3 | |
|
Quapaw Ottawa County |
906 | 3 | 0 | |
|
Cashion Kingfisher County |
900 | 1 | 0 | |
|
Mountain View Pwa Kiowa County |
880 | 5 | 2 | |
|
Tyrone Texas County |
880 | 4 | 0 | |
|
West Siloam Springs Delaware County |
877 | 6 | 0 | |
|
Pittsburg Co. Rwd #9 (mcalester) Pittsburg County |
872 | 4 | 0 | |
|
Tenkiller Waterworks, Inc. Cherokee County |
860 | 5 | 1 | |
|
Choctaw Co. Rwsg & Swmd #6 Choctaw County |
850 | 5 | 3 | |
|
International Paper McCurtain County |
848 | 4 | 0 | |
|
Colcord Pwa Delaware County |
819 | 4 | 0 | |
|
Roger Mills Rwd # 2 (red Star) Roger Mills County |
800 | 5 | 0 | |
|
Savanna Pittsburg County |
800 | 5 | 2 | |
|
Wright City Pwa McCurtain County |
792 | 3 | 0 | |
|
South Coffeyville Nowata County |
790 | 2 | 0 | |
|
Cheyenne Roger Mills County |
778 | 4 | 0 | |
|
Canadian CO Rwd # 1 Canadian County |
750 | 3 | 0 | |
|
Ottawa CO Rwd #5 Ottawa County |
750 | 7 | 0 | |
|
Copan Pwa Washington County |
733 | 12 | 3 | |
|
Binger Pwa Caddo County |
708 | 4 | 0 | |
|
Osage CO Rws & Swd #3 (braden) Osage County |
700 | 2 | 0 | |
|
Adair CO Rwd #5 Adair County |
675 | 9 | 0 | |
|
Vici Dewey County |
668 | 4 | 0 | |
|
Canton Blaine County |
650 | 2 | 1 | |
|
Alex Grady County |
635 | 8 | 2 | |
|
Union City Canadian County |
618 | 2 | 0 | |
|
Fort Towson Choctaw County |
611 | 4 | 0 | |
|
Paoli Garvin County |
610 | 5 | 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.