All water systems in Oklahoma
1,291 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Oklahoma City Oklahoma County |
644,000 | 0 | 0 | |
|
Tulsa Tulsa County |
413,000 | 0 | 0 | |
|
Broken Arrow Municipal Authority Tulsa County |
116,330 | 0 | 0 | |
|
Norman Utilities Authority Cleveland County |
104,868 | 1 | 0 | |
|
Lawton Comanche County |
92,757 | 2 | 0 | |
|
Edmond Pwa Oklahoma County |
79,408 | 0 | 0 | |
|
Midwest City Oklahoma County |
55,935 | 3 | 1 | |
|
Moore Public Works Authority Cleveland County |
55,083 | 4 | 0 | |
|
Stillwater Utilities Authority Payne County |
53,000 | 0 | 0 | |
|
Enid Garfield County |
49,347 | 3 | 0 | |
|
Muskogee Municipal Authority Muskogee County |
38,310 | 2 | 0 | |
|
Wagoner Co. Rwd #4 Wagoner County |
37,658 | 4 | 0 | |
|
Bartlesville Washington County |
34,748 | 1 | 0 | |
|
Oklahoma University Cleveland County |
34,000 | 0 | 0 | |
|
Shawnee Municipal Authority Pottawatomie County |
29,990 | 1 | 0 | |
|
Sand Springs Tulsa County |
28,774 | 1 | 0 | |
|
Ponca City Mun Water Kay County |
27,155 | 1 | 0 | |
|
Washington CO Rwd #3 (new,#1) Tulsa County |
25,375 | 2 | 0 | |
|
Ardmore Carter County |
24,893 | 1 | 0 | |
|
Tinker Air Force Base Oklahoma County |
24,645 | 4 | 1 | |
|
Duncan Public Utilities Authority Stephens County |
23,000 | 2 | 0 | |
|
Fort Sill Hqusafacfs Comanche County |
23,000 | 0 | 0 | |
|
Owasso Tulsa County |
23,000 | 1 | 0 | |
|
Ada Pontotoc County |
22,600 | 2 | 0 | |
|
Yukon Canadian County |
22,498 | 0 | 0 | |
|
Del City Oklahoma County |
22,128 | 1 | 0 | |
|
Bethany Oklahoma County |
20,307 | 4 | 0 | |
|
Sapulpa Creek County |
19,702 | 1 | 0 | |
|
Bixby Public Works Authority Tulsa County |
18,750 | 2 | 1 | |
|
Altus Jackson County |
18,717 | 5 | 0 | |
|
Mustang, City of Canadian County |
18,576 | 5 | 2 | |
|
McAlester Pwa Pittsburg County |
18,206 | 5 | 0 | |
|
Marshall County Rural Water District #2 Marshall County |
17,587 | 1 | 0 | |
|
Jenks Pwa Tulsa County |
16,924 | 1 | 0 | |
|
EL Reno Canadian County |
16,212 | 2 | 0 | |
|
Chickasha Municipal Authority Grady County |
16,036 | 5 | 1 | |
|
Claremore Rogers County |
15,873 | 0 | 0 | |
|
Durant Utilities Authority Bryan County |
15,545 | 1 | 0 | |
|
Woodward Woodward County |
15,000 | 5 | 1 | |
|
Tahlequah Pwa Cherokee County |
14,458 | 2 | 0 | |
|
Miami Ottawa County |
13,704 | 1 | 0 | |
|
Okmulgee Pwa Okmulgee County |
13,495 | 6 | 0 | |
|
Sequoyah Co. Rwd #8 Sequoyah County |
13,460 | 3 | 1 | |
|
Osu Water Plant Payne County |
13,000 | 1 | 0 | |
|
Creek CO Rwd # 2 Creek County |
12,788 | 3 | 0 | |
|
Glenpool Water Tulsa County |
12,500 | 1 | 0 | |
|
Rogers CO Rwd # 5 Rogers County |
11,782 | 0 | 0 | |
|
Guymon Texas County |
11,442 | 2 | 0 | |
|
Southern Okla Water Corp Carter County |
11,250 | 3 | 0 | |
|
Weatherford Custer County |
10,833 | 5 | 1 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
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. Retrieved from ECHO on Oct 11, 2026.