Oklahoma
Johnston County drinking water quality
13 active public water systems serve 10,296 people in Johnston County. 5 are compliant, 8 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
10 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Tishomingo Municipal Authority |
3,000 | 7 | 0 | |
|
Johnston CO Rwd #3 |
2,783 | 1 | 0 | |
|
Murray State College |
1,150 | 0 | 0 | |
|
Johnston CO Rws& Swmd #4 |
600 | 1 | 0 | |
|
Mannsville Public Works Authority |
587 | 0 | 0 | |
|
Ravia |
459 | 4 | 0 | |
|
Wapanucka |
420 | 0 | 0 | |
|
Milburn Public Works Authority |
317 | 0 | 0 | |
|
Mill Creek |
310 | 4 | 1 | |
|
Bromide |
163 | 1 | 0 |
Non-community systems (3: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sundowner Trailer |
450 | 0 | 0 | |
|
US Silica |
31 | 1 | 0 | |
|
Camp Simpson Bsa |
26 | 1 | 0 |
Inactive systems (20, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.