Water quality in Oark, Arkansas
Oark is in Johnson County. 12 active public water systems serve the county; 7 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Johnson County
9 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Watalula Water Ass0ciation |
2,278 | 0 | 15.1 mi | |
| Ludwig Water Association |
1,610 | 0 | 15.8 mi | |
| Clarksville Connected Utilities |
9,410 | 0 | 17.3 mi | |
| Coal Hill Waterworks |
1,372 | 4 | 17.4 mi | |
| Hartman Waterworks |
947 | 0 | 17.8 mi | |
| Spadra-Goose Camp Water Assoc |
517 | 1 | 18.9 mi | |
| Lamar Waterworks |
1,885 | 1 | 20.0 mi | |
| East Johnson CO Water Assn |
5,200 | 1 | 22.1 mi | |
| Knoxville Waterworks |
2,087 | 0 | 23.8 mi |
Non-community systems in Johnson County (2: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Usfs Horsehead Bathhouse |
25 | 1 | 0 | |
|
Primo Wmsc0066 Clarksvill |
30 | 1 | 1 |
About this data
Water systems are matched to Johnson County, nearest to Oark first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
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 Arkansas 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.