Water quality in Johnston, South Carolina
Johnston is in Edgefield County. 9 active public water systems serve the county; 3 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Edgefield County
1 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Edgefield CO W&sa (1920001) North Augusta |
29,200 | 0 | 7.9 mi |
Non-community systems in Edgefield County (7: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
J W Yonce 101 (sc1971000) Johnston |
72 | 0 | 0 | |
|
J W Yonce 404 (sc1971002) Johnston |
60 | 1 | 0 | |
|
Hwy 191 Camp (sc1971017) Ward (wards) |
50 | 0 | 0 | |
|
Titan Farms Camp 9 (sc1971010) |
41 | 0 | 0 | |
|
Three Star Vineyards (sc1974001) Johnston |
26 | 1 | 0 | |
|
Titan Farms Camp 5 (1971009) Ridge Spring |
74 | 0 | 0 | |
|
J Forrest-Satcher Camp (sc1971015) |
50 | 1 | 0 |
About this data
Water systems are matched to Edgefield County, nearest to Johnston 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 South Carolina 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.