Water quality in Johnston City, Illinois
Johnston City is in Williamson County. 26 active public water systems serve the county; 20 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 Williamson County
23 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Highway 37 North Pwd |
1,068 | 2 | 2.4 mi | |
| Ferges Water District |
1,185 | 2 | 2.5 mi | |
| Pittsburg Pittsburg |
2,948 | 0 | 4.2 mi | |
| Marion Marion |
16,855 | 0 | 5.4 mi | |
| Herrin Herrin |
12,747 | 6 | 5.4 mi | |
| Marion Mobile Home Village Marion |
170 | 0 | 5.6 mi | |
| Freeman Spur Freemanspur |
373 | 1 | 5.9 mi | |
| Energy Energy |
984 | 0 | 5.9 mi | |
| Crainville Crainville |
1,711 | 3 | 8.2 mi | |
| Colp Colp |
506 | 2 | 8.3 mi | |
| Coal Valley Pwd |
4,023 | 1 | 8.5 mi | |
| Carterville Carterville |
6,528 | 2 | 9.1 mi | |
| Blairsville Pwd Carterville |
807 | 6 | 10.1 mi | |
| Cambria Cambria |
1,727 | 1 | 10.2 mi | |
| The Orchards MHC Carterville |
253 | 0 | 11.2 mi | |
| Fci-Marion Marion |
1,544 | 3 | 11.3 mi | |
| Hurst Hurst |
782 | 4 | 11.4 mi | |
| Bush Bush |
285 | 1 | 11.7 mi | |
| Lake of Egypt Pwd Marion |
11,368 | 1 | 13.3 mi | |
| Creal Springs Creal Springs |
683 | 2 | 14.3 mi | |
| Devils Kitchen Water District |
1,428 | 6 | 14.5 mi | |
| Corinth Pwd |
3,927 | 2 | — | |
| Crab Orchard Refuge |
25 | 0 | — |
Non-community systems in Williamson County (2: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Walmart Supercenter #0216 |
25 | 1 | 1 | |
|
LJ Ice Company |
25 | 1 | 1 |
About this data
Water systems are matched to Williamson County, nearest to Johnston City 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 or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
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 Illinois 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.