Illinois
Jefferson County drinking water quality
16 active public water systems serve 35,852 people in Jefferson County. 7 are compliant, 9 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
13 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Mount Vernon Mount Vernon |
15,793 | 2 | 0 | |
|
Northeast Mount Vernon Water Company |
5,483 | 0 | 0 | |
|
Woodlawn Woodlawn |
3,587 | 0 | 0 | |
|
Dix-Kell Water Commssion |
1,972 | 2 | 0 | |
|
Belle Rive Belle Rive |
1,930 | 1 | 0 | |
|
Waltonville Waltonville |
1,901 | 3 | 0 | |
|
Bluford Bluford |
1,880 | 1 | 0 | |
|
Big Muddy River CC Ina |
1,771 | 0 | 0 | |
|
Bonnie Bonnie |
437 | 2 | 0 | |
|
Oak Grove Village Mount Vernon |
385 | 1 | 0 | |
|
Rolling Meadows MHC (jefferson Co) |
218 | 0 | 0 | |
|
Moores Prairie Township Water Company Belle Rive |
213 | 0 | 0 | |
|
Nason |
207 | 0 | 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 |
|---|---|---|---|---|
|
Icehouse Main MT Vernon |
25 | 1 | 0 | |
|
Icehouse South MT Vernon |
25 | 1 | 0 | |
|
Wal-Mart Supercenter 0224 |
25 | 0 | 0 |
Inactive systems (37, 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 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.