Illinois
Mason County drinking water quality
25 active public water systems serve 8,927 people in Mason County. 9 are compliant, 16 had at least one EPA violation in the past three years, 2 are designated serious violators, and 0 carry a health flag.
Needs attention
Community water systems
6 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Havana Havana |
2,963 | 1 | 0 | |
|
Mason City Mason City |
2,393 | 0 | 0 | |
|
Manito Manito |
1,552 | 0 | 0 | |
|
San Jose San Jose |
479 | 0 | 0 | |
|
Easton Easton |
325 | 2 | 0 | |
|
Forest City Forest City |
222 | 3 | 1 |
Non-community systems (19: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lost Arrow Campominium |
223 | 0 | 0 | |
|
ST Pauls Luthern Church |
150 | 0 | 0 | |
|
One More Inc. |
100 | 1 | 1 | |
|
Mad Jacks INC |
75 | 3 | 0 | |
|
Hialeah Club |
60 | 0 | 0 | |
|
Mason State Tree Nursery |
40 | 0 | 0 | |
|
Sand Ridge State Forest (117515) |
40 | 2 | 1 | |
|
Evening Star Camping Resort |
30 | 2 | 1 | |
|
Dollar General Store #21266 |
25 | 1 | 1 | |
|
Dragon Tail Holdings, LLC |
25 | 0 | 0 | |
|
Evening Star Camping Resort (150201) |
25 | 3 | 1 | |
|
Evening Star Camping Resort (4150) |
25 | 2 | 1 | |
|
Evening Star Camping Resort(3608) |
25 | 3 | 1 | |
|
Four Willows Golf Course |
25 | 3 | 1 | |
|
Havana County Market |
25 | 0 | 0 | |
|
Jake Wolf Fish Hatchery |
25 | 1 | 0 | |
|
Just Chillin' Ice & Water Havana |
25 | 1 | 0 | |
|
Sand Ridge State Forest Head Qtr #1 |
25 | 3 | 1 | |
|
Sand Ridge State Forest Pine Camp #2 |
25 | 3 | 1 |
Inactive systems (253, 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.