Illinois
Grundy County drinking water quality
63 active public water systems serve 52,200 people in Grundy County. 28 are compliant, 35 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
20 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Morris Morris |
14,775 | 1 | 0 | |
|
Minooka Minooka |
12,800 | 0 | 0 | |
|
Coal City Coal City |
5,845 | 4 | 2 | |
|
Diamond Diamond |
2,508 | 0 | 0 | |
|
Gardner Gardner |
1,361 | 0 | 0 | |
|
Mazon Mazon |
994 | 1 | 0 | |
|
Shady Oaks MHP |
912 | 3 | 0 | |
|
Braceville Braceville |
800 | 6 | 1 | |
|
South Wilmington South Wilmington |
710 | 4 | 2 | |
|
Burt Estates MHC Diamond |
543 | 1 | 0 | |
|
Bookwalter Woods MHP |
389 | 1 | 0 | |
|
Carbon Hill Carbon Hill |
370 | 1 | 0 | |
|
IL American-Nettle Creek |
317 | 0 | 0 | |
|
IL American-Ridgecrest |
203 | 0 | 0 | |
|
Prairie Oaks Ests Homeowners Assn Coal City |
107 | 3 | 1 | |
|
Kinsman Kinsman |
99 | 3 | 2 | |
|
Heatherfield Subdivision |
90 | 2 | 1 | |
|
Ridgecrest North Subdivision |
60 | 3 | 0 | |
|
Hawthorn Estates Subdivision |
49 | 1 | 1 | |
|
Lisbon North, Inc. |
25 | 1 | 0 |
Non-community systems (43: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (180, 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.