All water systems in Illinois
23 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Mason Mason · Effingham County |
396 | 0 | 0 | |
|
Mason CO Prairie Trails MHP Mason County |
300 | 0 | 0 | |
|
Mason Point Moultrie County |
195 | 0 | 0 | |
|
Masonite Corp Research Ctr DuPage County |
144 | 0 | 0 | |
|
Johnson County Masonic Lodge Johnson County |
100 | 0 | 0 | |
|
Masonite Corp Research Ctr DuPage County |
75 | 0 | 0 | |
|
Mason Corp DuPage County |
40 | 0 | 0 | |
|
Mason Corp DuPage County |
40 | 0 | 0 | |
|
Mason County Edgewood Ter Mason County · Mason County |
30 | 0 | 0 | |
|
Mason County Edgewood Ter Mason County · Mason County |
30 | 0 | 0 | |
|
Mason County Edgewood Ter Mason County · Mason County |
30 | 0 | 0 | |
|
Mason County Edgewood Ter Mason County · Mason County |
30 | 0 | 0 | |
|
Concrete Masons Local 18 Tazewell County |
25 | 0 | 0 | |
|
F S Mason County Service CO Mason County |
25 | 0 | 0 | |
|
F S Mason County Service CO Mason County |
25 | 0 | 0 | |
|
Iga Mason City Market Mason County |
25 | 0 | 0 | |
|
Mason County Clearview ES Mason County · Mason County |
25 | 0 | 0 | |
|
Mason County Service CO Mason County |
25 | 0 | 0 | |
|
Mason County Service CO Mason County |
25 | 0 | 0 | |
|
Mason State Tree Nursury Mason County |
25 | 0 | 0 | |
|
Mason's Mobile Manor MHP Stephenson County |
25 | 0 | 0 | |
|
Masonite Corp DuPage County |
25 | 0 | 0 | |
|
Milburn Masonic Lodge Lake County |
25 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules currently in violation at EPA's latest data refresh.
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.