Illinois
Hancock County drinking water quality
13 active public water systems serve 11,901 people in Hancock County. 5 are compliant, 8 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
11 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Hamilton Hamilton |
2,753 | 0 | 0 | |
|
Carthage |
2,510 | 1 | 0 | |
|
Warsaw Warsaw |
1,480 | 2 | 0 | |
|
Laharpe La Harpe |
1,200 | 5 | 1 | |
|
Nauvoo Nauvoo |
1,200 | 3 | 0 | |
|
Dallas City Dallas City |
788 | 1 | 0 | |
|
Augusta Augusta |
553 | 0 | 0 | |
|
Bowen Bowen |
494 | 0 | 0 | |
|
Plymouth Plymouth |
460 | 1 | 0 | |
|
West Point West Point |
248 | 0 | 0 | |
|
Elvaston Elvaston |
165 | 0 | 0 |
Non-community systems (2: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
County Market 287 Carthage |
25 | 2 | 0 | |
|
Tri-County Country Club |
25 | 3 | 1 |
Inactive systems (63, 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.