Illinois
Ogle County drinking water quality
115 active public water systems serve 49,622 people in Ogle County. 52 are compliant, 63 had at least one EPA violation in the past three years, 3 are designated serious violators, and 4 carry a health flag.
Needs attention
Community water systems
24 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rochelle Rochelle |
9,446 | 1 | 0 | |
|
Byron Byron |
3,784 | 1 | 0 | |
|
Oregon Oregon |
3,449 | 4 | 1 | |
|
Mount Morris Mount Morris |
2,861 | 1 | 1 | |
|
Polo Polo |
2,355 | 0 | 0 | |
|
Davis Junction Davis Junction |
2,344 | 0 | 0 | |
|
Forreston Forreston |
1,338 | 0 | 0 | |
|
Hillcrest Hillcrest |
1,224 | 5 | 0 | |
|
Stillman Valley Stillman Valley |
1,200 | 0 | 0 | |
|
Lost Lake Utility District |
704 | 2 | 0 | |
|
Creston Creston |
627 | 4 | 1 | |
|
Rolling Meadows MHC |
447 | 2 | 0 | |
|
Aqua Illinois-Nordic Woods |
425 | 0 | 0 | |
|
Mount Morris Estates MHP |
425 | 2 | 0 | |
|
Leaf River Leaf River |
403 | 3 | 1 | |
|
Shangri-La MHP |
370 | 1 | 0 | |
|
IL American-Rockvale |
298 | 2 | 0 | |
|
Aqua Illinois-Woodlawn |
290 | 0 | 0 | |
|
Rolling Green Estates MHP |
191 | 0 | 0 | |
|
Country View Estates Subdivision |
125 | 0 | 0 | |
|
Meridian MHP |
78 | 0 | 0 | |
|
Rolling Meadows-Foxglove Davis Junction |
70 | 1 | 0 | |
|
Knolls Edge Subdivision |
68 | 0 | 0 | |
|
Lindenwood Water Association |
38 | 2 | 1 |
Non-community systems (91: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (320, 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.