Water quality in Ottawa, Illinois
Ottawa is in LaSalle County. 172 active public water systems serve the county; 101 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in LaSalle County
36 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Oaklane Sbdv |
63 | 1 | 1.6 mi | |
| Land and Wtr Assn |
83 | 2 | 1.6 mi | |
| Ottawa Estates MHP |
125 | 0 | 1.8 mi | |
| Naplate Naplate |
465 | 2 | 3.9 mi | |
| IL Prairie Estate Sbdv Water Association |
78 | 0 | 7.0 mi | |
| Marseilles Marseilles |
5,061 | 4 | 7.5 mi | |
| Grand Ridge Grand Ridge |
515 | 1 | 7.8 mi | |
| North Utica North Utica |
1,323 | 3 | 9.2 mi | |
| Four Star Campground Marseilles |
250 | 1 | 10.1 mi | |
| Oglesby Oglesby |
4,500 | 1 | 12.1 mi | |
| Jonesville Pwd |
243 | 1 | 12.3 mi | |
| Seneca Seneca |
2,353 | 0 | 12.3 mi | |
| Seneca Mobile Homes LLC |
10 | 2 | 12.5 mi | |
| Ilog Oglesby Mhp, LLC Oglesby |
88 | 0 | 12.8 mi | |
| Country Acres MHP (la Salle County) |
222 | 1 | 12.9 mi | |
| LA Salle La Salle |
9,700 | 4 | 13.2 mi | |
| IL American-Leonore Leonore |
111 | 0 | 13.3 mi | |
| Sheridan Correctional Center |
1,670 | 2 | 14.0 mi | |
| Lynnwood Water Corporation |
100 | 0 | 14.7 mi | |
| Mendota Estates MHP Mendota |
110 | 1 | 14.7 mi | |
| Tonica Tonica |
705 | 0 | 15.0 mi | |
| Peru Peru |
9,896 | 2 | 15.1 mi | |
| Cedar Point Water Company |
266 | 1 | 16.0 mi | |
| IL American-Streator Streator |
19,000 | 0 | 17.0 mi | |
| Earlville Earlville |
1,613 | 0 | 17.1 mi |
Non-community systems in LaSalle County (135: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to LaSalle County, nearest to Ottawa first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
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.