Water quality in Tonica, Illinois
Tonica 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 |
|---|---|---|---|---|
| Cedar Point Water Company |
266 | 1 | 4.4 mi | |
| IL American-Leonore Leonore |
111 | 0 | 4.8 mi | |
| Lostant Lostant |
463 | 2 | 5.1 mi | |
| Ilog Oglesby Mhp, LLC Oglesby |
88 | 0 | 5.4 mi | |
| Oglesby Oglesby |
4,500 | 1 | 5.6 mi | |
| Jonesville Pwd |
243 | 1 | 5.9 mi | |
| Lynnwood Water Corporation |
100 | 0 | 6.8 mi | |
| LA Salle La Salle |
9,700 | 4 | 9.2 mi | |
| North Utica North Utica |
1,323 | 3 | 9.2 mi | |
| Peru Peru |
9,896 | 2 | 9.7 mi | |
| Grand Ridge Grand Ridge |
515 | 1 | 12.3 mi | |
| Naplate Naplate |
465 | 2 | 13.2 mi | |
| IL American-Streator Streator |
19,000 | 0 | 14.8 mi | |
| Ottawa Ottawa |
18,097 | 3 | 15.0 mi | |
| Ottawa Estates MHP |
125 | 0 | 15.0 mi | |
| Land and Wtr Assn |
83 | 2 | 15.4 mi | |
| Oaklane Sbdv |
63 | 1 | 15.7 mi | |
| Rutland Rutland |
250 | 0 | 16.0 mi | |
| Mendota Estates MHP Mendota |
110 | 1 | 17.9 mi | |
| Marseilles Marseilles |
5,061 | 4 | 20.8 mi | |
| IL Prairie Estate Sbdv Water Association |
78 | 0 | 21.6 mi | |
| Mendota Mendota |
7,100 | 3 | 23.4 mi | |
| Four Star Campground Marseilles |
250 | 1 | 23.6 mi | |
| Country Acres MHP (la Salle County) |
222 | 1 | 24.7 mi | |
| Seneca Seneca |
2,353 | 0 | 24.8 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 Tonica 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.