COUNTY WATER-SYSTEM LEDGER
LaSalle, Illinois
EPA’s September 2026 export lists 8 active community water systems serving LaSalle, Illinois, with 3 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving LaSalle, Illinois
EPA associates 8 covered systems with LaSalle, Illinois; their reported population-served values total 78,508 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Il American-StreatorIL0995030 | 19,000 | Surface water | No current violation flagged |
| OttawaIL0990800 | 18,097 | Ground water | Current monitoring/reporting flag |
| PeruIL0990850 | 10,300 | Ground water | No current violation flagged |
| La SalleIL0990300 | 9,700 | Ground water | No current violation flagged |
| MendotaIL0990550 | 7,100 | Ground water | No current violation flagged |
| MarseillesIL0990500 | 5,061 | Ground water | Current health-based flag |
| Prairie Path Water Company-Lake HolidayIL0995200 | 4,750 | Ground water | No current violation flagged |
| OglesbyIL0990700 | 4,500 | Ground water | Current monitoring/reporting flag |
02 / SOURCE MIX
Primary water sources for LaSalle, Illinois
EPA classifies 8 systems serving LaSalle, Illinois across 2 primary-source categories; Ground water is the largest category with 7 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.