COUNTY WATER-SYSTEM LEDGER
DeKalb, Illinois
EPA’s September 2026 export lists 6 active community water systems serving DeKalb, Illinois, with 1 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 DeKalb, Illinois
EPA associates 6 covered systems with DeKalb, Illinois; their reported population-served values total 82,142 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 |
|---|---|---|---|
| DekalbIL0370100 | 40,290 | Ground water | No current violation flagged |
| SycamoreIL0370550 | 18,500 | Ground water | No current violation flagged |
| SandwichIL0374850 | 7,156 | Ground water | Current monitoring/reporting flag |
| Northern Illinois University-DekalbIL0375500 | 6,500 | Ground water purchased | No current violation flagged |
| GenoaIL0370150 | 5,298 | Ground water | No current violation flagged |
| CortlandIL0370051 | 4,398 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for DeKalb, Illinois
EPA classifies 6 systems serving DeKalb, Illinois across 2 primary-source categories; Ground water is the largest category with 5 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.