CITY WATER-SYSTEM LEDGER
Darien, Illinois
EPA’s September 2026 export lists 1 active community water systems serving Darien, Illinois, with 0 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 Darien, Illinois
EPA associates 1 covered systems with Darien, Illinois; their reported population-served values total 21,751 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 |
|---|---|---|---|
| DarienIL0430270 | 21,751 | Surface water purchased | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Darien, Illinois
EPA classifies 1 systems serving Darien, Illinois across 1 primary-source categories; Surface water purchased is the largest category with 1 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.