EPA public water records · 17043
DuPage County, Illinois
Find listed community water systems and their documented follow-up in federal fiscal 2026Q3.
- Systems with linked histories
- 33
- Systems with unresolved health-based records
- 0
- Of those, systems with a formally addressed health-based record
- 0
These counts cover the linked records shown here. A county listing can cover only part of the county or reflect a mailing location.
Find your water system
- ADDISONIL0430050 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- BENSENVILLEIL0434140 · Illinois · 3 violation records · 0 unresolved health-based in this snapshot
- BLOOMINGDALEIL0430100 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- BURR RIDGEIL0434190 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- CAROL STREAMIL0430200 · Illinois · 5 violation records · 0 unresolved health-based in this snapshot
- CLARENDON HILLSIL0430250 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- DARIENIL0430270 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- GLEN ELLYNIL0430450 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- GLEN ELLYN HEIGHTS SUBDIVISIONIL0435500 · Illinois · 7 violation records · 0 unresolved health-based in this snapshot
- GLENDALE HEIGHTSIL0430400 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- HINSDALEIL0434520 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- IL AMERICAN-CLARENDONIL0435300 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- LIBERTY PARK HOMEOWNERS ASSOCIATIONIL0435600 · Illinois · 4 violation records · 0 unresolved health-based in this snapshot
- LISLEIL0430551 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- LOMBARDIL0430600 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- NAPERVILLEIL0434670 · Illinois · 16 violation records · 0 unresolved health-based in this snapshot
- NORTH REGIONAL WATER FACIL0435850 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- OAK BROOKIL0430700 · Illinois · 3 violation records · 0 unresolved health-based in this snapshot
- OAKBROOK TERRACEIL0430750 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- PLEASANT RIDGE MHPIL0435945 · Illinois · 104 violation records · 0 unresolved health-based in this snapshot
- ROSELLEIL0434820 · Illinois · 4 violation records · 0 unresolved health-based in this snapshot
- SOUTHEAST REGIONAL WATER FACILITYIL0430060 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- STEEPLE RUN SBDVIL0437160 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- VILLA PARKIL0430800 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- WARRENVILLEIL0430833 · Illinois · 44 violation records · 0 unresolved health-based in this snapshot
- WESTMONTIL0430950 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- WHEATONIL0431050 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- WILLOWBROOKIL0431100 · Illinois · 8 violation records · 0 unresolved health-based in this snapshot
- WINFIELDIL0431150 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- WOOD DALEIL0431200 · Illinois · 4 violation records · 0 unresolved health-based in this snapshot
- WOOD DALE ESTATESIL0437245 · Illinois · 39 violation records · 0 unresolved health-based in this snapshot
- WOODRIDGEIL0431250 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- YORK TOWNSHIP WATER SYSTEMIL0430010 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
EPA data and scope
How to read the records
The enforcement snapshot is federal fiscal 2026Q3. The EPA archive labels its violation file October 13, 2026. EPA says federal reporting can lag by several months. For current advisories, check your utility or local drinking-water authority.
- We matched active community water systems by public water system ID between EPA’s system search and SDWIS inventory. We show violations with a recorded noncompliance, initial reporting or return-to-compliance date from 2021 onward, plus earlier records listed as Addressed or Unaddressed.
- EPA’s health-based flag identifies violations of contaminant or disinfectant limits or treatment requirements. Monitoring and reporting violations describe required tests or reports. Neither category measures household exposure.
- Addressed means EPA records formal enforcement on a violation that remains unresolved in the snapshot. Unaddressed means no formal action is recorded for an unresolved violation. Resolved can mean compliance was restored, the rule ceased to apply, or further action was unnecessary. Archived is a separate status.
- We count a violation once per water system and group its distinct linked actions. Conflicting records are set aside. Places are EPA-listed search locations and can include mailing locations. Use the provider name and system ID to identify your service.
EPA data dictionary and files · EPA reporting and enforcement FAQ · Find an annual water quality report · How to get the report from your utility