EPA public water records · 17111
McHenry County, Illinois
Find listed community water systems and their documented follow-up in federal fiscal 2026Q3.
- Systems with linked histories
- 22
- 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
- AQUA ILLINOIS-CRYSTAL CLEAR WATER CO.IL1115150 · Illinois · 4 violation records · 0 unresolved health-based in this snapshot
- AQUA ILLINOIS-EASTWOOD MANORIL1115250 · Illinois · 4 violation records · 0 unresolved health-based in this snapshot
- CARYIL1110100 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- CRYSTAL LAKEIL1110150 · Illinois · 12 violation records · 0 unresolved health-based in this snapshot
- FOX RIVER GROVEIL1110200 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- HARBOR LITES-PISTAKEE FSHG CLIL1110011 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- HEBRONIL1110300 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- HUNTLEYIL1110350 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- IL AMERICAN-WALK UP WOODSIL1115800 · Illinois · 8 violation records · 0 unresolved health-based in this snapshot
- IL AMERICAN-WHISPERING HILLSIL1115700 · Illinois · 61 violation records · 0 unresolved health-based in this snapshot
- JOHNSBURG 1IL1110040 · Illinois · 5 violation records · 0 unresolved health-based in this snapshot
- JOHNSBURG NO.2IL1115080 · Illinois · 4 violation records · 0 unresolved health-based in this snapshot
- LAKE IN THE HILLSIL1110400 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- LAKEWOODIL1115760 · Illinois · 22 violation records · 0 unresolved health-based in this snapshot
- MCHENRYIL1110600 · Illinois · 23 violation records · 0 unresolved health-based in this snapshot
- OAKBROOK ESTATES MHPIL1115125 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- ROYAL OAKS MHPIL1115145 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- UNIONIL1110900 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- VALLEY HI NURSING HOMEIL1115189 · Illinois · 1 violation records · 0 unresolved health-based in this snapshot
- WONDER LAKEIL1115750 · Illinois · 5 violation records · 0 unresolved health-based in this snapshot
- WONDER LAKE (NIU)IL1115850 · Illinois · 2 violation records · 0 unresolved health-based in this snapshot
- WOODSTOCKIL1110950 · Illinois · 4 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