IL1115750 · Illinois
WONDER LAKE
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 5
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 3
Counties listed by EPA · McHenry County, Illinois
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 5 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 140 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 7146999 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start July 1, 2025 · period end November 18, 2025 · first reported November 21, 2025 · EPA return-to-compliance field November 18, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9945259 July 29, 2025 Informal State Violation/Reminder Notice 9945260 July 29, 2025 Informal State Public Notification requested 9945263 November 18, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 7146998 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start April 1, 2025 · period end August 27, 2025 · first reported August 18, 2025 · EPA return-to-compliance field August 27, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9945257 July 16, 2025 Informal State Violation/Reminder Notice 9945261 August 27, 2025 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 7146994 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start February 10, 2024 · period end April 8, 2024 · first reported November 21, 2024 · EPA return-to-compliance field April 8, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9945244 March 15, 2024 Informal State Violation/Reminder Notice 9945252 April 8, 2024 Resolving State Compliance achieved EPA health-based flag · Resolved
OCCT/SOWT Study/RecommendationViolation 7146990 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start April 2, 2023 · period end June 22, 2023 · first reported August 29, 2023 · EPA return-to-compliance field June 22, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9945235 April 17, 2023 Informal State Violation/Reminder Notice 9945236 April 17, 2023 Informal State Public Notification requested 9945238 June 22, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 7146945 · Nitrate · Nitrate RuleNoncompliance period start January 1, 2022 · period end December 31, 2022 · first reported February 28, 2023 · EPA return-to-compliance field December 31, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9945210 February 6, 2023 Informal State Violation/Reminder Notice 9945211 February 6, 2023 Informal State Public Notification requested 9945234 March 27, 2023 Informal State Public Notification received 9945240 September 19, 2023 Resolving State Compliance achieved
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