IL0950350 · Illinois
MAQUON
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 4
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 4
Counties listed by EPA · Knox 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 3 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 91 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 7136613 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start August 1, 2024 · period end August 31, 2024 · first reported November 21, 2024 · EPA return-to-compliance field August 31, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8129318 September 25, 2024 Informal State Violation/Reminder Notice 8129319 September 25, 2024 Informal State Public Notification requested 8129322 October 10, 2024 Resolving State Compliance achieved 8129324 June 25, 2025 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 7136614 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2024 · period end September 30, 2024 · first reported November 21, 2024 · EPA return-to-compliance field September 30, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8129320 September 25, 2024 Informal State Violation/Reminder Notice 8129321 September 25, 2024 Informal State Public Notification requested 8129322 October 10, 2024 Resolving State Compliance achieved 8129323 June 25, 2025 Informal State Public Notification received Monitoring or reporting · Archived
Monitoring and Reporting (DBP)Violation 7136616 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2023 · period end December 31, 2025 · first reported November 21, 2025 · EPA return-to-compliance field December 31, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8129325 October 14, 2025 Informal State Violation/Reminder Notice 8129326 October 14, 2025 Informal State Public Notification requested 8129327 June 10, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 7136612 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2022 · period end June 27, 2023 · first reported February 28, 2023 · EPA return-to-compliance field June 27, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8129315 January 24, 2023 Informal State Violation/Reminder Notice 8129317 June 27, 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