IL0310510 · Illinois
CICERO
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 8
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 4
Counties listed by EPA · Cook 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 7 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 115 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 1911007 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start January 1, 2026 · period end April 26, 2026 · first reported May 27, 2026 · EPA return-to-compliance field April 26, 2026
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1887126 January 27, 2026 Informal State Violation/Reminder Notice 1887127 January 27, 2026 Informal State Public Notification requested 1887133 April 26, 2026 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 1911006 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start August 22, 2025 · period end June 30, 2026 · first reported November 21, 2025 · EPA return-to-compliance field June 30, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1887125 September 24, 2025 Informal State Violation/Reminder Notice 1887131 June 30, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Notification, Known or Potential LSLViolation 1911003 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start July 2, 2025 · period end August 29, 2025 · first reported November 21, 2025 · EPA return-to-compliance field August 29, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1887122 July 3, 2025 Informal State Violation/Reminder Notice 1887123 July 3, 2025 Informal State Public Notification requested 1887134 August 29, 2025 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 1911005 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · period end December 10, 2025 · first reported November 21, 2025 · EPA return-to-compliance field December 10, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1887124 August 27, 2025 Informal State Violation/Reminder Notice 1887128 December 10, 2025 Resolving State Compliance achieved EPA health-based flag · Resolved
LSL InventoryViolation 1911002 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · period end December 10, 2025 · first reported August 18, 2025 · EPA return-to-compliance field December 10, 2025
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1887120 July 22, 2025 Informal State Violation/Reminder Notice 1887121 July 22, 2025 Informal State Public Notification requested 1887129 September 9, 2025 Resolving State Compliance achieved 1887128 December 10, 2025 Resolving State Compliance achieved Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 1911001 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start February 19, 2023 · first reported May 16, 2023
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1887119 April 17, 2023 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 1911000 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2022 · period end March 1, 2022 · first reported May 11, 2022 · EPA return-to-compliance field March 1, 2022
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1887115 February 18, 2022 Informal State Violation/Reminder Notice 1887116 February 18, 2022 Informal State Public Notification requested 1887117 March 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 1910999 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start January 1, 2022 · period end January 31, 2022 · first reported May 11, 2022 · EPA return-to-compliance field January 31, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1887113 February 18, 2022 Informal State Violation/Reminder Notice 1887114 February 18, 2022 Informal State Public Notification requested 1887117 March 1, 2022 Resolving State Compliance achieved 1887118 July 28, 2022 Informal State Public Notification received
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