IL0311980 · Illinois
MOUNT PROSPECT
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 12
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 10
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 91 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Archived
Monitoring, RegularViolation 7014044 · Toluene · Volatile Organic ChemicalsNoncompliance period start April 1, 2026 · period end June 30, 2026 · first reported August 27, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.Monitoring or reporting · Archived
Monitoring, RegularViolation 7014043 · Ethylbenzene · Volatile Organic ChemicalsNoncompliance period start April 1, 2026 · period end June 30, 2026 · first reported August 27, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.Monitoring or reporting · Archived
Monitoring, RegularViolation 7014042 · Benzene · Volatile Organic ChemicalsNoncompliance period start April 1, 2026 · period end June 30, 2026 · first reported August 27, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.Monitoring or reporting · Archived
Monitoring, RegularViolation 7014041 · Xylenes, Total · Volatile Organic ChemicalsNoncompliance period start April 1, 2026 · period end June 30, 2026 · first reported August 27, 2026 · EPA return-to-compliance field June 30, 2026
No linked action row appears in the records shown.Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Inadequate ReportingViolation 7014038 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · first reported November 21, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1453433 August 25, 2025 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 7014037 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · period end November 4, 2025 · first reported November 21, 2025 · EPA return-to-compliance field November 4, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1453431 August 25, 2025 Informal State Violation/Reminder Notice 1453434 November 4, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 7014036 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start December 1, 2024 · period end December 31, 2024 · first reported February 27, 2025 · EPA return-to-compliance field December 31, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1453425 January 21, 2025 Resolving State Compliance achieved 1453423 January 24, 2025 Informal State Violation/Reminder Notice 1453424 January 24, 2025 Informal State Public Notification requested 1453426 June 20, 2025 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 7014031 · Benzene · Volatile Organic ChemicalsNoncompliance 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 1453406 October 11, 2024 Informal State Violation/Reminder Notice 1453407 October 11, 2024 Informal State Public Notification requested 1453418 January 13, 2025 Resolving State Compliance achieved 1453428 June 20, 2025 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 7014029 · Ethylbenzene · Volatile Organic ChemicalsNoncompliance 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 1453421 October 11, 2024 Informal State Violation/Reminder Notice 1453422 October 11, 2024 Informal State Public Notification requested 1453418 January 13, 2025 Resolving State Compliance achieved 1453430 June 20, 2025 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 7014028 · Toluene · Volatile Organic ChemicalsNoncompliance 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 1453419 October 11, 2024 Informal State Violation/Reminder Notice 1453420 October 11, 2024 Informal State Public Notification requested 1453418 January 13, 2025 Resolving State Compliance achieved 1453429 June 20, 2025 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 7014027 · Xylenes, Total · Volatile Organic ChemicalsNoncompliance 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 1453416 October 11, 2024 Informal State Violation/Reminder Notice 1453417 October 11, 2024 Informal State Public Notification requested 1453418 January 13, 2025 Resolving State Compliance achieved 1453427 June 20, 2025 Informal State Public Notification received Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 7013956 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2020 · period end January 13, 2021 · first reported March 11, 2021 · EPA return-to-compliance field January 13, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1453401 January 6, 2021 Informal State Violation/Reminder Notice 1453402 January 13, 2021 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