IL0311800 · Illinois
MATTESON
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 11
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 7
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.
Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 7013823 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start January 15, 2026 · first reported May 27, 2026
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208138 February 13, 2026 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Notification, Known or Potential LSLViolation 7013820 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start July 2, 2025 · period end January 5, 2026 · first reported November 21, 2025 · EPA return-to-compliance field January 5, 2026
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208133 July 3, 2025 Informal State Violation/Reminder Notice 5208134 July 3, 2025 Informal State Public Notification requested 5208140 January 5, 2026 Resolving State Compliance achieved Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Inadequate ReportingViolation 7013822 · 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 5208137 September 22, 2025 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 7013821 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start July 1, 2025 · period end December 18, 2025 · first reported November 21, 2025 · EPA return-to-compliance field December 18, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208135 July 29, 2025 Informal State Violation/Reminder Notice 5208136 July 29, 2025 Informal State Public Notification requested 5208139 December 18, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 7013818 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2024 · period end December 31, 2024 · first reported February 27, 2025 · EPA return-to-compliance field December 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208128 January 14, 2025 Informal State Violation/Reminder Notice 5208129 January 14, 2025 Informal State Public Notification requested 5208130 April 10, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 7013817 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2024 · period end December 31, 2024 · first reported February 27, 2025 · EPA return-to-compliance field December 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208128 January 14, 2025 Informal State Violation/Reminder Notice 5208129 January 14, 2025 Informal State Public Notification requested 5208130 April 10, 2025 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 7013816 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start August 13, 2024 · period end June 26, 2024 · first reported November 21, 2024 · EPA return-to-compliance field June 26, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208126 June 26, 2024 Resolving State Compliance achieved 5208123 September 19, 2024 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 7013815 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start August 13, 2024 · period end June 26, 2024 · first reported November 21, 2024 · EPA return-to-compliance field June 26, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208124 June 26, 2024 Resolving State Compliance achieved 5208122 September 19, 2024 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 7013813 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start May 1, 2023 · period end May 31, 2023 · first reported August 29, 2023 · EPA return-to-compliance field May 31, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208121 June 26, 2023 Resolving State Compliance achieved 5208116 August 13, 2023 Informal State Violation/Reminder Notice 5208117 August 13, 2023 Informal State Public Notification requested 5208127 July 8, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 7013814 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2023 · period end June 26, 2023 · first reported August 29, 2023 · EPA return-to-compliance field June 26, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208120 June 26, 2023 Resolving State Compliance achieved 5208118 August 13, 2023 Informal State Violation/Reminder Notice 5208119 August 13, 2023 Informal State Public Notification requested 5208125 July 8, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 7013810 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2020 · period end March 12, 2021 · first reported March 11, 2021 · EPA return-to-compliance field March 12, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5208107 January 6, 2021 Informal State Violation/Reminder Notice 5208108 March 12, 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