IL0311770 · Illinois
MARKHAM
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 9
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 5
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 8 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 90 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Notification, Known or Potential LSLViolation 5360123 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start July 2, 2025 · period end November 10, 2025 · first reported November 21, 2025 · EPA return-to-compliance field November 10, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8218545 July 3, 2025 Informal State Violation/Reminder Notice 8218546 July 3, 2025 Informal State Public Notification requested 8218553 November 10, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 5360125 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2025 · period end September 30, 2025 · first reported November 21, 2025 · EPA return-to-compliance field September 30, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8218548 October 14, 2025 Informal State Violation/Reminder Notice 8218549 October 14, 2025 Informal State Public Notification requested 8218550 October 30, 2025 Resolving State Compliance achieved Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Inadequate ReportingViolation 5360124 · 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 8218547 August 5, 2025 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 5360120 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2023 · period end July 11, 2023 · first reported November 28, 2023 · EPA return-to-compliance field July 11, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8218540 July 11, 2023 Resolving State Compliance achieved 8218537 July 24, 2023 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 5360122 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start June 15, 2023 · period end June 20, 2024 · first reported August 29, 2023 · EPA return-to-compliance field June 20, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8218539 August 10, 2023 Informal State Violation/Reminder Notice 8218543 June 20, 2024 Resolving State Compliance achieved Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 5360121 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start June 15, 2023 · period end June 20, 2024 · first reported August 29, 2023 · EPA return-to-compliance field June 20, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8218538 August 10, 2023 Informal State Violation/Reminder Notice 8218541 June 20, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 5360118 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start May 1, 2022 · period end May 31, 2022 · first reported July 28, 2022 · EPA return-to-compliance field May 31, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8218532 June 14, 2022 Informal State Violation/Reminder Notice 8218533 June 14, 2022 Informal State Public Notification requested 8218536 June 23, 2022 Resolving State Compliance achieved 8218544 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 5360119 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2022 · period end June 23, 2022 · first reported July 28, 2022 · EPA return-to-compliance field June 23, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8218534 June 14, 2022 Informal State Violation/Reminder Notice 8218535 June 14, 2022 Informal State Public Notification requested 8218536 June 23, 2022 Resolving State Compliance achieved 8218542 June 24, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 5360117 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2020 · period end March 29, 2021 · first reported March 11, 2021 · EPA return-to-compliance field March 29, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 8218530 January 6, 2021 Informal State Violation/Reminder Notice 8218531 March 29, 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