WI2681741 · Wisconsin
MUSKEGO WATER UTILITY
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 5
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 2
Counties listed by EPA · Waukesha County, Wisconsin
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 4 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 160 days. The interval uses the reporting periods and dates on file.
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 2500128 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start October 17, 2024 · period end April 10, 2026 · first reported August 28, 2025 · EPA return-to-compliance field April 10, 2026
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2600106 April 10, 2026 Resolving State Compliance achieved EPA health-based flag · Resolved
LSL InventoryViolation 2500127 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · period end May 19, 2025 · first reported August 28, 2025 · EPA return-to-compliance field May 19, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500102 May 19, 2025 Resolving State Compliance achieved 2600105 April 10, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 2400109 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start January 1, 2024 · period end April 16, 2024 · first reported August 28, 2025 · EPA return-to-compliance field April 16, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400087 April 16, 2024 Resolving State Compliance achieved 2400088 April 17, 2024 Informal State Violation/Reminder Notice Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 2400110 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start July 1, 2023 · first reported August 28, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500094 March 11, 2025 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 2300108 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2023 · period end June 30, 2023 · first reported August 28, 2025 · EPA return-to-compliance field June 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500093 July 24, 2023 Resolving State Compliance achieved 2500095 March 11, 2025 Informal State Violation/Reminder Notice 2500096 March 11, 2025 Informal State Public Notification requested
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