WI2410172 · Wisconsin
OAK CREEK WATERWORKS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 4
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 2
Counties listed by EPA · Milwaukee 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 3 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 89 days. The interval uses the reporting periods and dates on file.
Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 2500234 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start October 17, 2024 · first reported August 28, 2025
No linked action row appears in the records shown.EPA health-based flag · Resolved
LSL InventoryViolation 2500233 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · period end May 29, 2025 · first reported August 28, 2025 · EPA return-to-compliance field May 29, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500072 May 29, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 2100216 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2021 · period end March 31, 2021 · first reported May 26, 2021 · EPA return-to-compliance field March 31, 2021
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300067 April 6, 2021 Resolving State Compliance achieved 2100065 April 20, 2021 Informal State Violation/Reminder Notice 2100066 April 20, 2021 Informal State Public Notification requested 2300068 June 18, 2021 Informal State Public Notification received 2300069 March 21, 2023 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 2100215 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2021 · period end March 31, 2021 · first reported May 26, 2021 · EPA return-to-compliance field March 31, 2021
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300067 April 6, 2021 Resolving State Compliance achieved 2100065 April 20, 2021 Informal State Violation/Reminder Notice 2100066 April 20, 2021 Informal State Public Notification requested 2300068 June 18, 2021 Informal State Public Notification received 2300069 March 21, 2023 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