WI7440129 · Wisconsin
THREE LAKES SANITARY DISTRICT
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 11
- EPA health-based flag
- 2
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 6
Counties listed by EPA · Oneida 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 9 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 29 days. The interval uses the reporting periods and dates on file.
Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 2500045 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · period end July 30, 2025 · first reported December 17, 2025 · EPA return-to-compliance field July 30, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500046 July 22, 2025 Informal State Violation/Reminder Notice 2500047 July 30, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2500043 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start March 1, 2025 · period end March 31, 2025 · first reported August 28, 2025 · EPA return-to-compliance field March 31, 2025
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500041 April 16, 2025 Resolving State Compliance achieved 2500042 June 10, 2025 Informal State Violation/Reminder Notice 2500043 June 10, 2025 Informal State Public Notification requested 2600049 July 1, 2025 Informal State Public Notification received EPA health-based flag · Resolved
Failure To Address DeficiencyViolation 2500041 · Groundwater Rule · Ground Water RuleNoncompliance period start January 16, 2025 · period end March 3, 2025 · first reported August 28, 2025 · EPA return-to-compliance field March 3, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500032 March 3, 2025 Resolving State Compliance achieved 2500033 March 12, 2025 Informal State Public Notification requested 2500034 March 13, 2025 Informal State Public Notification received Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 2500046 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start October 17, 2024 · first reported December 17, 2025
No linked action row appears in the records shown.Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 2500040 · 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 2500039 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · period end November 5, 2024 · first reported August 28, 2025 · EPA return-to-compliance field November 5, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500031 November 5, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
LSL ReportingViolation 2500038 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · period end November 5, 2024 · first reported August 28, 2025 · EPA return-to-compliance field November 5, 2024
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500027 November 5, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 2400008 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start January 1, 2024 · period end January 4, 2024 · first reported August 28, 2025 · EPA return-to-compliance field January 4, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400018 January 4, 2024 Resolving State Compliance achieved 2400019 January 10, 2024 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2300005 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start December 1, 2022 · period end December 31, 2022 · first reported August 28, 2025 · EPA return-to-compliance field December 31, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300012 January 10, 2023 Informal State Violation/Reminder Notice 2300013 January 10, 2023 Informal State Public Notification requested 2300015 January 11, 2023 Resolving State Compliance achieved 2400017 June 13, 2023 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2300004 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start November 1, 2022 · period end November 30, 2022 · first reported August 28, 2025 · EPA return-to-compliance field November 30, 2022
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300010 December 9, 2022 Informal State Violation/Reminder Notice 2300011 December 9, 2022 Informal State Public Notification requested 2300014 January 11, 2023 Resolving State Compliance achieved 2400016 June 13, 2023 Informal State Public Notification received Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 2100002 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start February 1, 2021 · period end March 17, 2021 · first reported May 26, 2021 · EPA return-to-compliance field March 17, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2100008 March 5, 2021 Informal State Violation/Reminder Notice 2100009 March 17, 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