WI1130239 · Wisconsin
MAZOMANIE WATERWORKS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 3
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 1
Counties listed by EPA · Dane 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 37 days. The interval uses the reporting periods and dates on file.
Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 2400011 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2024 · period end August 7, 2024 · first reported August 28, 2025 · EPA return-to-compliance field August 7, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400016 August 7, 2024 Resolving State Compliance achieved 2400018 August 12, 2024 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 2400010 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2024 · period end August 7, 2024 · first reported August 28, 2025 · EPA return-to-compliance field August 7, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400015 August 7, 2024 Resolving State Compliance achieved 2400017 August 12, 2024 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2100009 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start October 1, 2020 · period end October 31, 2020 · first reported March 3, 2021 · EPA return-to-compliance field October 31, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2100011 November 17, 2020 Informal State Violation/Reminder Notice 2100012 November 17, 2020 Informal State Public Notification requested 2100013 November 17, 2020 Resolving State Compliance achieved 2100014 February 18, 2021 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