WI6630257 · Wisconsin
HILLSBORO WATERWORKS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 4
- EPA health-based flag
- 2
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 0
Counties listed by EPA · Vernon 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 36 days. The interval uses the reporting periods and dates on file.
Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 2300031 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2023 · period end July 31, 2023 · first reported August 28, 2025 · EPA return-to-compliance field July 31, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300089 July 20, 2023 Informal State Violation/Reminder Notice 2300091 July 31, 2023 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 2300030 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2023 · period end August 12, 2023 · first reported August 28, 2025 · EPA return-to-compliance field August 12, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300090 July 20, 2023 Informal State Violation/Reminder Notice 2300092 August 12, 2023 Resolving State Compliance achieved EPA health-based flag · Resolved
Public EducationViolation 2300029 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start March 11, 2023 · period end March 29, 2023 · first reported August 28, 2025 · EPA return-to-compliance field March 29, 2023
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300085 March 29, 2023 Resolving State Compliance achieved 2300086 April 27, 2023 Informal State Violation/Reminder Notice 2300087 April 27, 2023 Informal State Public Notification requested 2300088 May 16, 2023 Informal State Public Notification received EPA health-based flag · Resolved
OCCT/SOWT Study/RecommendationViolation 2100028 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start September 17, 2021 · period end November 4, 2021 · first reported December 2, 2021 · EPA return-to-compliance field November 4, 2021
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2200079 October 5, 2021 Informal State Violation/Reminder Notice 2200080 October 5, 2021 Informal State Public Notification requested 2200081 October 14, 2021 Informal State Public Notification received 2200082 November 3, 2021 Informal State Violation/Reminder Notice 2200083 November 4, 2021 Resolving State Compliance achieved 2200084 December 6, 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