WI1110111 · Wisconsin
RIO WATERWORKS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 3
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 1
- Monitoring and reporting records
- 1
Counties listed by EPA · Columbia 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 1 resolved record with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 22 days. The interval uses the reporting periods and dates on file.
EPA health-based flag · Unaddressed by formal action
LSL InventoryViolation 2500057 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start October 17, 2024 · first reported August 28, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 9999900000000000001 June 18, 2025 Informal Federal Violation/Reminder Notice Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 2500058 · 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.Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 2400042 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start January 1, 2024 · period end January 23, 2024 · first reported August 28, 2025 · EPA return-to-compliance field January 23, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400053 January 4, 2024 Informal State Violation/Reminder Notice 2400054 January 23, 2024 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