WI1530061 · Wisconsin

LONE ROCK 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: 0
Monitoring and reporting records: 2

Counties listed by EPA · Richland 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 30 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Resolved

Monitoring, RegularViolation 2400020 · Nitrate · Nitrate Rule

Noncompliance period start October 1, 2023 · period end October 31, 2023 · first reported August 28, 2025 · EPA return-to-compliance field October 31, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2400043	November 8, 2023	Informal	State Violation/Reminder Notice
2400044	November 8, 2023	Informal	State Public Notification requested
2400045	November 14, 2023	Resolving	State Compliance achieved
2400046	June 13, 2024	Informal	State Public Notification received

Monitoring or reporting · Resolved

Lead Consumer NoticeViolation 2100016 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start February 1, 2021 · period end March 3, 2021 · first reported May 26, 2021 · EPA return-to-compliance field March 3, 2021

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2100037	February 26, 2021	Informal	State Violation/Reminder Notice
2100041	March 3, 2021	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Public EducationViolation 2100015 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start November 1, 2020 · period end March 1, 2021 · first reported March 3, 2021 · EPA return-to-compliance field March 1, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2100038	February 26, 2021	Informal	State Violation/Reminder Notice
2100039	February 26, 2021	Informal	State Public Notification requested
2100040	March 1, 2021	Resolving	State Compliance achieved
2100042	March 15, 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