MT0000362 · Montana

WILSALL WATER DISTRICT

Federal fiscal 2026Q3 · EPA violation and follow-up records

Violation records shown: 5
EPA health-based flag: 3
Health-based records unresolved in this snapshot: 1
Monitoring and reporting records: 2

Counties listed by EPA · Park County, Montana

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 29.5 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Addressed by formal action

Failure to Filter (SWTR)Violation 4140624 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start October 3, 2019 · first reported December 19, 2019

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4856236	October 3, 2019	Informal	State Violation/Reminder Notice
4856237	October 3, 2019	Informal	State Public Notification requested
4856256	October 3, 2019	Resolving	State Compliance achieved
4856238	June 17, 2020	Informal	State Other
4856239	August 26, 2020	Formal	State Administrative/Compliance Order without penalty issued

EPA health-based flag · Resolved

Treatment Technique (SWTR and GWR)Violation 4140628 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start October 1, 2025 · period end October 31, 2025 · first reported January 5, 2026 · EPA return-to-compliance field October 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4856252	November 6, 2025	Informal	State Violation/Reminder Notice
4856253	November 6, 2025	Informal	State Public Notification requested
4856255	November 6, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Treatment Technique (SWTR and GWR)Violation 4140627 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start September 1, 2025 · period end September 30, 2025 · first reported November 17, 2025 · EPA return-to-compliance field September 30, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4856248	November 6, 2025	Informal	State Violation/Reminder Notice
4856249	November 6, 2025	Informal	State Public Notification requested
4856251	November 6, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 4140626 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start September 1, 2025 · period end September 30, 2025 · first reported November 17, 2025 · EPA return-to-compliance field September 30, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4856244	November 6, 2025	Informal	State Violation/Reminder Notice
4856245	November 6, 2025	Informal	State Public Notification requested
4856247	November 6, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 4140625 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start August 1, 2025 · period end August 31, 2025 · first reported November 17, 2025 · EPA return-to-compliance field August 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4856240	November 6, 2025	Informal	State Violation/Reminder Notice
4856241	November 6, 2025	Informal	State Public Notification requested
4856243	November 6, 2025	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