MT0002540 · Montana

HIGH QUALITY H2O

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

Violation records shown: 3
EPA health-based flag: 3
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 0

Counties listed by EPA · Missoula 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 3 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 132 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Resolved

Failure To Address ContaminationViolation 1402248 · Groundwater Rule · Ground Water Rule

Noncompliance period start October 4, 2022 · period end August 27, 2024 · first reported September 22, 2023 · EPA return-to-compliance field August 27, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5567432	October 4, 2022	Informal	State Violation/Reminder Notice
5567433	October 4, 2022	Informal	State Violation/Reminder Notice
5567434	October 4, 2022	Informal	State Public Notification requested
5567436	August 27, 2024	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, E. coli (RTCR)Violation 1402245 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start February 1, 2022 · period end February 28, 2022 · first reported September 22, 2023 · EPA return-to-compliance field February 28, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5567420	February 23, 2022	Informal	State Violation/Reminder Notice
5567421	February 23, 2022	Informal	State Public Notification requested
5567422	February 24, 2022	Informal	State Public Notification received
5567423	March 16, 2022	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Failure To Address DeficiencyViolation 1402244 · Groundwater Rule · Ground Water Rule

Noncompliance period start July 10, 2021 · period end November 19, 2021 · first reported September 22, 2023 · EPA return-to-compliance field November 19, 2021

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5567414	November 8, 2021	Informal	State Violation/Reminder Notice
5567415	November 8, 2021	Informal	State Violation/Reminder Notice
5567416	November 8, 2021	Informal	State Public Notification requested
5567417	November 18, 2021	Informal	State Public Notification received
5567418	November 19, 2021	Resolving	State Compliance achieved
5567419	November 19, 2021	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