MT0000291 · Montana

MILES CITY CITY OF

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

Violation records shown: 6
EPA health-based flag: 3
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 3

Counties listed by EPA · Custer 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 5 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 of Treatment (SWTR-Filter)Violation 4490417 · Long Term 2 Enhanced Surface Water Treatment Rule · Long Term 2 Enhanced Surface Water Treatment Rule

Noncompliance period start August 1, 2025 · period end August 31, 2025 · first reported September 23, 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
4482439	September 10, 2025	Resolving	State Compliance achieved
4482436	September 17, 2025	Informal	State Violation/Reminder Notice
4482437	September 17, 2025	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 4490416 · Long Term 2 Enhanced Surface Water Treatment Rule · Long Term 2 Enhanced Surface Water Treatment Rule

Noncompliance period start July 1, 2025 · period end July 31, 2025 · first reported September 23, 2025 · EPA return-to-compliance field July 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4482435	September 10, 2025	Resolving	State Compliance achieved
4482432	September 17, 2025	Informal	State Violation/Reminder Notice
4482433	September 17, 2025	Informal	State Public Notification requested

EPA health-based flag · Archived

Treatment Technique (SWTR and GWR)Violation 4490415 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start August 1, 2023 · period end August 31, 2023 · first reported September 22, 2023 · EPA return-to-compliance field August 31, 2023

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4482425	August 22, 2023	Resolving	State Compliance achieved
4482426	August 22, 2023	Informal	State Public Notification requested
4482427	August 22, 2023	Informal	State Public Notification received
4482428	August 22, 2023	Informal	State Violation/Reminder Notice
4482429	October 10, 2023	Informal	State Other
4482430	March 13, 2024	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Filter)Violation 4490414 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start December 1, 2022 · period end December 31, 2022 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4482421	February 16, 2023	Informal	State Violation/Reminder Notice
4482422	February 16, 2023	Resolving	State Compliance achieved
4482423	February 16, 2023	Informal	State Public Notification received
4482424	February 16, 2023	Informal	State Public Notification requested

EPA health-based flag · Resolved

Treatment Technique (SWTR and GWR)Violation 4490413 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start September 1, 2022 · period end September 30, 2022 · first reported September 22, 2023 · EPA return-to-compliance field September 30, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4482417	September 30, 2022	Resolving	State Compliance achieved
4482418	September 30, 2022	Informal	State Public Notification requested
4482419	September 30, 2022	Informal	State Public Notification received
4482420	September 30, 2022	Informal	State Violation/Reminder Notice

EPA health-based flag · Resolved

Treatment Technique (SWTR and GWR)Violation 4490412 · Surface Water Treatment Rule · Surface Water Treatment Rule

Noncompliance period start August 1, 2022 · period end August 31, 2022 · first reported September 22, 2023 · EPA return-to-compliance field August 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4482413	September 2, 2022	Informal	State Public Notification requested
4482414	September 2, 2022	Informal	State Public Notification received
4482415	September 2, 2022	Informal	State Violation/Reminder Notice
4482416	September 2, 2022	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