MT0004714 · Montana
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Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 6
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 4
Counties listed by EPA · Yellowstone 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 6 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 35 days. The interval uses the reporting periods and dates on file.
Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 10 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2026 · period end August 10, 2026 · first reported September 24, 2026 · EPA return-to-compliance field August 10, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 23 July 2, 2026 Informal State Violation/Reminder Notice 24 August 10, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 9 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start December 1, 2025 · period end December 31, 2025 · first reported February 25, 2026 · EPA return-to-compliance field December 31, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 19 January 22, 2026 Informal State Violation/Reminder Notice 20 January 22, 2026 Informal State Public Notification requested 22 January 22, 2026 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 8 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · period end July 29, 2025 · first reported September 23, 2025 · EPA return-to-compliance field July 29, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 17 July 17, 2025 Informal State Violation/Reminder Notice 18 July 29, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 5 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start February 1, 2024 · period end February 29, 2024 · first reported March 20, 2024 · EPA return-to-compliance field February 29, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 13 March 11, 2024 Resolving State Compliance achieved 10 March 18, 2024 Informal State Violation/Reminder Notice 11 March 18, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 7 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2024 · period end December 31, 2024 · first reported February 18, 2025 · EPA return-to-compliance field December 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 14 January 23, 2025 Informal State Violation/Reminder Notice 15 January 23, 2025 Informal State Public Notification requested 16 January 23, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 6 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2024 · period end December 31, 2024 · first reported February 18, 2025 · EPA return-to-compliance field December 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 14 January 23, 2025 Informal State Violation/Reminder Notice 15 January 23, 2025 Informal State Public Notification requested 16 January 23, 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