MT0000318 · Montana
RONAN CITY OF
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 24
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 24
Counties listed by EPA · Lake 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 24 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 333 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 4104430 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start April 1, 2025 · period end April 30, 2025 · first reported June 23, 2025 · EPA return-to-compliance field April 30, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485667 June 5, 2025 Informal State Violation/Reminder Notice 4485668 June 5, 2025 Informal State Public Notification requested 4485670 June 5, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 4104429 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start March 1, 2024 · period end March 31, 2024 · first reported June 23, 2025 · EPA return-to-compliance field March 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485663 June 5, 2025 Informal State Violation/Reminder Notice 4485664 June 5, 2025 Informal State Public Notification requested 4485666 June 5, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 4104407 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start December 1, 2023 · period end December 31, 2023 · first reported February 15, 2024 · EPA return-to-compliance field December 31, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485656 January 23, 2024 Informal State Violation/Reminder Notice 4485657 January 23, 2024 Informal State Public Notification requested 4485659 January 30, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104428 · Styrene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104427 · Ethylbenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104426 · Toluene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104425 · Benzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104424 · CHLOROBENZENE · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104423 · Tetrachloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104422 · 1,1,2-Trichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104421 · Trichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104420 · 1,2-Dichloropropane · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104419 · Carbon tetrachloride · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104418 · 1,1,1-Trichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104417 · 1,2-Dichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104416 · trans-1,2-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104415 · 1,1-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104414 · Vinyl chloride · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104413 · p-Dichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104412 · o-Dichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104411 · DICHLOROMETHANE · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104410 · Xylenes, Total · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104409 · cis-1,2-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 4104408 · 1,2,4-Trichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2023 · period end November 30, 2023 · first reported February 15, 2024 · EPA return-to-compliance field November 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 4485662 November 30, 2023 Resolving State Compliance achieved 4485660 January 31, 2024 Informal State Violation/Reminder Notice 4485661 January 31, 2024 Informal State Public Notification requested
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.
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