MT0000520 · Montana
CARTER CHOUTEAU CO WATER DIST
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 30
- EPA health-based flag
- 1
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 29
Counties listed by EPA · Chouteau 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 22 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 364 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 1031177 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start June 1, 2026 · period end June 30, 2026 · first reported August 24, 2026 · EPA return-to-compliance field June 30, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601181 July 28, 2026 Informal State Violation/Reminder Notice 5601182 July 28, 2026 Informal State Public Notification requested Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 1031176 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start May 1, 2026 · period end May 31, 2026 · first reported August 24, 2026 · EPA return-to-compliance field May 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601177 June 18, 2026 Informal State Violation/Reminder Notice 5601178 June 18, 2026 Informal State Public Notification requested Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 1031175 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start April 1, 2026 · period end April 30, 2026 · first reported August 24, 2026 · EPA return-to-compliance field April 30, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601173 June 18, 2026 Informal State Violation/Reminder Notice 5601174 June 18, 2026 Informal State Public Notification requested Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 1031174 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start March 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601169 April 1, 2026 Informal State Violation/Reminder Notice 5601170 April 1, 2026 Informal State Public Notification requested Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 1031173 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start February 1, 2026 · period end February 28, 2026 · first reported May 27, 2026 · EPA return-to-compliance field February 28, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601165 April 1, 2026 Informal State Violation/Reminder Notice 5601166 April 1, 2026 Informal State Public Notification requested Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 1031172 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start January 1, 2026 · period end January 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field January 31, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601161 April 1, 2026 Informal State Violation/Reminder Notice 5601162 April 1, 2026 Informal State Public Notification requested Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Unfilt/GWR)Violation 1031171 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start December 1, 2025 · period end December 31, 2025 · first reported February 25, 2026 · EPA return-to-compliance field December 31, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601157 January 22, 2026 Informal State Violation/Reminder Notice 5601158 January 22, 2026 Informal State Public Notification requested EPA health-based flag · Archived
Treatment Technique (SWTR and GWR)Violation 1031170 · Long Term 2 Enhanced Surface Water Treatment Rule · Long Term 2 Enhanced Surface Water Treatment RuleNoncompliance period start December 1, 2025 · period end December 31, 2025 · first reported February 25, 2026 · EPA return-to-compliance field December 31, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601153 January 22, 2026 Informal State Violation/Reminder Notice 5601154 January 22, 2026 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 1031146 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start February 1, 2021 · period end February 28, 2021 · first reported September 22, 2023 · EPA return-to-compliance field February 28, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601146 March 1, 2021 Resolving State Compliance achieved 5601143 March 17, 2021 Informal State Violation/Reminder Notice 5601144 March 17, 2021 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031167 · Styrene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031166 · Ethylbenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031165 · Toluene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031164 · Benzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031163 · CHLOROBENZENE · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031162 · Tetrachloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031161 · 1,1,2-Trichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031160 · Trichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031159 · 1,2-Dichloropropane · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031158 · Carbon tetrachloride · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031157 · 1,1,1-Trichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031156 · 1,2-Dichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031155 · trans-1,2-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031154 · 1,1-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031153 · Vinyl chloride · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031152 · p-Dichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031151 · o-Dichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031150 · DICHLOROMETHANE · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031149 · Xylenes, Total · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031148 · cis-1,2-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 1031147 · 1,2,4-Trichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2021 · period end December 31, 2021 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2021
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5601147 January 21, 2022 Informal State Violation/Reminder Notice 5601148 January 21, 2022 Informal State Public Notification requested 5601149 February 1, 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