MT0003978 · Montana
TWIN HILLS COLONY INC
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 10
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 10
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 8 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 33 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 1339 · 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 2190 July 22, 2026 Informal State Violation/Reminder Notice 2191 July 22, 2026 Informal State Public Notification requested Monitoring or reporting · Archived
Monitoring of Treatment (SWTR-Filter)Violation 1338 · 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 2186 July 22, 2026 Informal State Violation/Reminder Notice 2187 July 22, 2026 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 1337 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start January 1, 2025 · period end January 31, 2025 · first reported August 24, 2026 · EPA return-to-compliance field January 31, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2185 March 10, 2025 Resolving State Compliance achieved 2182 March 31, 2025 Informal State Violation/Reminder Notice 2183 March 31, 2025 Informal State Public Notification requested Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 1336 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2024 · period end February 4, 2025 · first reported February 18, 2025 · EPA return-to-compliance field February 4, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2180 February 4, 2025 Informal State Violation/Reminder Notice 2181 February 4, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 1335 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start July 1, 2024 · period end July 31, 2024 · first reported September 19, 2024 · EPA return-to-compliance field July 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2176 August 22, 2024 Informal State Violation/Reminder Notice 2177 August 22, 2024 Informal State Public Notification requested 2179 August 22, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 1334 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start June 1, 2024 · period end June 30, 2024 · first reported September 19, 2024 · EPA return-to-compliance field June 30, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2172 August 22, 2024 Informal State Violation/Reminder Notice 2173 August 22, 2024 Informal State Public Notification requested 2175 August 22, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 1333 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start January 1, 2024 · period end January 31, 2024 · first reported March 20, 2024 · EPA return-to-compliance field January 31, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2168 February 13, 2024 Informal State Violation/Reminder Notice 2169 February 13, 2024 Informal State Public Notification requested 2171 February 14, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 1332 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2022 · period end December 31, 2022 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2022
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2167 January 9, 2023 Resolving State Compliance achieved 2165 January 20, 2023 Informal State Violation/Reminder Notice 2166 January 20, 2023 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 1331 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start October 1, 2022 · period end December 31, 2022 · first reported September 22, 2023 · EPA return-to-compliance field December 31, 2022
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2167 January 9, 2023 Resolving State Compliance achieved 2165 January 20, 2023 Informal State Violation/Reminder Notice 2166 January 20, 2023 Informal State Public Notification requested Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 1330 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2021 · period end February 14, 2022 · first reported September 22, 2023 · EPA return-to-compliance field February 14, 2022
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2163 January 4, 2022 Informal State Violation/Reminder Notice 2164 February 14, 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