MT0003808 · Montana
HILLSIDE VILLAGE
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 7
- 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 5 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 63 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Unaddressed by formal action
Monitoring and Reporting (DBP)Violation 5454340 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2026 · period end December 31, 2026 · first reported August 24, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1216978 July 14, 2026 Informal State Violation/Reminder Notice 1216979 July 14, 2026 Informal State Public Notification requested Monitoring or reporting · Unaddressed by formal action
Monitoring and Reporting (DBP)Violation 5454339 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2026 · period end December 31, 2026 · first reported August 24, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1216978 July 14, 2026 Informal State Violation/Reminder Notice 1216979 July 14, 2026 Informal State Public Notification requested Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 5454338 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start October 1, 2025 · period end October 6, 2025 · first reported January 5, 2026 · EPA return-to-compliance field October 6, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1216976 October 6, 2025 Informal State Violation/Reminder Notice 1216977 October 6, 2025 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 5454337 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · period end July 17, 2025 · first reported September 23, 2025 · EPA return-to-compliance field July 17, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1216974 July 17, 2025 Informal State Violation/Reminder Notice 1216975 July 17, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 5454336 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2024 · period end December 10, 2025 · first reported February 18, 2025 · EPA return-to-compliance field December 10, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1216972 February 4, 2025 Informal State Violation/Reminder Notice 1216973 December 10, 2025 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 5454335 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2022 · period end September 2, 2022 · first reported September 22, 2023 · EPA return-to-compliance field September 2, 2022
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1216969 July 11, 2022 Informal State Violation/Reminder Notice 1216970 September 2, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 5454334 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2021 · period end February 8, 2024 · first reported September 22, 2023 · EPA return-to-compliance field February 8, 2024
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1216967 January 4, 2022 Informal State Violation/Reminder Notice 1216968 January 28, 2022 Resolving State Compliance achieved 1216971 February 8, 2024 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