MT0000022 · Montana
WORDEN BALLANTINE YELLOWSTONE
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 10
- EPA health-based flag
- 5
- Health-based records unresolved in this snapshot
- 1
- Monitoring and reporting records
- 3
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 4 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 51.5 days. The interval uses the reporting periods and dates on file.
EPA health-based flag · Unaddressed by formal action
Failure to Filter (SWTR)Violation 1543165 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start March 22, 2021 · first reported November 15, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5402 March 22, 2021 Informal State Violation/Reminder Notice 5403 March 22, 2021 Informal State Public Notification requested EPA health-based flag · Archived
Maximum Contaminant Level Violation, Single SampleViolation 1543171 · Nitrate-Nitrite · Nitrate RuleNoncompliance period start April 1, 2025 · period end June 30, 2025 · first reported August 18, 2025 · EPA return-to-compliance field June 30, 2025
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5422 August 7, 2019 Informal State Other 5425 June 29, 2020 Formal State Administrative/Compliance Order without penalty issued 5419 July 10, 2025 Informal State Violation/Reminder Notice 5420 July 10, 2025 Informal State Public Notification requested 5423 July 14, 2025 Informal State Public Notification received EPA health-based flag · Archived
Maximum Contaminant Level Violation, Single SampleViolation 1543170 · Nitrate-Nitrite · Nitrate RuleNoncompliance period start January 1, 2025 · period end March 31, 2025 · first reported May 15, 2025 · EPA return-to-compliance field March 31, 2025
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5418 August 7, 2019 Informal State Other 5425 June 29, 2020 Formal State Administrative/Compliance Order without penalty issued 5415 April 11, 2025 Informal State Violation/Reminder Notice 5416 April 11, 2025 Informal State Public Notification requested Monitoring or reporting · Unaddressed by formal action
Lead Consumer NoticeViolation 1543169 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2024 · first reported February 18, 2025
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5413 February 4, 2025 Informal State Violation/Reminder Notice Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 1543167 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start October 1, 2024 · period end December 26, 2024 · first reported December 19, 2024 · EPA return-to-compliance field December 26, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5408 October 1, 2024 Informal State Violation/Reminder Notice 5409 December 26, 2024 Resolving State Compliance achieved EPA health-based flag · Archived
Maximum Contaminant Level Violation, Single SampleViolation 1543166 · Nitrate-Nitrite · Nitrate RuleNoncompliance period start January 1, 2024 · period end March 31, 2024 · first reported May 16, 2024 · EPA return-to-compliance field March 31, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5407 August 7, 2019 Informal State Other 5392 June 29, 2020 Formal State Administrative/Compliance Order without penalty issued 5404 April 2, 2024 Informal State Violation/Reminder Notice 5405 April 2, 2024 Informal State Public Notification requested Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 1543164 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2022 · period end July 18, 2022 · first reported September 22, 2023 · EPA return-to-compliance field July 18, 2022
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5400 July 11, 2022 Informal State Violation/Reminder Notice 5401 July 18, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 1543163 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2021 · period end January 14, 2022 · first reported September 22, 2023 · EPA return-to-compliance field January 14, 2022
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5398 January 4, 2022 Informal State Violation/Reminder Notice 5399 January 14, 2022 Resolving State Compliance achieved EPA health-based flag · Archived
Maximum Contaminant Level Violation, Single SampleViolation 1543162 · Nitrate-Nitrite · Nitrate RuleNoncompliance period start April 1, 2021 · period end June 30, 2021 · first reported September 22, 2023 · EPA return-to-compliance field June 30, 2021
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 5397 August 7, 2019 Informal State Other 5392 June 29, 2020 Formal State Administrative/Compliance Order without penalty issued 5396 June 4, 2021 Informal State Public Notification received 5393 June 9, 2021 Informal State Violation/Reminder Notice 5394 June 9, 2021 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring, RegularViolation 1543168 · Asbestos · Inorganic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2022 · first reported November 18, 2024 · 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 5410 January 24, 2023 Informal State Violation/Reminder Notice 5411 January 24, 2023 Informal State Public Notification requested 5412 December 22, 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