MT0004047 · Montana
BUFFALO RANCH WATER COMPANY
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 25
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 25
Counties listed by EPA · Park 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 25 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 82 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring, RegularViolation 9 · Simazine · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 8 · OXAMYL · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 7 · Di(2-ethylhexyl) adipate · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 6 · Dalapon · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 5 · Toxaphene · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 4 · Methoxychlor · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 3 · BHC-GAMMA · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 25 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad RuleNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 7 April 16, 2026 Informal State Violation/Reminder Notice 8 April 16, 2026 Informal State Public Notification requested 9 June 16, 2026 Resolving State Compliance achieved 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 24 · Chlordane · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 23 · Pentachlorophenol · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 22 · Benzo(a)pyrene · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 21 · HEXACHLOROBENZENE · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 20 · 2,4,5-TP · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 2 · Endrin · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 19 · 2,4-D · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 18 · Heptachlor epoxide · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 17 · Heptachlor · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 16 · LASSO · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 15 · Atrazine · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 14 · Carbofuran · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 13 · Hexachlorocyclopentadiene · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 12 · Dinoseb · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 11 · Picloram · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 10 · Di(2-ethylhexyl) phthalate · Synthetic Organic ChemicalsNoncompliance period start January 1, 2026 · period end March 24, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 24, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 6 March 24, 2026 Resolving State Compliance achieved 4 April 16, 2026 Informal State Violation/Reminder Notice 5 April 16, 2026 Informal State Public Notification requested 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, RegularViolation 1 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad RuleNoncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 27, 2026 · EPA return-to-compliance field March 31, 2026
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 1 April 16, 2026 Informal State Violation/Reminder Notice 2 April 16, 2026 Informal State Public Notification requested 3 June 16, 2026 Resolving State Compliance achieved 10 July 28, 2026 Informal State Public Notification received 11 August 28, 2026 Informal State Public Notification received
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