SD4600077 · South Dakota
BUFFALO GAP
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 9
- EPA health-based flag
- 2
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 7
Counties listed by EPA · Custer County, South Dakota
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 9 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 90 days. The interval uses the reporting periods and dates on file.
EPA health-based flag · Resolved
Treatment Technique No Certif. OperatorViolation 2500354 · Stage 1 Disinfectants and Disinfection Byproducts Rule · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 7, 2025 · period end February 5, 2026 · first reported December 9, 2025 · EPA return-to-compliance field February 5, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500517 July 7, 2025 Informal State Violation/Reminder Notice 2500520 February 5, 2026 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 2500355 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2025 · period end September 30, 2025 · first reported December 9, 2025 · EPA return-to-compliance field September 30, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2500518 October 31, 2025 Informal State Public Notification requested 2500519 July 1, 2026 Resolving State Compliance achieved EPA health-based flag · Resolved
Treatment Technique No Certif. OperatorViolation 2400353 · Stage 1 Disinfectants and Disinfection Byproducts Rule · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start May 21, 2024 · period end January 30, 2025 · first reported November 21, 2024 · EPA return-to-compliance field January 30, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400507 May 21, 2024 Informal State Violation/Reminder Notice 2400516 January 30, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2400352 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start December 1, 2023 · period end December 31, 2023 · first reported February 22, 2024 · EPA return-to-compliance field December 31, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400506 January 9, 2024 Informal State Public Notification requested 2400515 May 29, 2024 Informal State Public Notification received 2400512 December 19, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2400350 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start October 1, 2023 · period end October 31, 2023 · first reported February 22, 2024 · EPA return-to-compliance field October 31, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2400504 November 7, 2023 Informal State Public Notification requested 2400514 May 29, 2024 Informal State Public Notification received 2400511 December 19, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 2300351 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start October 1, 2023 · period end August 7, 2024 · first reported February 22, 2024 · EPA return-to-compliance field August 7, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300505 December 5, 2023 Informal State Public Notification requested 2300510 August 7, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 2300349 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2023 · period end June 30, 2023 · first reported November 15, 2023 · EPA return-to-compliance field June 30, 2023
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300502 May 5, 2023 Informal State Public Notification requested 2300509 April 10, 2024 Resolving State Compliance achieved 2300513 May 29, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 2300348 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start April 1, 2023 · period end April 30, 2023 · first reported November 15, 2023 · EPA return-to-compliance field April 30, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300501 May 5, 2023 Informal State Public Notification requested 2300503 June 1, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 2300347 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2023 · period end March 31, 2023 · first reported May 22, 2023 · EPA return-to-compliance field March 31, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 2300500 April 21, 2023 Informal State Public Notification requested 2300508 April 10, 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