SD4600225 · South Dakota

NISLAND

Federal fiscal 2026Q3 · EPA violation and follow-up records

Violation records shown: 14
EPA health-based flag: 0
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 13

Counties listed by EPA · Butte 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 11 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 30 days. The interval uses the reporting periods and dates on file.

Monitoring or reporting · Unaddressed by formal action
Notification, Known or Potential LSLViolation 2600334 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions
Noncompliance period start July 2, 2026 · first reported August 27, 2026
No linked action row appears in the records shown.

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 2600332 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start February 1, 2026 · period end February 28, 2026 · first reported June 17, 2026 · EPA return-to-compliance field February 28, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2600532	March 10, 2026	Informal	State Public Notification requested
2600535	July 2, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Archived
Monitoring and Reporting (DBP)Violation 2600333 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule
Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported June 17, 2026 · EPA return-to-compliance field March 31, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
2600533 April 30, 2026 Informal State Public Notification requested

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2600533	April 30, 2026	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 2600331 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start January 1, 2026 · period end January 31, 2026 · first reported June 17, 2026 · EPA return-to-compliance field January 31, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2600531	February 10, 2026	Informal	State Public Notification requested
2600534	July 2, 2026	Resolving	State Compliance achieved

Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 2500330 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start October 6, 2024 · first reported March 31, 2025
No linked action row appears in the records shown.

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 2400329 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start September 1, 2024 · period end September 30, 2024 · first reported November 21, 2024 · EPA return-to-compliance field September 30, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2400516	October 9, 2024	Informal	State Public Notification requested
2400530	November 6, 2024	Informal	State Public Notification received
2400523	December 19, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 2400328 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start August 1, 2024 · period end August 31, 2024 · first reported November 21, 2024 · EPA return-to-compliance field August 31, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2400515	September 6, 2024	Informal	State Public Notification requested
2400529	November 6, 2024	Informal	State Public Notification received
2400522	December 19, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 2400327 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start July 1, 2024 · period end July 31, 2024 · first reported November 21, 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
2400514	August 9, 2024	Informal	State Public Notification requested
2400528	November 6, 2024	Informal	State Public Notification received
2400521	December 19, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 2400325 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start June 1, 2024 · period end June 30, 2024 · first reported August 22, 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
2400512	June 1, 2024	Informal	State Public Notification requested
2400527	November 6, 2024	Informal	State Public Notification received
2400520	December 19, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 2400326 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2024 · period end June 30, 2024 · first reported August 22, 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
2400513	July 24, 2024	Informal	State Public Notification requested
2400517	November 6, 2024	Informal	State Public Notification issued
2400526	June 16, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 2400324 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance 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
2400511	January 9, 2024	Informal	State Public Notification requested
2400524	July 1, 2024	Informal	State Public Notification received
2400519	December 19, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 2400323 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance 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
2400510	November 7, 2023	Informal	State Public Notification requested
2400525	December 1, 2023	Informal	State Public Notification received
2400518	December 19, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 2100322 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2020 · period end December 31, 2020 · first reported January 25, 2021 · EPA return-to-compliance field December 31, 2020

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2100507	November 5, 2020	Informal	State Public Notification requested
2100508	October 4, 2021	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 2100321 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start October 1, 2020 · period end October 31, 2020 · first reported January 25, 2021 · EPA return-to-compliance field October 31, 2020

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
2100505	November 5, 2020	Informal	State Public Notification requested
2100506	December 1, 2020	Resolving	State Compliance achieved
2100509	March 8, 2021	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