084690026 · South Dakota
MNI WICONI WTP / CORELINE
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 8
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 8
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 8 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 46.5 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 293 · CARBON, TOTAL · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start July 1, 2023 · period end September 30, 2023 · first reported December 19, 2023 · EPA return-to-compliance field September 30, 2023
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 259 February 22, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 288 · Surface Water Treatment Rule · Surface Water Treatment RuleNoncompliance period start November 1, 2022 · period end November 30, 2022 · first reported February 16, 2023 · EPA return-to-compliance field November 30, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 253 January 31, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 287 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start November 1, 2022 · period end November 30, 2022 · first reported February 16, 2023 · EPA return-to-compliance field November 30, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 254 December 7, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 286 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start September 29, 2022 · period end October 25, 2022 · first reported November 16, 2022 · EPA return-to-compliance field October 25, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 248 October 25, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 292 · Fluoride · Inorganic ChemicalsNoncompliance period start January 1, 2022 · period end December 31, 2022 · first reported June 26, 2023 · EPA return-to-compliance field December 31, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 260 July 27, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 290 · CYANIDE · Inorganic ChemicalsNoncompliance period start January 1, 2022 · period end December 31, 2022 · first reported June 26, 2023 · EPA return-to-compliance field December 31, 2022
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 260 July 27, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Lead Consumer NoticeViolation 225 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start December 30, 2020 · period end March 4, 2021 · first reported March 31, 2021 · EPA return-to-compliance field March 4, 2021
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 223 March 4, 2021 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 223 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start November 1, 2020 · period end November 30, 2020 · first reported February 11, 2021 · EPA return-to-compliance field November 30, 2020
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 222 December 9, 2020 Resolving State Compliance achieved 221 January 12, 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