MN1740008 · Minnesota

Thompson Oaks

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

Violation records shown: 12
EPA health-based flag: 9
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 2

Counties listed by EPA · Steele County, Minnesota

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 90 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 846662 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2026 · period end June 30, 2026 · first reported September 1, 2026 · EPA return-to-compliance field June 30, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
846662SFJ	August 24, 2026	Informal	State Formal Notice of Violation issued
846662SIB	August 24, 2026	Informal	State Compliance Meeting conducted
846662SIE	August 24, 2026	Informal	State Public Notification requested

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 835913 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported May 28, 2026 · EPA return-to-compliance field March 31, 2026

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
835913SFJ	April 27, 2026	Informal	State Formal Notice of Violation issued
835913SIB	April 27, 2026	Informal	State Compliance Meeting conducted
835913SIE	April 27, 2026	Informal	State Public Notification requested
842409SIF	July 1, 2026	Informal	State Public Notification received
843440SFL	July 21, 2026	Formal	State Administrative/Compliance Order without penalty issued
843454SIF	July 21, 2026	Informal	State Public Notification received

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 829608 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start October 1, 2025 · period end December 31, 2025 · first reported February 25, 2026 · EPA return-to-compliance field December 31, 2025

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
829608SFJ	January 8, 2026	Informal	State Formal Notice of Violation issued
829608SIB	January 8, 2026	Informal	State Compliance Meeting conducted
829608SIE	January 8, 2026	Informal	State Public Notification requested
834032SIF	March 14, 2026	Informal	State Public Notification received
843441SFL	July 21, 2026	Formal	State Administrative/Compliance Order without penalty issued

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 825796 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2025 · period end September 30, 2025 · first reported February 25, 2026 · EPA return-to-compliance field September 30, 2025

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
825796SFJ	October 28, 2025	Informal	State Formal Notice of Violation issued
825796SIB	October 28, 2025	Informal	State Compliance Meeting conducted
825796SIE	October 28, 2025	Informal	State Public Notification requested
828802SIF	December 15, 2025	Informal	State Public Notification received
843442SFL	July 21, 2026	Formal	State Administrative/Compliance Order without penalty issued

Other or unclassified · Resolved

Public Notification Violation for NPDWR ViolationViolation 813038 · Public Notice · Public Notice Rule and Revised PN Rule

Noncompliance period start April 28, 2025 · period end May 16, 2025 · first reported November 25, 2025 · EPA return-to-compliance field May 16, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
813038SFJ	May 16, 2025	Informal	State Formal Notice of Violation issued
813198SOX	May 16, 2025	Resolving	State Compliance achieved

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 818448 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2025 · period end June 30, 2025 · first reported February 25, 2026 · 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
818448SFJ	August 1, 2025	Informal	State Formal Notice of Violation issued
818448SIB	August 1, 2025	Informal	State Compliance Meeting conducted
818448SIE	August 1, 2025	Informal	State Public Notification requested
822533SIF	September 10, 2025	Informal	State Public Notification received
843443SFL	July 21, 2026	Formal	State Administrative/Compliance Order without penalty issued

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 813291 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2025 · period end March 31, 2025 · first reported February 25, 2026 · EPA return-to-compliance field March 31, 2025

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
813199SIF	May 16, 2025	Informal	State Public Notification received
813291SFJ	May 27, 2025	Informal	State Formal Notice of Violation issued
813291SIB	May 27, 2025	Informal	State Compliance Meeting conducted
813291SIE	May 27, 2025	Informal	State Public Notification requested
843444SFL	July 21, 2026	Formal	State Administrative/Compliance Order without penalty issued

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 809678 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start October 1, 2024 · period end December 31, 2024 · first reported May 29, 2025 · EPA return-to-compliance field December 31, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
809678SFJ	March 19, 2025	Informal	State Formal Notice of Violation issued
809678SIB	March 19, 2025	Informal	State Compliance Meeting conducted
809678SIE	March 19, 2025	Informal	State Public Notification requested
843445SFL	July 21, 2026	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 7744354010 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2023 · period end June 30, 2023 · first reported December 6, 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
774435SFJ	August 9, 2023	Informal	State Formal Notice of Violation issued
774435SIE	August 9, 2023	Informal	State Public Notification requested
782214SOX	August 22, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 7744354000 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2023 · period end June 30, 2023 · first reported December 6, 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
774435SFJ	August 9, 2023	Informal	State Formal Notice of Violation issued
774435SIE	August 9, 2023	Informal	State Public Notification requested
782214SOX	August 22, 2023	Resolving	State Compliance achieved

EPA health-based flag · Archived

Maximum Contaminant Level Violation, AverageViolation 774434 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2023 · period end March 31, 2023 · first reported February 25, 2026 · EPA return-to-compliance field March 31, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
774434SFJ	August 9, 2023	Informal	State Formal Notice of Violation issued
774434SIB	August 9, 2023	Informal	State Compliance Meeting conducted
774434SIE	August 9, 2023	Informal	State Public Notification requested
778085SIF	September 15, 2023	Informal	State Public Notification received

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 57274 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2020 · period end September 30, 2020 · first reported March 9, 2021 · EPA return-to-compliance field September 30, 2020

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
719283	October 20, 2020	Informal	State Public Notification received
719284	February 1, 2021	Informal	State Formal Notice of Violation issued
719285	February 1, 2021	Informal	State Compliance Meeting conducted
719286	February 1, 2021	Informal	State Public Notification requested
729821	March 3, 2021	Formal	State Administrative/Compliance Order without penalty issued
804217SOX	January 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