084690510 · South Dakota

STANDING ROCK RURAL WATER SYSTEM

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

Violation records shown: 39
EPA health-based flag: 1
Health-based records unresolved in this snapshot: 1
Monitoring and reporting records: 37

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

EPA health-based flag · Unaddressed by formal action
Failure To Address DeficiencyViolation 22719 · Long Term 2 Enhanced Surface Water Treatment Rule · Long Term 2 Enhanced Surface Water Treatment Rule
Noncompliance period start October 19, 2024 · first reported February 24, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 22727 · Long Term 2 Enhanced Surface Water Treatment Rule · Long Term 2 Enhanced Surface Water Treatment Rule
Noncompliance period start February 1, 2026 · period end February 28, 2026 · first reported June 29, 2026 · EPA return-to-compliance field February 28, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3241 April 22, 2026 Resolving State Compliance achieved
Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 22721 · Long Term 2 Enhanced Surface Water Treatment Rule · Long Term 2 Enhanced Surface Water Treatment Rule
Noncompliance period start January 1, 2026 · period end January 31, 2026 · first reported June 29, 2026 · EPA return-to-compliance field January 31, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3241 April 22, 2026 Resolving State Compliance achieved
Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 22718 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start July 1, 2024 · period end April 1, 2026 · first reported October 21, 2024 · EPA return-to-compliance field April 1, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3231 August 14, 2024 Informal State Violation/Reminder Notice
3238 April 1, 2026 Resolving State Compliance achieved
Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Filter)Violation 22717 · Long Term 2 Enhanced Surface Water Treatment Rule · Long Term 2 Enhanced Surface Water Treatment Rule
Noncompliance period start April 1, 2023 · period end April 30, 2023 · first reported September 11, 2023 · EPA return-to-compliance field April 30, 2023

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
3230 June 29, 2023 Resolving State Compliance achieved
Monitoring or reporting · Archived
Monitoring, RegularViolation 22756 · Chlordane · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22755 · ETHYLENE DIBROMIDE · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22754 · 1,2-DIBROMO-3-CHLOROPROPANE · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22753 · Total Polychlorinated Biphenyls (PCB) · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22752 · Pentachlorophenol · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22751 · Benzo(a)pyrene · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22750 · HEXACHLOROBENZENE · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22749 · 2,4,5-TP · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22748 · 2,4-D · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22747 · Heptachlor epoxide · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22746 · Heptachlor · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22745 · LASSO · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22744 · Atrazine · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22743 · Carbofuran · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22742 · Hexachlorocyclopentadiene · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22741 · Dinoseb · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22740 · Picloram · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22739 · Di(2-ethylhexyl) phthalate · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22738 · Simazine · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22737 · OXAMYL · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22736 · Di(2-ethylhexyl) adipate · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22735 · Glyphosate · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22734 · Endothall · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22733 · Diquat · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22732 · Dalapon · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22731 · Toxaphene · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22730 · Methoxychlor · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22729 · BHC-GAMMA · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22728 · Endrin · Synthetic Organic Chemicals
Noncompliance period start January 1, 2023 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22726 · Radium-228 · Radionuclides and Revised Rad Rule
Noncompliance period start January 1, 2020 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22725 · Radium-226 · Radionuclides and Revised Rad Rule
Noncompliance period start January 1, 2020 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22724 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule
Noncompliance period start January 1, 2020 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22723 · Combined Uranium · Radionuclides and Revised Rad Rule
Noncompliance period start January 1, 2020 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.
Monitoring or reporting · Archived
Monitoring, RegularViolation 22722 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule
Noncompliance period start January 1, 2020 · period end December 31, 2025 · first reported June 29, 2026 · EPA return-to-compliance field December 31, 2025
No linked action row appears in the records shown.

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3241	April 22, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3241	April 22, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3231	August 14, 2024	Informal	State Violation/Reminder Notice
3238	April 1, 2026	Resolving	State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
3230	June 29, 2023	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