MO4010788 · Missouri
THAYER PWS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 5
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 1
Counties listed by EPA · Oregon County, Missouri
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 139 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Notification, Known or Potential LSLViolation 9130917 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start July 2, 2025 · period end June 24, 2025 · first reported June 16, 2026 · EPA return-to-compliance field June 24, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 418229 June 24, 2025 Resolving State Compliance achieved 418227 April 6, 2026 Informal State Violation/Reminder Notice 418228 April 6, 2026 Informal State Public Notification requested Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 9130915 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2025 · period end November 25, 2025 · first reported December 31, 2025 · EPA return-to-compliance field November 25, 2025
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 418223 November 25, 2025 Informal State Formal Notice of Violation issued 418224 November 25, 2025 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 9130913 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2023 · period end November 1, 2023 · first reported November 14, 2023 · EPA return-to-compliance field November 1, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 418220 October 31, 2023 Informal State Formal Notice of Violation issued 418221 November 1, 2023 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Complete Failure to ReportViolation 9130912 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2022 · period end November 30, 2022 · first reported December 9, 2022 · 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 418219 November 30, 2022 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 9130911 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2020 · period end November 9, 2020 · first reported March 28, 2022 · EPA return-to-compliance field November 9, 2020
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 418217 November 9, 2020 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