MO3010155 · Missouri
CHAMOIS PWS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 8
- EPA health-based flag
- 2
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 5
Counties listed by EPA · Osage 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 8 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 338 days. The interval uses the reporting periods and dates on file.
Monitoring or reporting · Resolved
Notification, Known or Potential LSLViolation 1236445 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start July 2, 2025 · period end March 24, 2026 · first reported June 16, 2026 · EPA return-to-compliance field March 24, 2026
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 844 March 24, 2026 Resolving State Compliance achieved 842 April 6, 2026 Informal State Violation/Reminder Notice 843 April 6, 2026 Informal State Public Notification requested 845 April 7, 2026 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 1236421 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start September 1, 2023 · period end September 30, 2023 · first reported November 14, 2023 · EPA return-to-compliance field September 30, 2023
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 817 September 8, 2020 Formal State Administrative/Compliance Order without penalty issued 827 October 26, 2023 Informal State Violation/Reminder Notice 828 October 26, 2023 Informal State Public Notification requested 830 November 6, 2023 Informal State Public Notification received 832 November 21, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 1236419 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start April 1, 2023 · period end April 30, 2023 · first reported September 15, 2023 · EPA return-to-compliance field April 30, 2023
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 817 September 8, 2020 Formal State Administrative/Compliance Order without penalty issued 824 May 30, 2023 Informal State Violation/Reminder Notice 825 May 30, 2023 Informal State Public Notification requested 829 May 30, 2023 Resolving State Compliance achieved 837 January 24, 2024 Informal State Public Notification received EPA health-based flag · Resolved
Treatment Technique No Certif. OperatorViolation 1236418 · Stage 1 Disinfectants and Disinfection Byproducts Rule · Stage 1 Disinfectants and Disinfection Byproducts RuleNoncompliance period start November 23, 2022 · period end January 8, 2024 · first reported March 27, 2023 · EPA return-to-compliance field January 8, 2024
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 817 September 8, 2020 Formal State Administrative/Compliance Order without penalty issued 821 November 23, 2022 Informal State Public Notification requested 822 November 23, 2022 Informal State Formal Notice of Violation issued 823 January 3, 2023 Informal State Public Notification received 836 January 8, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 1236423 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2021 · period end December 31, 2023 · first reported December 26, 2023 · EPA return-to-compliance field December 31, 2023
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 817 September 8, 2020 Formal State Administrative/Compliance Order without penalty issued 833 December 19, 2023 Informal State Violation/Reminder Notice 834 December 19, 2023 Informal State Public Notification requested 838 January 24, 2024 Informal State Public Notification received 840 August 12, 2024 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 1236422 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2021 · period end December 31, 2023 · first reported December 26, 2023 · EPA return-to-compliance field December 31, 2023
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 817 September 8, 2020 Formal State Administrative/Compliance Order without penalty issued 833 December 19, 2023 Informal State Violation/Reminder Notice 834 December 19, 2023 Informal State Public Notification requested 838 January 24, 2024 Informal State Public Notification received 840 August 12, 2024 Resolving State Compliance achieved EPA health-based flag · Resolved
Failure To Address DeficiencyViolation 1236417 · Groundwater Rule · Ground Water RuleNoncompliance period start July 2, 2020 · period end September 19, 2024 · first reported September 22, 2022 · EPA return-to-compliance field September 19, 2024
5 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 817 September 8, 2020 Formal State Administrative/Compliance Order without penalty issued 818 June 14, 2022 Informal State Formal Notice of Violation issued 819 June 14, 2022 Informal State Public Notification requested 839 January 24, 2024 Informal State Public Notification received 841 September 19, 2024 Resolving State Compliance achieved Other or unclassified · Resolved
Consumer Confidence Report Inadequate ReportingViolation 1236416 · Consumer Confidence Rule · Consumer Confidence RuleNoncompliance period start July 1, 2019 · period end November 25, 2019 · first reported March 28, 2022 · EPA return-to-compliance field November 25, 2019
1 linked action
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 816 November 25, 2019 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