MO2010514 · Missouri
MENDON PWS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 7
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 7
Counties listed by EPA · Chariton 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 6 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.
Monitoring or reporting · Unaddressed by formal action
Notification, Known or Potential LSLViolation 524 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule RevisionsNoncompliance period start July 2, 2025 · first reported June 16, 2026
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 541 April 6, 2026 Informal State Violation/Reminder Notice 542 April 6, 2026 Informal State Public Notification requested Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 523 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2024 · period end March 31, 2024 · first reported June 11, 2024 · EPA return-to-compliance field March 31, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 537 May 9, 2024 Informal State Violation/Reminder Notice 538 May 9, 2024 Informal State Public Notification requested 540 May 13, 2024 Resolving State Compliance achieved 539 June 21, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 522 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start January 1, 2024 · period end March 31, 2024 · first reported June 11, 2024 · EPA return-to-compliance field March 31, 2024
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 537 May 9, 2024 Informal State Violation/Reminder Notice 538 May 9, 2024 Informal State Public Notification requested 540 May 13, 2024 Resolving State Compliance achieved 539 June 21, 2024 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring, Routine (RTCR)Violation 521 · Revised Total Coliform Rule · Revised Total Coliform RuleNoncompliance period start September 1, 2021 · period end September 30, 2021 · first reported March 28, 2022 · EPA return-to-compliance field September 30, 2021
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 535 October 4, 2021 Resolving State Compliance achieved 533 November 3, 2021 Informal State Violation/Reminder Notice 534 November 3, 2021 Informal State Public Notification requested 536 November 18, 2021 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 520 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2020 · period end June 30, 2020 · first reported March 28, 2022 · EPA return-to-compliance field June 30, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 530 August 14, 2020 Resolving State Compliance achieved 526 September 10, 2020 Informal State Violation/Reminder Notice 527 September 10, 2020 Informal State Public Notification requested 528 October 2, 2020 Informal State Public Notification received Monitoring or reporting · Resolved
Monitoring and Reporting (DBP)Violation 519 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts RuleNoncompliance period start April 1, 2020 · period end June 30, 2020 · first reported March 28, 2022 · EPA return-to-compliance field June 30, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 530 August 14, 2020 Resolving State Compliance achieved 526 September 10, 2020 Informal State Violation/Reminder Notice 527 September 10, 2020 Informal State Public Notification requested 528 October 2, 2020 Informal State Public Notification received Monitoring or reporting · Resolved
Follow-up Or Routine LCR Tap M/RViolation 518 · Lead and Copper Rule · Lead and Copper RuleNoncompliance period start October 1, 2019 · period end September 24, 2020 · first reported March 28, 2022 · EPA return-to-compliance field September 24, 2020
4 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 523 November 8, 2019 Informal State Violation/Reminder Notice 524 November 8, 2019 Informal State Public Notification requested 525 December 9, 2019 Informal State Public Notification received 531 September 24, 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