WV3302708 · West Virginia

MASON WATER DEPT

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

Violation records shown: 32
EPA health-based flag: 0
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 19

Counties listed by EPA · Mason County, West Virginia

Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.

Violations and what followed

Among 17 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.

Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 603742 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start May 13, 2026 · first reported August 14, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
5219 June 16, 2026 Informal State Formal Notice of Violation issued
Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 603741 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start November 15, 2025 · first reported February 17, 2026

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
5217 December 12, 2025 Informal State Formal Notice of Violation issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5219	June 16, 2026	Informal	State Formal Notice of Violation issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5217	December 12, 2025	Informal	State Formal Notice of Violation issued

Monitoring or reporting · Archived

Monitoring of Treatment (SWTR-Unfilt/GWR)Violation 603740 · Groundwater Rule · Ground Water Rule

Noncompliance period start October 1, 2025 · period end October 31, 2025 · first reported February 17, 2026 · EPA return-to-compliance field October 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5215	December 12, 2025	Informal	State Formal Notice of Violation issued
5216	December 12, 2025	Informal	State Public Notification requested

Monitoring or reporting · Unaddressed by formal action

Follow-up Or Routine LCR Tap M/RViolation 603738 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start October 1, 2025 · first reported February 17, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5211	November 13, 2025	Informal	State Formal Notice of Violation issued
5212	November 13, 2025	Informal	State Public Notification requested

Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 603737 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start August 14, 2025 · first reported December 3, 2025

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
5210 September 13, 2025 Informal State Formal Notice of Violation issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5210	September 13, 2025	Informal	State Formal Notice of Violation issued

Other or unclassified · Resolved

Consumer Confidence Report Complete Failure to ReportViolation 603736 · Consumer Confidence Rule · Consumer Confidence Rule

Noncompliance period start July 1, 2025 · period end July 24, 2025 · first reported December 3, 2025 · EPA return-to-compliance field July 24, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5209	July 24, 2025	Resolving	State Compliance achieved
5206	August 14, 2025	Informal	State Formal Notice of Violation issued

Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 603733 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start June 15, 2025 · first reported August 20, 2025

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
5198 July 12, 2025 Informal State Formal Notice of Violation issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5198	July 12, 2025	Informal	State Formal Notice of Violation issued

Monitoring or reporting · Archived

Monitoring, RegularViolation 603735 · Nitrate · Nitrate Rule

Noncompliance period start April 1, 2025 · period end June 30, 2025 · first reported August 20, 2025 · EPA return-to-compliance field June 30, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5204	August 14, 2025	Informal	State Formal Notice of Violation issued
5205	August 14, 2025	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 603734 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2025 · period end April 30, 2025 · first reported August 20, 2025 · EPA return-to-compliance field April 30, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5208	July 3, 2025	Resolving	State Compliance achieved
5202	August 13, 2025	Informal	State Formal Notice of Violation issued
5203	August 13, 2025	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 603732 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start March 1, 2025 · period end March 31, 2025 · first reported June 3, 2025 · EPA return-to-compliance field March 31, 2025

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5194	May 13, 2025	Informal	State Formal Notice of Violation issued
5195	May 13, 2025	Informal	State Public Notification requested
5201	July 3, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 603730 · Nitrate · Nitrate Rule

Noncompliance period start July 1, 2024 · period end September 30, 2024 · first reported November 19, 2024 · EPA return-to-compliance field September 30, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5192	November 15, 2024	Informal	State Formal Notice of Violation issued
5193	November 15, 2024	Informal	State Public Notification requested
5200	January 3, 2025	Resolving	State Compliance achieved

Other or unclassified · Unaddressed by formal action
Consumer Confidence Report Complete Failure to ReportViolation 603729 · Consumer Confidence Rule · Consumer Confidence Rule
Noncompliance period start July 1, 2024 · first reported November 19, 2024

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
5188 August 14, 2024 Informal State Formal Notice of Violation issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5188	August 14, 2024	Informal	State Formal Notice of Violation issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 603728 · Nitrate · Nitrate Rule

Noncompliance period start April 1, 2024 · period end June 30, 2024 · first reported August 16, 2024 · EPA return-to-compliance field June 30, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5190	August 14, 2024	Informal	State Formal Notice of Violation issued
5191	August 14, 2024	Informal	State Public Notification requested
5200	January 3, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 603726 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2024 · period end April 30, 2024 · first reported August 16, 2024 · EPA return-to-compliance field April 30, 2024

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5186	June 15, 2024	Informal	State Formal Notice of Violation issued
5187	June 15, 2024	Informal	State Public Notification requested
5208	July 3, 2025	Resolving	State Compliance achieved

Other or unclassified · Resolved

Public Notification Violation for NPDWR ViolationViolation 603725 · Public Notice · Public Notice Rule and Revised PN Rule

Noncompliance period start August 13, 2023 · period end December 6, 2023 · first reported November 20, 2023 · EPA return-to-compliance field December 6, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5171	September 15, 2023	Informal	State Formal Notice of Violation issued
5177	December 6, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 603724 · Nitrate · Nitrate Rule

Noncompliance period start April 1, 2023 · period end June 30, 2023 · first reported August 29, 2023 · EPA return-to-compliance field June 30, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5169	August 15, 2023	Informal	State Formal Notice of Violation issued
5170	August 15, 2023	Informal	State Public Notification requested
5172	October 10, 2023	Resolving	State Compliance achieved
5176	December 21, 2023	Informal	State Public Notification received

Other or unclassified · Resolved

Public Notification Violation for NPDWR ViolationViolation 603723 · Public Notice · Public Notice Rule and Revised PN Rule

Noncompliance period start March 16, 2023 · period end December 6, 2023 · first reported May 22, 2023 · EPA return-to-compliance field December 6, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5168	April 13, 2023	Informal	State Formal Notice of Violation issued
5180	December 6, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Unaddressed by formal action

Follow-up Or Routine LCR Tap M/RViolation 603722 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start January 1, 2023 · first reported May 22, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5166	February 16, 2023	Informal	State Formal Notice of Violation issued
5167	February 16, 2023	Informal	State Public Notification requested
5182	December 21, 2023	Informal	State Public Notification received

Monitoring or reporting · Unaddressed by formal action
Lead Consumer NoticeViolation 603720 · Lead and Copper Rule · Lead and Copper Rule
Noncompliance period start September 29, 2022 · first reported November 17, 2022

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
5163 November 16, 2022 Informal State Formal Notice of Violation issued
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 603718 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start May 15, 2022 · period end March 21, 2022 · first reported September 26, 2022 · EPA return-to-compliance field March 21, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
5155 March 21, 2022 Resolving State Compliance achieved
5153 June 16, 2022 Informal State Formal Notice of Violation issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5163	November 16, 2022	Informal	State Formal Notice of Violation issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5155	March 21, 2022	Resolving	State Compliance achieved
5153	June 16, 2022	Informal	State Formal Notice of Violation issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 603719 · Nitrate · Nitrate Rule

Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported September 26, 2022 · EPA return-to-compliance field June 30, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5161	August 13, 2022	Informal	State Formal Notice of Violation issued
5162	August 13, 2022	Informal	State Public Notification requested
5172	October 10, 2023	Resolving	State Compliance achieved
5178	December 21, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 603717 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start January 1, 2022 · period end March 31, 2022 · first reported May 17, 2022 · EPA return-to-compliance field March 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5149	March 16, 2022	Informal	State Formal Notice of Violation issued
5150	March 16, 2022	Informal	State Public Notification requested
5173	April 1, 2022	Resolving	State Compliance achieved
5160	July 18, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 603716 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start January 1, 2022 · period end January 31, 2022 · first reported May 17, 2022 · EPA return-to-compliance field January 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5151	March 16, 2022	Informal	State Formal Notice of Violation issued
5152	March 16, 2022	Informal	State Public Notification requested
5173	April 1, 2022	Resolving	State Compliance achieved
5181	December 21, 2023	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 603714 · Nitrate · Nitrate Rule

Noncompliance period start October 1, 2021 · period end December 31, 2021 · first reported February 16, 2022 · EPA return-to-compliance field December 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5147	February 16, 2022	Informal	State Formal Notice of Violation issued
5148	February 16, 2022	Informal	State Public Notification requested
5154	March 21, 2022	Informal	State Public Notification received
5172	October 10, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring of Treatment (SWTR-Unfilt/GWR)Violation 603710 · Groundwater Rule · Ground Water Rule

Noncompliance period start September 1, 2021 · period end September 30, 2021 · first reported November 16, 2021 · 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
5175	November 10, 2021	Resolving	State Compliance achieved
5134	November 15, 2021	Informal	State Formal Notice of Violation issued
5135	November 15, 2021	Informal	State Public Notification requested
5157	March 21, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 603708 · Nitrate · Nitrate Rule

Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported May 18, 2021 · EPA return-to-compliance field March 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5132	May 15, 2021	Informal	State Formal Notice of Violation issued
5133	May 15, 2021	Informal	State Public Notification requested
5156	March 21, 2022	Informal	State Public Notification received
5172	October 10, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 603712 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start September 1, 2020 · period end August 31, 2021 · first reported December 20, 2021 · EPA return-to-compliance field August 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5140	November 19, 2021	Informal	State Formal Notice of Violation issued
5141	November 19, 2021	Informal	State Public Notification requested
5158	March 21, 2022	Informal	State Public Notification received
5174	July 18, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 603711 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start September 1, 2020 · period end August 31, 2021 · first reported December 20, 2021 · EPA return-to-compliance field August 31, 2021

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
5138	November 19, 2021	Informal	State Formal Notice of Violation issued
5139	November 19, 2021	Informal	State Public Notification requested
5159	March 21, 2022	Informal	State Public Notification received
5174	July 18, 2022	Resolving	State Compliance achieved

Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 603638 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 30, 2011 · first reported May 24, 2011
No linked action row appears in the records shown.
Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 603637 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 30, 2011 · first reported May 24, 2011
No linked action row appears in the records shown.
Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 603636 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 29, 2011 · first reported May 24, 2011
No linked action row appears in the records shown.
Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 603635 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start January 29, 2011 · first reported May 24, 2011
No linked action row appears in the records shown.

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