TX1600001 · Texas

CITY OF MASON

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

Violation records shown: 20
EPA health-based flag: 14
Health-based records unresolved in this snapshot: 1
Monitoring and reporting records: 4

Counties listed by EPA · Mason County, Texas

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

EPA health-based flag · Unaddressed by formal action

Treatment Technique, Level 1 Assessment (RTCR)Violation 90067810 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start April 11, 2026 · first reported June 26, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90116012	May 19, 2026	Informal	State Violation/Reminder Notice
90116013	May 19, 2026	Informal	State Public Notification requested

Other or unclassified · Unaddressed by formal action
Public Notification Violation for NPDWR ViolationViolation 90067815 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start June 19, 2026 · first reported September 22, 2026
No linked action row appears in the records shown.

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 90067809 · E. COLI · Ground Water Rule

Noncompliance period start February 12, 2026 · period end June 2, 2026 · first reported June 26, 2026 · EPA return-to-compliance field June 2, 2026

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90116009	April 23, 2026	Informal	State Violation/Reminder Notice
90116010	April 23, 2026	Informal	State Public Notification requested
90116014	June 2, 2026	Resolving	State Compliance achieved

EPA health-based flag · Archived
Maximum Contaminant Level Violation, AverageViolation 90067819 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule
Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported September 28, 2026 · EPA return-to-compliance field March 31, 2026
No linked action row appears in the records shown.

Monitoring or reporting · Resolved

Lead Consumer NoticeViolation 90067807 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start December 30, 2025 · period end March 30, 2026 · first reported March 31, 2026 · EPA return-to-compliance field March 30, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90116008	February 23, 2026	Informal	State Violation/Reminder Notice
90116015	March 30, 2026	Resolving	State Compliance achieved

Other or unclassified · Resolved

Consumer Confidence Report Inadequate ReportingViolation 90067803 · Consumer Confidence Rule · Consumer Confidence Rule

Noncompliance period start July 1, 2025 · period end January 27, 2026 · first reported March 31, 2026 · EPA return-to-compliance field January 27, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90116007	December 31, 2025	Informal	State Violation/Reminder Notice
90116006	January 27, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, Source Water (GWR)Violation 90067792 · E. COLI · Ground Water Rule

Noncompliance period start November 27, 2024 · period end March 24, 2025 · first reported May 14, 2025 · EPA return-to-compliance field March 24, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115994	March 6, 2025	Informal	State Violation/Reminder Notice
90115995	March 6, 2025	Informal	State Public Notification requested
90116011	March 24, 2025	Resolving	State Compliance achieved
90116003	May 7, 2025	Informal	State Public Notification received

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067779 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start October 1, 2022 · period end December 31, 2022 · first reported February 15, 2023 · EPA return-to-compliance field December 31, 2022

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115975	January 20, 2023	Informal	State Violation/Reminder Notice
90115976	January 20, 2023	Informal	State Public Notification requested
90115982	April 6, 2023	Informal	State Public Notification received
90115983	June 23, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Water Quality Parameter M/RViolation 90067777 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start July 1, 2022 · period end December 31, 2022 · first reported February 15, 2023 · EPA return-to-compliance field December 31, 2022

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115977	January 25, 2023	Informal	State Violation/Reminder Notice
90115978	January 25, 2023	Informal	State Public Notification requested
90115984	June 6, 2023	Resolving	State Compliance achieved
90115988	December 11, 2023	Informal	State Public Notification received

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067776 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported August 15, 2022 · EPA return-to-compliance field June 30, 2022

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115971	August 4, 2022	Informal	State Violation/Reminder Notice
90115972	August 4, 2022	Informal	State Public Notification requested
90115973	August 8, 2022	Informal	State Public Notification received
90115983	June 23, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067775 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

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

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115969	June 14, 2022	Informal	State Violation/Reminder Notice
90115970	June 14, 2022	Informal	State Public Notification requested
90115974	September 8, 2022	Informal	State Public Notification received
90115983	June 23, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067773 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

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

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115966	February 23, 2022	Informal	State Violation/Reminder Notice
90115967	February 23, 2022	Informal	State Public Notification requested
90115968	April 11, 2022	Informal	State Public Notification received
90115981	March 31, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067769 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2021 · period end September 30, 2021 · first reported November 16, 2021 · EPA return-to-compliance field September 30, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115959	October 28, 2021	Informal	State Violation/Reminder Notice
90115960	October 28, 2021	Informal	State Public Notification requested
90115964	December 15, 2021	Informal	State Public Notification received
90115983	June 23, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067767 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2021 · period end September 30, 2021 · first reported November 16, 2021 · EPA return-to-compliance field September 30, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115957	October 28, 2021	Informal	State Violation/Reminder Notice
90115958	October 28, 2021	Informal	State Public Notification requested
90115965	December 15, 2021	Informal	State Public Notification received
90115981	March 31, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067766 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2021 · period end June 30, 2021 · first reported September 29, 2021 · EPA return-to-compliance field June 30, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115952	September 8, 2021	Informal	State Violation/Reminder Notice
90115953	September 8, 2021	Informal	State Public Notification requested
90115963	December 15, 2021	Informal	State Public Notification received
90115983	June 23, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067765 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start April 1, 2021 · period end June 30, 2021 · first reported September 29, 2021 · EPA return-to-compliance field June 30, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115950	September 8, 2021	Informal	State Violation/Reminder Notice
90115951	September 8, 2021	Informal	State Public Notification requested
90115962	December 9, 2021	Informal	State Public Notification received
90115981	March 31, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067759 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported August 23, 2021 · EPA return-to-compliance field March 31, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115944	July 29, 2021	Informal	State Violation/Reminder Notice
90115945	July 29, 2021	Informal	State Public Notification requested
90115961	November 5, 2021	Informal	State Public Notification received
90115983	June 23, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067758 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported August 23, 2021 · EPA return-to-compliance field March 31, 2021

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115942	July 29, 2021	Informal	State Violation/Reminder Notice
90115943	July 29, 2021	Informal	State Public Notification requested
90115956	October 12, 2021	Informal	State Public Notification received
90115981	March 31, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067742 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start October 1, 2020 · period end December 31, 2020 · first reported February 22, 2021 · EPA return-to-compliance field December 31, 2020

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115934	February 9, 2021	Informal	State Violation/Reminder Notice
90115935	February 9, 2021	Informal	State Public Notification requested
90115955	September 17, 2021	Informal	State Public Notification received
90115983	June 23, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 90067741 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start October 1, 2020 · period end December 31, 2020 · first reported February 22, 2021 · EPA return-to-compliance field December 31, 2020

5 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
90115718	August 15, 2014	Formal	State Administrative/Compliance Order without penalty issued
90115932	February 9, 2021	Informal	State Violation/Reminder Notice
90115933	February 9, 2021	Informal	State Public Notification requested
90115948	May 11, 2021	Informal	State Public Notification received
90115981	March 31, 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