MS0140010 · Mississippi

TOWN OF LYON

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

Violation records shown: 23
EPA health-based flag: 1
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 19

Counties listed by EPA · Coahoma County, Mississippi

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

Violations and what followed

Among 22 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.

Monitoring or reporting · Resolved

Monitoring, Routine (RTCR)Violation 3037 · Revised Total Coliform Rule · Revised Total Coliform Rule

Noncompliance period start March 1, 2026 · period end March 31, 2026 · first reported August 14, 2026 · EPA return-to-compliance field March 31, 2026

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4219	April 15, 2026	Informal	State Formal Notice of Violation issued
4220	April 15, 2026	Informal	State Public Notification requested
4226	April 28, 2026	Informal	State Public Notification received
4221	April 29, 2026	Resolving	State Compliance achieved

Monitoring or reporting · Archived

Monitoring and Reporting (DBP)Violation 3036 · Chlorine · Stage 1 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start January 1, 2026 · period end March 31, 2026 · first reported August 14, 2026 · EPA return-to-compliance field March 31, 2026

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4222	April 24, 2026	Informal	State Formal Notice of Violation issued
4223	April 24, 2026	Informal	State Public Notification requested

Monitoring or reporting · Resolved
LSL ReportingViolation 3035 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions
Noncompliance period start October 17, 2024 · period end February 5, 2025 · first reported March 27, 2025 · EPA return-to-compliance field February 5, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
4212 February 5, 2025 Resolving State Compliance achieved
4211 February 26, 2025 Informal State Violation/Reminder Notice
EPA health-based flag · Resolved
LSL InventoryViolation 3034 · LEAD AND COPPER RULE REVISIONS · Lead and Copper Rule Revisions
Noncompliance period start October 17, 2024 · period end February 5, 2025 · first reported March 27, 2025 · EPA return-to-compliance field February 5, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
4212 February 5, 2025 Resolving State Compliance achieved
4210 February 26, 2025 Informal State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4212	February 5, 2025	Resolving	State Compliance achieved
4211	February 26, 2025	Informal	State Violation/Reminder Notice

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4212	February 5, 2025	Resolving	State Compliance achieved
4210	February 26, 2025	Informal	State Violation/Reminder Notice

Other or unclassified · Resolved

Consumer Confidence Report Inadequate ReportingViolation 3029 · Consumer Confidence Rule · Consumer Confidence Rule

Noncompliance period start October 1, 2024 · period end January 22, 2025 · first reported February 14, 2025 · EPA return-to-compliance field January 22, 2025

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4200	October 8, 2024	Informal	State Formal Notice of Violation issued
4201	October 8, 2024	Informal	State Public Notification requested
4202	January 22, 2025	Resolving	State Compliance achieved
4203	January 22, 2025	Informal	State no additional Formal Action needed

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3028 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2024 · period end June 30, 2024 · first reported August 15, 2024 · EPA return-to-compliance field June 30, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4196	July 19, 2024	Informal	State Formal Notice of Violation issued
4197	July 19, 2024	Informal	State Public Notification requested
4213	September 18, 2024	Resolving	State Compliance achieved
4218	June 30, 2025	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3027 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2024 · period end June 30, 2024 · first reported August 15, 2024 · EPA return-to-compliance field June 30, 2024

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4196	July 19, 2024	Informal	State Formal Notice of Violation issued
4197	July 19, 2024	Informal	State Public Notification requested
4213	September 18, 2024	Resolving	State Compliance achieved
4218	June 30, 2025	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 3032 · Nitrite · Nitrate Rule

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported February 14, 2025 · EPA return-to-compliance field December 31, 2024

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4207	January 6, 2025	Informal	State Formal Notice of Violation issued
4208	January 6, 2025	Informal	State Public Notification requested
4217	February 4, 2025	Informal	State Public Notification received
4214	March 12, 2025	Resolving	State Compliance achieved
4215	April 30, 2025	Informal	State Formal Notice of Violation issued
4216	April 30, 2025	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 3031 · Nitrate · Nitrate Rule

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported February 14, 2025 · EPA return-to-compliance field December 31, 2024

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4207	January 6, 2025	Informal	State Formal Notice of Violation issued
4208	January 6, 2025	Informal	State Public Notification requested
4217	February 4, 2025	Informal	State Public Notification received
4214	March 12, 2025	Resolving	State Compliance achieved
4215	April 30, 2025	Informal	State Formal Notice of Violation issued
4216	April 30, 2025	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 3030 · Nitrate-Nitrite · Nitrate Rule

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported February 14, 2025 · EPA return-to-compliance field December 31, 2024

6 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4207	January 6, 2025	Informal	State Formal Notice of Violation issued
4208	January 6, 2025	Informal	State Public Notification requested
4217	February 4, 2025	Informal	State Public Notification received
4214	March 12, 2025	Resolving	State Compliance achieved
4215	April 30, 2025	Informal	State Formal Notice of Violation issued
4216	April 30, 2025	Informal	State Public Notification requested

Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 3033 · Public Notice · Public Notice Rule and Revised PN Rule
Noncompliance period start October 1, 2023 · period end November 4, 2023 · first reported February 14, 2025 · EPA return-to-compliance field November 4, 2023

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
4204 November 4, 2023 Resolving State Compliance achieved

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4204	November 4, 2023	Resolving	State Compliance achieved

Other or unclassified · Resolved

Consumer Confidence Report Complete Failure to ReportViolation 3024 · Consumer Confidence Rule · Consumer Confidence Rule

Noncompliance period start July 1, 2023 · period end September 13, 2023 · first reported November 14, 2023 · EPA return-to-compliance field September 13, 2023

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4195	September 13, 2023	Resolving	State Compliance achieved
4198	October 4, 2023	Informal	State Formal Notice of Violation issued
4199	October 4, 2023	Informal	State Public Notification requested
4209	January 27, 2025	Informal	State no additional Formal Action needed

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3023 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2023 · period end June 30, 2023 · first reported November 14, 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
4191	September 20, 2023	Informal	State Formal Notice of Violation issued
4192	September 20, 2023	Informal	State Public Notification requested
4193	November 4, 2023	Informal	State Public Notification received
4194	September 24, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3022 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2023 · period end June 30, 2023 · first reported November 14, 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
4191	September 20, 2023	Informal	State Formal Notice of Violation issued
4192	September 20, 2023	Informal	State Public Notification requested
4193	November 4, 2023	Informal	State Public Notification received
4194	September 24, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3010 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start July 1, 2021 · period end September 30, 2021 · first reported December 29, 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
4178	November 19, 2021	Informal	State Formal Notice of Violation issued
4179	November 19, 2021	Informal	State Public Notification requested
4181	December 31, 2021	Resolving	State Compliance achieved
4180	June 30, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3009 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start July 1, 2021 · period end September 30, 2021 · first reported December 29, 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
4178	November 19, 2021	Informal	State Formal Notice of Violation issued
4179	November 19, 2021	Informal	State Public Notification requested
4181	December 31, 2021	Resolving	State Compliance achieved
4180	June 30, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 3013 · Nitrite · Nitrate Rule

Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported January 3, 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
4174	December 28, 2021	Informal	State Formal Notice of Violation issued
4175	December 28, 2021	Informal	State Public Notification requested
4177	January 31, 2022	Resolving	State Compliance achieved
4176	June 30, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 3012 · Nitrate · Nitrate Rule

Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported January 3, 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
4174	December 28, 2021	Informal	State Formal Notice of Violation issued
4175	December 28, 2021	Informal	State Public Notification requested
4177	January 31, 2022	Resolving	State Compliance achieved
4176	June 30, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring, RegularViolation 3011 · Nitrate-Nitrite · Nitrate Rule

Noncompliance period start January 1, 2021 · period end December 31, 2021 · first reported January 3, 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
4174	December 28, 2021	Informal	State Formal Notice of Violation issued
4175	December 28, 2021	Informal	State Public Notification requested
4177	January 31, 2022	Resolving	State Compliance achieved
4176	June 30, 2022	Informal	State Public Notification received

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3005 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported May 14, 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
4166	May 3, 2021	Informal	State Formal Notice of Violation issued
4167	May 3, 2021	Informal	State Public Notification requested
4188	June 30, 2022	Informal	State Public Notification received
4189	June 30, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3004 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported May 14, 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
4166	May 3, 2021	Informal	State Formal Notice of Violation issued
4167	May 3, 2021	Informal	State Public Notification requested
4188	June 30, 2022	Informal	State Public Notification received
4189	June 30, 2022	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3007 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2020 · period end December 31, 2020 · first reported August 17, 2021 · EPA return-to-compliance field December 31, 2020

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4168	May 24, 2021	Informal	State Formal Notice of Violation issued
4169	May 24, 2021	Informal	State Public Notification requested
4184	June 30, 2021	Informal	State Public Notification received
4185	June 30, 2021	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring and Reporting (DBP)Violation 3006 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2020 · period end December 31, 2020 · first reported August 17, 2021 · EPA return-to-compliance field December 31, 2020

4 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
4168	May 24, 2021	Informal	State Formal Notice of Violation issued
4169	May 24, 2021	Informal	State Public Notification requested
4184	June 30, 2021	Informal	State Public Notification received
4185	June 30, 2021	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