PA5100049 · Pennsylvania
MARS BOROUGH WATER WORKS
Federal fiscal 2026Q3 · EPA violation and follow-up records
- Violation records shown
- 27
- EPA health-based flag
- 0
- Health-based records unresolved in this snapshot
- 0
- Monitoring and reporting records
- 26
Counties listed by EPA · Butler County, Pennsylvania
Find the utility’s annual water quality report. For current advisories, check the utility or local drinking-water authority.
Violations and what followed
Among 27 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 365 days. The interval uses the reporting periods and dates on file.
Other or unclassified · Resolved
Public Notification Violation for NPDWR ViolationViolation 2527316 · Public Notice · Public Notice Rule and Revised PN RuleNoncompliance period start July 11, 2025 · period end September 23, 2025 · first reported March 9, 2026 · EPA return-to-compliance field September 23, 2025
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 25273161005 September 23, 2025 Informal State Public Notification requested 25273162005 September 23, 2025 Resolving State Compliance achieved 25273165 September 23, 2025 Informal State Violation/Reminder Notice Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)Violation 2424390 · Groundwater Rule · Ground Water RuleNoncompliance period start June 1, 2024 · period end June 30, 2024 · first reported August 16, 2024 · EPA return-to-compliance field June 30, 2024
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 242439084003 August 13, 2024 Informal State Formal Notice of Violation issued 252439086003 March 14, 2025 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)Violation 2323396 · Groundwater Rule · Ground Water RuleNoncompliance period start March 1, 2023 · period end March 31, 2023 · first reported June 15, 2023 · EPA return-to-compliance field March 31, 2023
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 232339678004 May 30, 2023 Informal State Violation/Reminder Notice 232339680004 May 30, 2023 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2209205 · Radium-228 · Radionuclides and Revised Rad RuleNoncompliance period start October 1, 2021 · period end December 31, 2021 · first reported February 12, 2026 · EPA return-to-compliance field December 31, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 220920372001 February 9, 2022 Informal State Violation/Reminder Notice 220920375001 February 17, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2209204 · Radium-226 · Radionuclides and Revised Rad RuleNoncompliance period start October 1, 2021 · period end December 31, 2021 · first reported February 12, 2026 · EPA return-to-compliance field December 31, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 220920372001 February 9, 2022 Informal State Violation/Reminder Notice 220920375001 February 17, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2209203 · Combined Uranium · Radionuclides and Revised Rad RuleNoncompliance period start October 1, 2021 · period end December 31, 2021 · first reported February 12, 2026 · EPA return-to-compliance field December 31, 2021
2 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 220920372001 February 9, 2022 Informal State Violation/Reminder Notice 220920375001 February 17, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring of Treatment (SWTR-Unfilt/GWR)Violation 2107281 · Groundwater Rule · Ground Water RuleNoncompliance period start December 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
3 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 220728168001 March 10, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110132 · Styrene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110131 · Ethylbenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110130 · Toluene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110129 · Benzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110128 · CHLOROBENZENE · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110127 · Tetrachloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110126 · 1,1,2-Trichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110125 · Trichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110124 · 1,2-Dichloropropane · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110123 · Carbon tetrachloride · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110122 · 1,1,1-Trichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110121 · 1,2-Dichloroethane · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110120 · trans-1,2-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110119 · 1,1-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110118 · p-Dichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110117 · o-Dichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110116 · DICHLOROMETHANE · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110115 · Xylenes, Total · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110114 · cis-1,2-Dichloroethylene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 Resolving State Compliance achieved Monitoring or reporting · Resolved
Monitoring, RegularViolation 2110113 · 1,2,4-Trichlorobenzene · Volatile Organic ChemicalsNoncompliance period start January 1, 2020 · period end December 31, 2020 · first reported March 4, 2021 · EPA return-to-compliance field December 31, 2020
6 linked actions
Enforcement and resolution records linked by EPA Action ID Date Category EPA action type 210728166001 February 12, 2021 Informal State Violation/Reminder Notice 210728166002 February 12, 2021 Informal State Violation/Reminder Notice 211011367002 February 12, 2021 Informal State Public Notification requested 211011367003 February 12, 2021 Informal State Public Notification requested 221011368002 January 14, 2022 Informal State Public Notification received 221011369002 January 14, 2022 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