NJ1103001 · New Jersey

AQUA NJ - HAMILTON SQUARE

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

Violation records shown: 16
EPA health-based flag: 0
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 16

Counties listed by EPA · Mercer County, New Jersey

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

Violations and what followed

Among 7 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 · Archived

Water Quality Parameter M/RViolation 10247 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start July 1, 2024 · period end December 31, 2024 · first reported June 30, 2025 · EPA return-to-compliance field December 31, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1688	April 15, 2025	Informal	State Formal Notice of Violation issued
1689	April 15, 2025	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 10245 · Radium-228 · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported June 11, 2024 · EPA return-to-compliance field March 31, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1683	April 11, 2024	Informal	State Formal Notice of Violation issued
1684	April 11, 2024	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 10244 · Radium-226 · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported June 11, 2024 · EPA return-to-compliance field March 31, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1683	April 11, 2024	Informal	State Formal Notice of Violation issued
1684	April 11, 2024	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 10243 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported June 11, 2024 · EPA return-to-compliance field March 31, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1683	April 11, 2024	Informal	State Formal Notice of Violation issued
1684	April 11, 2024	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 10242 · Combined Uranium · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported June 11, 2024 · EPA return-to-compliance field March 31, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1683	April 11, 2024	Informal	State Formal Notice of Violation issued
1684	April 11, 2024	Informal	State Public Notification requested

Monitoring or reporting · Archived

Monitoring, RegularViolation 10241 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported June 11, 2024 · EPA return-to-compliance field March 31, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1683	April 11, 2024	Informal	State Formal Notice of Violation issued
1684	April 11, 2024	Informal	State Public Notification requested

Monitoring or reporting · Unaddressed by formal action
Lead Consumer NoticeViolation 10236 · Lead and Copper Rule · Lead and Copper Rule
Noncompliance period start December 30, 2023 · first reported June 11, 2024

1 linked action

Enforcement and resolution records linked by EPA
Action ID Date Category EPA action type
1677 March 8, 2024 Informal State Formal Notice of Violation issued

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1677	March 8, 2024	Informal	State Formal Notice of Violation issued

Monitoring or reporting · Unaddressed by formal action

Monitoring, Source Water (GWR)Violation 10234 · E. COLI · Ground Water Rule

Noncompliance period start October 3, 2023 · first reported February 23, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1672	January 23, 2024	Informal	State Formal Notice of Violation issued
1673	January 23, 2024	Informal	State Public Notification requested

Monitoring or reporting · Archived

Water Quality Parameter M/RViolation 10246 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start July 1, 2023 · period end December 31, 2023 · first reported June 11, 2024 · EPA return-to-compliance field December 31, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1685	May 1, 2024	Informal	State Formal Notice of Violation issued
1686	May 1, 2024	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 10233 · Radium-228 · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported February 23, 2024 · EPA return-to-compliance field September 30, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1674	October 23, 2023	Resolving	State Compliance achieved
1670	December 11, 2023	Informal	State Formal Notice of Violation issued
1671	December 11, 2023	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 10232 · Radium-226 · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported February 23, 2024 · EPA return-to-compliance field September 30, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1674	October 23, 2023	Resolving	State Compliance achieved
1670	December 11, 2023	Informal	State Formal Notice of Violation issued
1671	December 11, 2023	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 10231 · Combined Radium (-226 and -228) · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported February 23, 2024 · EPA return-to-compliance field September 30, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1674	October 23, 2023	Resolving	State Compliance achieved
1670	December 11, 2023	Informal	State Formal Notice of Violation issued
1671	December 11, 2023	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 10230 · Combined Uranium · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported February 23, 2024 · EPA return-to-compliance field September 30, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1674	October 23, 2023	Resolving	State Compliance achieved
1670	December 11, 2023	Informal	State Formal Notice of Violation issued
1671	December 11, 2023	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 10229 · Gross Alpha, Excl. Radon and U · Radionuclides and Revised Rad Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported February 23, 2024 · EPA return-to-compliance field September 30, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1674	October 23, 2023	Resolving	State Compliance achieved
1670	December 11, 2023	Informal	State Formal Notice of Violation issued
1671	December 11, 2023	Informal	State Public Notification requested

Monitoring or reporting · Resolved

Monitoring, RegularViolation 10235 · Nitrate · Nitrate Rule

Noncompliance period start January 1, 2023 · period end December 31, 2023 · first reported February 23, 2024 · EPA return-to-compliance field December 31, 2023

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1675	February 16, 2024	Informal	State Formal Notice of Violation issued
1676	February 16, 2024	Informal	State Public Notification requested
1687	May 14, 2024	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Water Quality Parameter M/RViolation 10183 · Lead and Copper Rule · Lead and Copper Rule

Noncompliance period start July 1, 2021 · period end December 31, 2021 · first reported February 25, 2022 · EPA return-to-compliance field December 31, 2021

3 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1655	January 10, 2022	Resolving	State Compliance achieved
1653	February 10, 2022	Informal	State Formal Notice of Violation issued
1654	February 10, 2022	Informal	State Public Notification requested

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