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CA3310025 · California

NORCO, CITY OF

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

Violation records shown: 43
EPA health-based flag: 1
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 42

Counties listed by EPA · Riverside County, California

Open the EPA system record

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

Violations and what followed

Among 43 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.

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 9620064 · TTHM · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start July 1, 2025 · period end September 30, 2025 · first reported March 20, 2026 · EPA return-to-compliance field September 30, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
9720031	October 7, 2025	Formal	State Administrative/Compliance Order without penalty issued
9720032	December 9, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620060 · Chlordane · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620059 · ETHYLENE DIBROMIDE · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620058 · 1,2-DIBROMO-3-CHLOROPROPANE · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620057 · Total Polychlorinated Biphenyls (PCB) · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620056 · Pentachlorophenol · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620055 · Benzo(a)pyrene · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620054 · HEXACHLOROBENZENE · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620053 · 2,4,5-TP · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620052 · 2,4-D · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620051 · Heptachlor epoxide · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620050 · Heptachlor · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620049 · 2,3,7,8-TCDD · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620048 · LASSO · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620047 · Atrazine · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620046 · Carbofuran · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620045 · Hexachlorocyclopentadiene · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620044 · Dinoseb · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620043 · Picloram · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620042 · Di(2-ethylhexyl) phthalate · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620041 · Simazine · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620040 · OXAMYL · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620039 · Di(2-ethylhexyl) adipate · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620038 · Glyphosate · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620037 · Endothall · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620036 · Diquat · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620035 · Dalapon · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620034 · Toxaphene · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620033 · Methoxychlor · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620032 · BHC-GAMMA · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620031 · Endrin · Synthetic Organic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620029 · Selenium · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620028 · Thallium, Total · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620027 · Beryllium, Total · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620026 · Antimony, Total · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620025 · Nitrite · Nitrate Rule

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620024 · Nickel · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620023 · Mercury · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620022 · Fluoride · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620021 · Chromium · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620020 · Cadmium · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620019 · Barium · Inorganic Chemicals

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

Monitoring or reporting · Resolved

Monitoring, RegularViolation 9620018 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2024 · period end December 31, 2024 · first reported September 19, 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
9720030	August 7, 2025	Resolving	State Compliance achieved
9720029	September 2, 2025	Formal	State Administrative/Compliance Order without penalty issued

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