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CA4110012 · California

CUESTA LA HONDA GUILD INC

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

Violation records shown: 34
EPA health-based flag: 4
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 30

Counties listed by EPA · San Mateo 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 34 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 1,095 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 1117013 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start October 1, 2021 · period end December 31, 2021 · first reported February 16, 2022 · 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
1117015	April 19, 2021	Formal	State Administrative/Compliance Order without penalty issued
1117019	April 4, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 1117012 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start July 1, 2021 · period end September 30, 2021 · first reported February 16, 2022 · EPA return-to-compliance field September 30, 2021

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1117015	April 19, 2021	Formal	State Administrative/Compliance Order without penalty issued
1117019	April 4, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 1117011 · Total Haloacetic Acids (HAA5) · Stage 2 Disinfectants and Disinfection Byproducts Rule

Noncompliance period start April 1, 2021 · period end June 30, 2021 · first reported August 12, 2021 · EPA return-to-compliance field June 30, 2021

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1117015	April 19, 2021	Formal	State Administrative/Compliance Order without penalty issued
1117019	April 4, 2023	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, AverageViolation 1117010 · 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

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
1117015	April 19, 2021	Formal	State Administrative/Compliance Order without penalty issued
1117019	April 4, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117043 · Chlordane · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117042 · ETHYLENE DIBROMIDE · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117041 · 1,2-DIBROMO-3-CHLOROPROPANE · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117040 · Total Polychlorinated Biphenyls (PCB) · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117039 · Pentachlorophenol · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117038 · Benzo(a)pyrene · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117037 · HEXACHLOROBENZENE · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117036 · 2,4,5-TP · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117035 · 2,4-D · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117034 · Heptachlor epoxide · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117033 · Heptachlor · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117032 · 2,3,7,8-TCDD · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117031 · LASSO · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117030 · Atrazine · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117029 · Carbofuran · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117028 · Hexachlorocyclopentadiene · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117027 · Dinoseb · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117026 · Picloram · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117025 · Di(2-ethylhexyl) phthalate · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117024 · Simazine · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117023 · OXAMYL · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117022 · Di(2-ethylhexyl) adipate · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117021 · Glyphosate · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117020 · Endothall · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117019 · Diquat · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117018 · Dalapon · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117017 · Toxaphene · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117016 · Methoxychlor · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117015 · BHC-GAMMA · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 2023	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 1117014 · Endrin · Synthetic Organic Chemicals

Noncompliance period start January 1, 2019 · period end December 31, 2021 · first reported February 16, 2023 · 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
1117017	December 15, 2022	Informal	State Formal Notice of Violation issued
1117018	January 3, 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