CA4000750 · California

RIM ROCK WATER COMPANY

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

Violation records shown: 25
EPA health-based flag: 24
Health-based records unresolved in this snapshot: 0
Monitoring and reporting records: 1

Counties listed by EPA · San Luis Obispo County, California

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

Violations and what followed

Among 25 resolved records with both dates, the median interval from recorded noncompliance start to EPA’s return-to-compliance date was 90 days. The interval uses the reporting periods and dates on file.

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500037 · Arsenic · Arsenic Rule

Noncompliance period start April 1, 2025 · period end June 30, 2025 · first reported June 30, 2025 · EPA return-to-compliance field June 30, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500036 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2025 · period end March 31, 2025 · first reported April 1, 2025 · EPA return-to-compliance field March 31, 2025

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500035 · Arsenic · Arsenic Rule

Noncompliance period start October 1, 2024 · period end December 31, 2024 · first reported February 24, 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
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500034 · Arsenic · Arsenic Rule

Noncompliance period start July 1, 2024 · period end September 30, 2024 · first reported October 2, 2024 · EPA return-to-compliance field September 30, 2024

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500033 · Arsenic · Arsenic 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

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500032 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported May 15, 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
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500030 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2024 · period end March 31, 2024 · first reported May 15, 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
500127	January 25, 2024	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500028 · Arsenic · Arsenic Rule

Noncompliance period start July 1, 2023 · period end September 30, 2023 · first reported October 2, 2023 · EPA return-to-compliance field September 30, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500027 · Arsenic · Arsenic Rule

Noncompliance period start April 1, 2023 · period end June 30, 2023 · first reported July 3, 2023 · EPA return-to-compliance field June 30, 2023

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

Monitoring or reporting · Resolved

Monitoring, RegularViolation 500031 · Nitrate · Nitrate Rule

Noncompliance period start January 1, 2023 · period end December 31, 2023 · first reported February 15, 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
500128	January 29, 2024	Formal	State Administrative/Compliance Order without penalty issued
500129	March 26, 2024	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500026 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2023 · period end March 31, 2023 · first reported March 31, 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
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500025 · Arsenic · Arsenic Rule

Noncompliance period start October 1, 2022 · period end December 31, 2022 · first reported February 16, 2023 · EPA return-to-compliance field December 31, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500024 · Arsenic · Arsenic Rule

Noncompliance period start July 1, 2022 · period end September 30, 2022 · first reported November 17, 2022 · EPA return-to-compliance field September 30, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500023 · Arsenic · Arsenic Rule

Noncompliance period start April 1, 2022 · period end June 30, 2022 · first reported August 17, 2022 · EPA return-to-compliance field June 30, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500022 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2022 · period end March 31, 2022 · first reported March 31, 2022 · EPA return-to-compliance field March 31, 2022

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500021 · Arsenic · Arsenic 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
500125	January 29, 2020	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500020 · Arsenic · Arsenic 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
500123	March 15, 2018	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500019 · Arsenic · Arsenic 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
500123	March 15, 2018	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500018 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2021 · period end March 31, 2021 · first reported August 12, 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
500123	March 15, 2018	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500017 · Arsenic · Arsenic Rule

Noncompliance period start October 1, 2020 · period end December 31, 2020 · first reported August 12, 2021 · EPA return-to-compliance field December 31, 2020

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500123	March 15, 2018	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500016 · Arsenic · Arsenic Rule

Noncompliance period start July 1, 2020 · period end September 30, 2020 · first reported August 12, 2021 · EPA return-to-compliance field September 30, 2020

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500123	March 15, 2018	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500015 · Arsenic · Arsenic Rule

Noncompliance period start April 1, 2020 · period end June 30, 2020 · first reported August 12, 2021 · EPA return-to-compliance field June 30, 2020

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500123	March 15, 2018	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500014 · Arsenic · Arsenic Rule

Noncompliance period start January 1, 2020 · period end March 31, 2020 · first reported August 12, 2021 · EPA return-to-compliance field March 31, 2020

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500123	March 15, 2018	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500013 · Arsenic · Arsenic Rule

Noncompliance period start October 1, 2019 · period end December 31, 2019 · first reported August 12, 2021 · EPA return-to-compliance field December 31, 2019

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500123	March 15, 2018	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	Resolving	State Compliance achieved

EPA health-based flag · Resolved

Maximum Contaminant Level Violation, Single SampleViolation 500012 · Arsenic · Arsenic Rule

Noncompliance period start July 1, 2019 · period end September 30, 2019 · first reported August 12, 2021 · EPA return-to-compliance field September 30, 2019

2 linked actions

Enforcement and resolution records linked by EPA
Action ID	Date	Category	EPA action type
500123	March 15, 2018	Formal	State Administrative/Compliance Order without penalty issued
500130	July 10, 2025	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