Public water system record

Cedar Valley Mutual Water Co

Serves Oakhurst, Madera County, CA · 137 people served

Federal records show 29 health-based violations and 3 monitoring/reporting issues for Cedar Valley Mutual Water Co in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

CA2000538
OAKHURST
CA
137 served

System profile

Source water Groundwater

ZIP 93644

EPA system ID CA2000538

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 29
Resolved: 0
Unresolved: 1
Archived by EPA: 28
Any acute record: No
Monitoring issues, last 10 years: 3

Key facts

Cedar Valley Mutual Water Co draws water from 1 spring.
Highest measured level in the last 10 years: Arsenic, 0.022053 mg/L, federal limit 0.01 mg/L (2.2 times the limit), 2021.
Most recent formal enforcement: compliance order (no penalty) by California, June 2015.
Record on file since 1980, with 30 health-based violations before October 19, 2016.

Check whether Cedar Valley Mutual Water Co serves your address

Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant	Rule family	Start date	Status	Acute
Arsenic Contaminant limit exceeded Measured 0.0192 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	330	Oct 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	330	Jul 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	330	Apr 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	330	Jan 1, 2025	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
LEAD AND COPPER RULE REVISIONS Treatment technique failure	350	Oct 17, 2024	Active	No
Arsenic Contaminant limit exceeded Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	330	Oct 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	330	Jul 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)	330	Apr 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	330	Jan 1, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0167 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	330	Oct 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0161 mg/L, federal limit 0.01 mg/L (1.6 times the limit)	330	Jul 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0172 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	330	Apr 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0173 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	330	Jan 1, 2022	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.01975 mg/L, federal limit 0.01 mg/L (2 times the limit)	330	Oct 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.021975 mg/L, federal limit 0.01 mg/L (2.2 times the limit)	330	Jul 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.022053 mg/L, federal limit 0.01 mg/L (2.2 times the limit)	330	Apr 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.02061 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	330	Jan 1, 2021	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.020903 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	330	Oct 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.020445 mg/L, federal limit 0.01 mg/L (2 times the limit)	330	Jul 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.020433 mg/L, federal limit 0.01 mg/L (2 times the limit)	330	Apr 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.021618 mg/L, federal limit 0.01 mg/L (2.2 times the limit)	330	Jan 1, 2020	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.021195 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	330	Oct 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0208 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	330	Jul 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.019623 mg/L, federal limit 0.01 mg/L (2 times the limit)	330	Apr 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.02071 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	330	Jan 1, 2019	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.02004 mg/L, federal limit 0.01 mg/L (2 times the limit)	330	Jan 1, 2018	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.021583 mg/L, federal limit 0.01 mg/L (2.2 times the limit)	330	Oct 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.022 mg/L, federal limit 0.01 mg/L (2.2 times the limit)	330	Jan 1, 2017	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 0.0209 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	330	Jan 1, 2016	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue	Start date	Status
LEAD AND COPPER RULE REVISIONS RPT	Oct 17, 2024	Active
Arsenic Monitoring and reporting	Jul 1, 2017	Resolved
Arsenic Monitoring and reporting	Apr 1, 2017	Resolved

Full record since 1980

EPA's records for Cedar Valley Mutual Water Co go back to 1980. Before October 19, 2016 they list 30 health-based violations (1 resolved, 29 archived by EPA without a recorded fix) and 4 monitoring or reporting violations.

Violations that began in	Health-based	Monitoring and reporting
1980s	0	3
1990s	0	1
2000s	5	0
2010 to October 18, 2016	25	0
October 19, 2016 to 2019	7	2
2020s	21	1

Most recent health-based violation before October 19, 2016: Arsenic, began July 2016, Archived.

Show all 30 health-based violations before October 19, 2016

Contaminant	Start date	Status
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Jul 1, 2016	Archived
Arsenic Contaminant limit exceeded Measured 0.0209 mg/L, federal limit 0.01 mg/L (2.1 times the limit)	Jan 1, 2016	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Jul 1, 2015	Archived
Arsenic Contaminant limit exceeded Measured 0.01816 mg/L, federal limit 0.01 mg/L (1.8 times the limit)	Jan 1, 2015	Archived
Total Coliform (acute) Contaminant limit exceeded	Nov 1, 2014	Resolved
Arsenic Contaminant limit exceeded	Oct 1, 2014	Archived
Arsenic Contaminant limit exceeded Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	Jul 1, 2014	Archived
Arsenic Contaminant limit exceeded Measured 0.026 mg/L, federal limit 0.01 mg/L (2.6 times the limit)	Apr 1, 2014	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Jan 1, 2014	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Oct 1, 2013	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Jul 1, 2013	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Apr 1, 2013	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Jan 1, 2013	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Oct 1, 2012	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Jul 1, 2012	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Apr 1, 2012	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Jan 10, 2012	Archived
Arsenic Contaminant limit exceeded Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)	Oct 1, 2011	Archived
Arsenic Contaminant limit exceeded Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)	Jul 1, 2011	Archived
Arsenic Contaminant limit exceeded Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)	Apr 1, 2011	Archived
Arsenic Contaminant limit exceeded Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)	Jan 1, 2011	Archived
Arsenic Contaminant limit exceeded Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)	Oct 1, 2010	Archived
Arsenic Contaminant limit exceeded Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)	Jul 1, 2010	Archived
Arsenic Contaminant limit exceeded Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)	Apr 1, 2010	Archived
Arsenic Contaminant limit exceeded Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)	Jan 1, 2010	Archived
Arsenic Contaminant limit exceeded Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)	Oct 1, 2009	Archived
Arsenic Contaminant limit exceeded Measured 0.015 mg/L, federal limit 0.01 mg/L (1.5 times the limit)	Jul 1, 2009	Archived
Arsenic Contaminant limit exceeded Measured 0.015 mg/L, federal limit 0.01 mg/L (1.5 times the limit)	Apr 1, 2009	Archived
Arsenic Contaminant limit exceeded Measured 0.015 mg/L, federal limit 0.01 mg/L (1.5 times the limit)	Jan 1, 2009	Archived
Arsenic Contaminant limit exceeded Measured 0.015 mg/L, federal limit 0.01 mg/L (1.5 times the limit)	Oct 1, 2007	Archived

Enforcement actions

California regulators took 2 formal enforcement actions against Cedar Valley Mutual Water Co between 2014 and 2015. The most recent was a compliance order (no penalty) in June 2015.

Date	By	Action	Violations covered
Jun 15, 2015	California	Compliance order (no penalty)	35 violations (35 health-based): Arsenic
Aug 12, 2014	California	Compliance order (no penalty)	26 violations (26 health-based): Arsenic

What the violations mean

Arsenic

28 incidents

Arsenic exceeded the federal limit

Long-term arsenic exposure is linked to cancer and cardiovascular effects

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Cedar Valley Mutual Water Co draws water from 1 spring.

Annual water quality report

Cedar Valley Mutual Water Co must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Cedar Valley Mutual Water Co for a copy.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by California.

Certified drinking water labs by state EPA guidance for private wells