Public water system record

North Trails Mutual Water Company

Serves Agua Dulce, Los Angeles County, CA · 100 people served

Federal records show 16 health-based violations and 4 monitoring/reporting issues for North Trails Mutual Water Company in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

CA1907014
AGUA DULCE
CA
100 served

System profile

Source water Groundwater

ZIP 91390

EPA system ID CA1907014

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 16
Resolved: 2
Unresolved: 1
Archived by EPA: 13
Any acute record: Yes
Monitoring issues, last 10 years: 4

Key facts

North Trails Mutual Water Company draws water from 3 wells.
Highest measured level in the last 10 years: Arsenic, 13 µg/L, federal limit 10 µg/L (1.3 times the limit), 2020.
Most recent formal enforcement: compliance order (no penalty) by California, June 2024.
Record on file since 1993, with 0 health-based violations before October 19, 2016.

Check whether North Trails Mutual Water Company 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
LEAD AND COPPER RULE REVISIONS Treatment technique failure	350	Oct 17, 2024	Active	No
Nitrate Contaminant limit exceeded Measured 11.6 mg/L, federal limit 10 mg/L (1.2 times the limit)	330	Jun 26, 2024	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	Yes
Arsenic Contaminant limit exceeded Measured 11 µg/L, federal limit 10 µg/L (1.1 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 11 µg/L, federal limit 10 µg/L (1.1 times the limit)	330	Apr 1, 2023	Archived Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.	No
Arsenic Contaminant limit exceeded Measured 11 µg/L, federal limit 10 µg/L (1.1 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 11 µg/L, federal limit 10 µg/L (1.1 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 11 µg/L, federal limit 10 µg/L (1.1 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 11 µg/L, federal limit 10 µg/L (1.1 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 12 µg/L, federal limit 10 µg/L (1.2 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 13 µg/L, federal limit 10 µg/L (1.3 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 12 µg/L, federal limit 10 µg/L (1.2 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 12 µg/L, federal limit 10 µg/L (1.2 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
Fluoride Contaminant limit exceeded Measured 5 mg/L, federal limit 4 mg/L (1.3 times the limit)	330	Oct 1, 2019	Resolved	No
Arsenic Contaminant limit exceeded Measured 12 µg/L, federal limit 10 µg/L (1.2 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
Fluoride Contaminant limit exceeded Measured 5.1 mg/L, federal limit 4 mg/L (1.3 times the limit)	330	Jul 1, 2019	Resolved	No
Arsenic Contaminant limit exceeded Measured 13 µg/L, federal limit 10 µg/L (1.3 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

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
Lead and Copper Rule Monitoring and reporting	Oct 1, 2018	Resolved
Revised Total Coliform Rule Monitoring violation	Dec 1, 2017	Resolved
Nitrate Monitoring and reporting	Jan 1, 2017	Resolved

Full record since 1993

EPA's records for North Trails Mutual Water Company go back to 1993. Before October 19, 2016 they list no health-based violations and 2 monitoring or reporting violations.

Violations that began in	Health-based	Monitoring and reporting
1990s	0	1
2010 to October 18, 2016	0	1
October 19, 2016 to 2019	4	3
2020s	12	1

Enforcement actions

California regulators took 6 formal enforcement actions against North Trails Mutual Water Company between 2013 and 2024. The most recent was a compliance order (no penalty) in June 2024.

Date	By	Action	Violations covered
Jun 26, 2024	California	Compliance order (no penalty)	1 violation (1 health-based): Nitrate
Sep 1, 2019	California	Compliance order (no penalty)	2 violations (2 health-based): Arsenic
Jul 25, 2019	California	Compliance order (no penalty)	12 violations (12 health-based): Arsenic, Fluoride
Dec 3, 2018	California	Compliance order (no penalty)	1 violation: Lead and Copper Rule
Jul 12, 2018	California	Compliance order (no penalty)	1 violation: Nitrate
Feb 28, 2013	California	Compliance order (no penalty)	1 violation: Total Coliform

What the violations mean

Arsenic

12 incidents

Arsenic exceeded the federal limit

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

Fluoride

2 incidents

Fluoride exceeded the federal limit

Excessive fluoride can cause dental and skeletal fluorosis

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.

Nitrate

1 incident

Nitrate exceeded the federal limit

High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome

Where the water comes from

North Trails Mutual Water Company draws water from 3 wells.

Annual water quality report

North Trails Mutual Water Company 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 North Trails Mutual Water Company 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