Public water system record
Moulton Niguel Water District
Serves Laguna Niguel, Aliso Viejo, Mission Viejo and 1 more place, Orange County, CA · 170,236 people served
Federal records show no health-based violations and no monitoring or reporting issues for Moulton Niguel Water District in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Moulton Niguel Water District buys its water from Metropolitan Water Dist. of So. Cal. and Joint Regional Water Supply System.
- Lead pipe inventory: 0 lead and 0 unknown out of 52,442 service lines.
Check whether Moulton Niguel Water District serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016, and no monitoring or reporting violations either.
Where the water comes from
Moulton Niguel Water District buys its water from Metropolitan Water Dist. of So. Cal. and Joint Regional Water Supply System. It lists no wells or intakes of its own. It also has emergency connections to South Coast Water District, El Toro Water District, Santa Margarita Water District and Irvine Ranch Water District. 1 other community water system buys water from Moulton Niguel Water District. 4 other public water systems have emergency connections to Moulton Niguel Water District.
Buys water from
- Metropolitan Water Dist. of So. Cal. La Verne, CA
- Joint Regional Water Supply System Laguna Beach, CA
Emergency or part-time connections to
- South Coast Water District Laguna Beach, CA
- El Toro Water District Lake Forest, CA
- Santa Margarita Water District Rancho Santa Margarita, CA
- Irvine Ranch Water District Irvine, CA
Community systems that buy water from it
- El Toro Water District Lake Forest, CA
Annual water quality report
Moulton Niguel Water District 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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