Public water system record
Marin Municipal Water District
Serves an area of Marin County, CA that includes San Rafael, Mill Valley, Tamalpais-Homestead Valley and 18 more places · 186,895 people served
Federal records show no health-based violations and no monitoring or reporting issues for Marin Municipal 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
- Marin Municipal Water District draws water from 9 surface water intakes.
- Lead pipe inventory: 0 lead and 0 unknown out of 63,060 service lines.
Check whether Marin Municipal 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
Marin Municipal Water District draws water from 9 surface water intakes. It also buys water from Sonoma County Water Agency. 1 other community water system buys water from Marin Municipal Water District.
Buys water from
- Sonoma County Water Agency Santa Rosa, CA
Community systems that buy water from it
- NPS Ggnra Sausalito, CA
Annual water quality report
Marin Municipal 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