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Is Tamalpais-Homestead Valley, CA tap water safe?

Marin Municipal Water District serves Tamalpais-Homestead Valley, by EPA’s records. Here is what EPA’s and California’s records show for it, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

Marin Municipal Water District serves Tamalpais-Homestead Valley. In EPA’s and California’s records it has 1 result above the health goal, and no health-based violation since 2016.

The worst: Arsenic at 0.27 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from Marin Municipal Water District is soft to moderately hard depending on the source, 53 to 117 mg/L (3.1 to 6.8 grains per gallon). How California’s water compares.

Some homes in a town are on private wells or a small system of their own. The name on your water bill tells you which is yours.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in Marin Municipal Water District’s water.

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Every claim, and more filters, in the full report

Water testing near Tamalpais-Homestead Valley

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab California certifies.

The 3 labs California certifies closest to Tamalpais-Homestead Valley, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Cel Analytical, Inc.

    San Francisco, CA · about 12 miles

    Certified for bacteria, minerals and other inorganics

    (415) 882-1690

  • Asbestos TEM Laboratories, Inc

    Oakland, CA · about 15 miles

    Certified for asbestos

    (510) 704-8930

  • Eurofins Built Environment Testing West, LLC

    Emeryville, CA · about 15 miles

    Certified for lead and copper

    (510) 653-0824

All 145 certified labs for California

ZIP codes in Tamalpais-Homestead Valley

Which ZIP codes are in Tamalpais-Homestead Valley: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: California State Water Resources Control Board, ELAP accredited laboratories and their fields of accreditation; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Tamalpais-Homestead Valley

Other towns in Marin County with a page of their own.

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