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Is San Ramon, CA tap water safe?

3 utilities serve San Ramon, by EPA’s records. Here is what EPA’s and California’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

None of the 3 utilities serving San Ramon has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.

East Bay MUD, which serves the most people here, has 1 result above the health goal. The worst: Uranium at 5.3 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from East Bay MUD is soft to moderately hard depending on the source, 17 to 120 mg/L (1 to 7 grains per gallon). How California’s water compares.

A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in San Ramon’s ZIP codes, from EPA’s estimates.

MUD stands for municipal utility district, a local water and sewer district common in Texas.

Water testing near San Ramon

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 San Ramon, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Alpha Analytical Laboratories, Inc.

    Livermore, CA · about 4 miles

    Certified for bacteria

    (707) 769-3128

  • SGS North America

    Hayward, CA · about 13 miles

    Certified for bacteria

    (510) 266-8183

  • EMSL Analytical Inc.

    San Leandro, CA · about 14 miles

    Certified for asbestos

    (510) 895-3675

All 145 certified labs for California

ZIP codes in San Ramon

Which ZIP codes are in San Ramon: 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 San Ramon

Other towns in Contra Costa County with a page of their own.

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