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Is Mountain House, CA tap water safe?

City of Mountain House serves Mountain House, 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

City of Mountain House serves Mountain House. 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 2.5 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from City of Mountain House is moderately hard, typically 84 mg/L (4.9 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 City of Mountain House’s water.

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Every claim, and more filters, in the full report

Water testing near Mountain House

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 Mountain House, 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 17 miles

    Certified for bacteria

    (707) 769-3128

  • San Joaquin County Public Health Laboratory

    Stockton, CA · about 22 miles

    Certified for bacteria

    (209) 468-3460

  • Precision Enviro-Tech

    Stockton, CA · about 23 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics

    (209) 405-0601

All 145 certified labs for California

ZIP codes in Mountain House

Which ZIP codes are in Mountain House: 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 Mountain House

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

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