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Is West Whittier-Los Nietos, CA tap water safe?

3 utilities serve West Whittier-Los Nietos, 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

1 of the 3 utilities serving West Whittier-Los Nietos has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: San Gabriel Valley Water Co. - El Monte.

San Gabriel Valley Water Co. - El Monte, which serves the most people here, has 3 results above the health goal. The worst: Nitrate at 23 ppm, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from San Gabriel Valley Water Co. - El Monte is moderately hard to very hard depending on the source, 91 to 340 mg/L (5.3 to 19.9 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 West Whittier-Los Nietos’s ZIP codes, from EPA’s estimates.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in San Gabriel Valley Water Co. - El Monte’s water, which serves the most people here. Another utility’s report names what handles its own results.

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Every claim, and more filters, in the full report

Water testing near West Whittier-Los Nietos

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 West Whittier-Los Nietos, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Michelson Laboratories, Inc.

    Commerce, CA · about 4 miles

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

    (562) 928-0553

  • Weck Laboratories, Inc.

    City of Industry, CA · about 6 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity

    (626) 336-2139

  • Los Angeles County Public Health Laboratory

    Downey, CA · about 6 miles

    Certified for bacteria

    (562) 658-1300

All 145 certified labs for California

ZIP codes in West Whittier-Los Nietos

Which ZIP codes are in West Whittier-Los Nietos: 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 West Whittier-Los Nietos

Other towns in Los Angeles County with a page of their own.

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