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Is Norwalk, CA tap water safe?

3 utilities serve Norwalk, 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 Norwalk has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.

Liberty Utilities - Bellflower - Norwalk, which serves the most people here, has 2 results above EPA’s new limit, which takes effect in 2029, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: PFOS at 59 ppt, above EPA’s new limit, which takes effect in 2029.

The water from Liberty Utilities - Bellflower - Norwalk is very hard, typically 290 mg/L (17 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 Norwalk’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 Liberty Utilities - Bellflower - Norwalk’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 Norwalk

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

  • Los Angeles County Public Health Laboratory

    Downey, CA · about 5 miles

    Certified for bacteria

    (562) 658-1300

  • Michelson Laboratories, Inc.

    Commerce, CA · about 6 miles

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

    (562) 928-0553

  • Food Microbiological Laboratories, Inc.

    Cypress, CA · about 7 miles

    Certified for bacteria

    (714) 657-7527

All 145 certified labs for California

ZIP codes in Norwalk

Which ZIP codes are in Norwalk: 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 Norwalk

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

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