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Is Simi Valley, CA tap water safe?

2 utilities serve Simi Valley, 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

Neither of the 2 utilities serving Simi Valley has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.

Ventura Wwd No. 8 - Simi Valley, which serves the most people here, has 2 results above the health goal. The worst: Uranium at 9.6 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from Ventura Wwd No. 8 - Simi Valley is very hard, typically 527 mg/L (30.8 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 Simi Valley’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 Ventura Wwd No. 8 - Simi Valley’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 Simi 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 Simi Valley, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Pat-Chem Laboratories

    San Fernando, CA · about 16 miles

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

    (800) 400-5227

  • Camrosa Water District Wastewater Laboratory

    Camarillo, CA · about 20 miles

    Certified for bacteria

    (805) 248-0402

  • Fruit Growers Laboratory, Inc.

    Santa Paula, CA · about 20 miles

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

    (805) 392-2000

All 145 certified labs for California

ZIP codes in Simi Valley

Which ZIP codes are in Simi 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 Simi Valley

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

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