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Is Porterville, CA tap water safe?

9 utilities serve Porterville, 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

6 of the 9 utilities serving Porterville have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: City of Porterville, Porterville - Jones Corner, Williams Mutual Water Company and 3 more.

City of Porterville, which serves the most people here, has 2 results above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 23 ppt, above EPA’s new limit, which takes effect in 2029.

The water from City of Porterville is moderately hard to very hard depending on the source, 70 to 190 mg/L (4.1 to 11.1 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 Porterville’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 City of Porterville’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 Porterville

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

  • Sierra Dairy Laboratory

    Tulare, CA · about 31 miles

    Certified for bacteria

    (559) 686-2070

  • Fruit Growers Laboratory, Inc.

    Visalia, CA · about 39 miles

    Certified for bacteria

    (559) 734-9473

  • Pace Analytical Services, LLC dba BC Laboratories, Inc.

    Bakersfield, CA · about 42 miles

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

    (661) 327-4911

All 145 certified labs for California

ZIP codes in Porterville

Which ZIP codes are in Porterville: 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 Porterville

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

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