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Is Claremont, CA tap water safe?

Gswc - Claremont serves Claremont, 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

Gswc - Claremont serves Claremont. In EPA’s and California’s records it has 2 results above EPA’s new limit, which takes effect in 2029, 1 result above the limit’s level with no violation recorded and 3 results above the health goal, and no health-based violation since 2016.

The worst: Arsenic at 31.4 ppb, above the limit’s level, no violation.

The water from Gswc - Claremont is moderately hard to very hard depending on the source, 71 to 305 mg/L (4.2 to 17.8 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 Gswc - Claremont’s water.

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Every claim, and more filters, in the full report

Water testing near Claremont

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

  • Enviro-Chem, Inc.

    Pomona, CA · about 6 miles

    Certified for metals

    (909) 590-5905

  • Eurofins Pomona

    Pomona, CA · about 7 miles

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

    (626) 386-1100

  • A & R Laboratories, Inc.

    Ontario, CA · about 8 miles

    Certified for bacteria

    (951) 779-0310

All 145 certified labs for California

ZIP codes in Claremont

Which ZIP codes are in Claremont: 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 Claremont

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

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