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Is Rancho Cucamonga, CA tap water safe?

Cucamonga Valley Water District serves Rancho Cucamonga, 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

Cucamonga Valley Water District serves Rancho Cucamonga. In EPA’s and California’s records it has 3 results above the health goal, and no health-based violation since 2016.

The worst: Nitrate at 16 ppm, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from Cucamonga Valley Water District is moderately hard to very hard depending on the source, 86 to 244 mg/L (5 to 14.3 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 Cucamonga Valley Water District’s water.

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Every claim, and more filters, in the full report

Water testing near Rancho Cucamonga

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

  • A & R Laboratories, Inc.

    Ontario, CA · about 8 miles

    Certified for bacteria

    (951) 779-0310

  • Enviro-Chem, Inc.

    Pomona, CA · about 12 miles

    Certified for metals

    (909) 590-5905

  • Western Analytical Laboratories, Inc.

    Chino, CA · about 12 miles

    Certified for bacteria, minerals and other inorganics

    (909) 627-3628

All 145 certified labs for California

ZIP codes in Rancho Cucamonga

Which ZIP codes are in Rancho Cucamonga: 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 Rancho Cucamonga

Other towns in San Bernardino County with a page of their own.

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