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Is Hollister, CA tap water safe?

15 utilities serve Hollister, 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

7 of the 15 utilities serving Hollister 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 Hollister, San Justo Mutual Water Company, Rancho San Joaquin MWC and 4 more.

City of Hollister, which serves the most people here, has 1 result above the legal limit, 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Total trihalomethanes (TTHM) at 44.5 ppb, above the legal limit.

The water from City of Hollister is moderately hard to very hard depending on the source, 91 to 509 mg/L (5.3 to 29.8 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 Hollister’s ZIP codes, from EPA’s estimates.

5 more utilities in Hollister

By EPA’s estimate, each serves fewer people in Hollister than those above.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in City of Hollister’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 Hollister

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

  • CM Analytical, Inc.

    Gilroy, CA · about 13 miles

    Certified for bacteria

    (408) 848-3619

  • Monterey County Consolidated Environmental Laboratory

    Salinas, CA · about 21 miles

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

    (831) 755-4516

  • Bracewell Engineering, Inc.

    Morgan Hill, CA · about 22 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (669) 258-5821

All 145 certified labs for California

ZIP codes in Hollister

Which ZIP codes are in Hollister: 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 Hollister

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

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