Skip to content
TapBuff
ZIP

Is Santa Rosa, CA tap water safe?

15 utilities serve Santa Rosa, 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

5 of the 15 utilities serving Santa Rosa have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Branger Mutual Water Company, Inc., Mobile Home Estates, El Portal Mobile Estates and 2 more.

City of Santa Rosa, which serves the most people here, has 1 result above the limit’s level with no violation recorded, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Arsenic at 13.4 ppb, above the limit’s level, no violation. Health goals are stricter than legal limits and are not enforced.

The water from City of Santa Rosa is moderately hard to very hard depending on the source, 92 to 198 mg/L (5.4 to 11.6 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 Santa Rosa’s ZIP codes, from EPA’s estimates.

5 more utilities in Santa Rosa

By EPA’s estimate, each serves fewer people in Santa Rosa 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 Santa Rosa’s water, which serves the most people here. Another utility’s report names what handles its own results.

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 Santa Rosa

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

  • Sonoma County Public Health Laboratory

    Santa Rosa, CA · under a mile

    Certified for bacteria

    (707) 565-4711

  • Brelje and Race Laboratories, Inc.

    Santa Rosa, CA · about 2 miles

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

    (707) 544-8807

  • K Prime, LLC.

    Santa Rosa, CA · about 6 miles

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

    (707) 527-7574

All 145 certified labs for California

ZIP codes in Santa Rosa

Which ZIP codes are in Santa Rosa: 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 Santa Rosa

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

What to do next