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Is Dunnigan, CA tap water safe?

2 utilities serve Dunnigan, 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

Neither of the 2 utilities serving Dunnigan has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records.

Cal Am - Dunnigan, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 4.0 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from Cal Am - Dunnigan is very hard, typically 285 mg/L (16.7 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 Dunnigan’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 Cal Am - Dunnigan’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 Dunnigan

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

  • Eurofins Sacramento Service Center

    West Sacramento, CA · about 31 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (626) 386-1221

  • Eurofins Sacramento

    West Sacramento, CA · about 31 miles

    Certified for minerals and other inorganics, organic chemicals, PFAS

    (916) 373-5600

  • Bend Genetics LLC

    Sacramento, CA · about 38 miles

    (916) 550-1048

All 145 certified labs for California

ZIP codes in Dunnigan

Which ZIP codes are in Dunnigan: 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 Dunnigan

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

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