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Is Colusa, CA tap water safe?

3 utilities serve Colusa, 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

None of the 3 utilities serving Colusa has 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 Colusa, which serves the most people here, has 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 41.9 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.

The water from City of Colusa is soft to moderately hard depending on the source, 55 to 98 mg/L (3.2 to 5.8 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 Colusa’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 City of Colusa’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 Colusa

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

  • Fruit Growers Laboratory, Inc.

    Chico, CA · about 34 miles

    Certified for bacteria

    (530) 343-5818

  • Cranmer Engineering, Inc.

    Grass Valley, CA · about 50 miles

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

    (530) 273-7284

  • Eurofins Sacramento Service Center

    West Sacramento, CA · about 52 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (626) 386-1221

All 145 certified labs for California

ZIP codes in Colusa

Which ZIP codes are in Colusa: 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 Colusa

Towns nearby with a page of their own.

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