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Is Madison, CA tap water safe?

2 utilities serve Madison, 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

1 of the 2 utilities serving Madison has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Madison Service Dist.

Madison Service Dist, which serves the most people here, has 1 result above the health goal. The worst: Uranium at 1.7 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from Madison Service Dist is hard to very hard depending on the source, 150 to 320 mg/L (8.8 to 18.7 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 Madison’s ZIP codes, from EPA’s estimates.

Water testing near Madison

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 Madison, 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 25 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (626) 386-1221

  • Eurofins Sacramento

    West Sacramento, CA · about 25 miles

    Certified for minerals and other inorganics, organic chemicals, PFAS

    (916) 373-5600

  • Napa-Solano-Yolo-Marin Public Health Laboratory

    Fairfield, CA · about 33 miles

    Certified for bacteria

    (707) 784-4410

All 145 certified labs for California

ZIP codes in Madison

Which ZIP codes are in Madison: 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 Madison

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

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