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Is Twain Harte, CA tap water safe?

8 utilities serve Twain Harte, 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

3 of the 8 utilities serving Twain Harte have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Leisure Pines Mutual Water Co, Twain Harte Valley MWC and Sugar Pine Rv Resort.

Tud - Upper Basin Water System, which serves the most people here, has 2 results above the health goal. The worst: Uranium at 10.9 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from Tud - Upper Basin Water System is soft to moderately hard depending on the source, 9.8 to 120 mg/L (0.6 to 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 Twain Harte’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 Tud - Upper Basin Water System’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 Twain Harte

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

  • Precision Enviro-Tech

    Twain Harte, CA · about 3 miles

    Certified for bacteria

    (209) 477-8105

  • 49er Water Laboratory

    Jackson, CA · about 34 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (530) 277-2770

  • Aemtek, Inc.

    Modesto, CA · about 46 miles

    Certified for bacteria

    (510) 979-1979

All 145 certified labs for California

ZIP codes in Twain Harte

Which ZIP codes are in Twain Harte: 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 Twain Harte

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

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