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Is Winthrop, WA tap water safe?

2 utilities serve Winthrop, by EPA’s records. Here is what EPA’s and Washington’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 Winthrop has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Washington’s records.

Town of Winthrop, which serves the most people here, has 2 results above the health goal. The worst: Lead at 1.0 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

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 Winthrop’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 Town of Winthrop’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 Winthrop

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 Washington certifies.

The lab Washington certifies closest to Winthrop, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Okanogan County Public Health Laboratory

    Okanogan, WA · about 39 miles

    Certified for bacteria, nitrate

    (509) 422-7140

All 84 certified labs for Washington

ZIP codes in Winthrop

Which ZIP codes are in Winthrop: 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: Washington State Department of Ecology, Lab Accreditation Program, environmental laboratories accredited for drinking water analyses; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Winthrop

Towns nearby with a page of their own.

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