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Is West Yellowstone, MT tap water safe?

4 utilities serve West Yellowstone, by EPA’s records. Here is what EPA’s and Montana’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

2 of the 4 utilities serving West Yellowstone have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Montana’s records: Town of West Yellowstone and Fishermans Village Subdivision.

Town of West Yellowstone, which serves the most people here, has 3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 70 ppb, above EPA’s health benchmark. 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 West Yellowstone’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 West Yellowstone’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 West Yellowstone

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 Montana certifies.

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

  • Bridger Analytical Laboratory

    Bozeman, MT · about 58 miles

    Certified for bacteria, minerals and other inorganics

    (406) 582-0822

Montana State Environmental Laboratory: Private well testing packages for bacteria, metals, nutrients, anions, organic chemicals and more, open to the public. Samples can be mailed, sent by the lab's free courier, or dropped off at the lab. Environmental Laboratory, Montana Department of Public Health and Human Services.

All 36 certified labs for Montana

ZIP codes in West Yellowstone

Which ZIP codes are in West Yellowstone: 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: Montana Department of Public Health and Human Services, Water Laboratory Certification Program, certified laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near West Yellowstone

Towns nearby with a page of their own.

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