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Is Great Falls, MT tap water safe?

12 utilities serve Great Falls, 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

7 of the 12 utilities serving Great Falls have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Montana’s records: City of Great Falls, Malmstrom Air Force Base, Gore Hill County Water Dist and 4 more.

City of Great Falls, 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 80.8 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.

The water from City of Great Falls is hard, 145 mg/L (8.5 grains per gallon). How Montana’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 Great Falls’s ZIP codes, from EPA’s estimates.

2 more utilities in Great Falls

By EPA’s estimate, each serves fewer people in Great Falls than those above.

  • Park Garden Estatesserves 50 people · lists Great Falls among the places it serves · no health-based violations since 2016
  • Sunset Boulder MHP LLCserves 45 people · lists Great Falls among the places it serves · no health-based violations since 2016

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in City of Great Falls’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 Great Falls

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

  • Energy Laboratories, Inc.

    Helena, MT · about 69 miles

    Certified for bacteria, minerals and other inorganics, organic chemicals

    (406) 442-0711

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 Great Falls

Which ZIP codes are in Great Falls: 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 Great Falls

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

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