Is Frenchtown, MT tap water safe?
The short answer
2 of the 8 utilities serving Frenchtown have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Montana’s records: King Ranch Subdivision and Elk Meadows Ranchettes.
King Ranch Subdivision, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 3.0 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 Frenchtown’s ZIP codes, from EPA’s estimates.
- Open report
King Ranch Subdivision
Montana · serves 70 people · under 100 in Frenchtown
2 results above the health goal. The worst: Arsenic at 3.0 ppb, above the health goal.
1 health-based violation since 2016
- Open report
Grinell Estates HOA
Montana · serves 48 people · under 100 in Frenchtown
3 results above the health goal. The worst: Arsenic at 4.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Frenchtown Valley View Tr CT
Montana · serves 50 people · under 100 in Frenchtown
3 results above the health goal. The worst: Arsenic at 2.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Glessner Trailer Court
Montana · serves 67 people · under 100 in Frenchtown
3 results above the health goal. The worst: Arsenic at 4.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
El Mar Estates Msla Co Water
Montana · serves 1,350 people · lists Frenchtown among the places it serves
3 results above the health goal. The worst: Lead at 1.0 ppb, above the health goal. Hardness: very hard, typically 200 mg/L (11.7 grains per gallon).
No health-based violations since 2016
- Open report
Sorrel Springs HOA
Montana · serves 250 people · lists Frenchtown among the places it serves
3 results above the health goal. The worst: Arsenic at 5.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Elk Meadows Ranchettes
Montana · serves 175 people · lists Frenchtown among the places it serves
1 result above the health goal. The worst: Lead at 1.0 ppb, above the health goal.
2 health-based violations since 2016
- Open report
Meadow Brook Park
Montana · serves 120 people · lists Frenchtown among the places it serves
3 results above the health goal. The worst: Arsenic at 2.0 ppb, above the health goal.
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 King Ranch Subdivision’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic
Water testing near Frenchtown
The 3 labs Montana certifies closest to Frenchtown, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Mission Mountain Laboratories
Ravalli, MT · about 15 miles
Certified for bacteria
RD Water Lab, LLC
Missoula, MT · about 17 miles
Certified for bacteria
Water Technologies Laboratory
Missoula, MT · about 18 miles
Certified for bacteria
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 MontanaZIP codes in Frenchtown
Which ZIP codes are in Frenchtown: 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 Frenchtown
Other towns in Missoula County with a page of their own.
What to do next
- Read King Ranch Subdivision’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for ArsenicRanked by certification and what they cost over five years.The best reverse osmosis systems, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water