Is Bonner-West Riverside, MT tap water safe?
The short answer
None of the 3 utilities serving Bonner-West Riverside has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Montana’s records.
Missoula Water, 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 15 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
The water from Missoula Water is moderately hard to very hard depending on the source, 109 to 224 mg/L (6.4 to 13.1 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 Bonner-West Riverside’s ZIP codes, from EPA’s estimates.
- Open report
Missoula Water
Montana · serves 68,200 people · about 520 in Bonner-West Riverside
3 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 15 ppb, above EPA’s health benchmark. Hardness: moderately hard to very hard depending on the source, 109 to 224 mg/L (6.4 to 13.1 grains per gallon).
No health-based violations since 2016
- Open report
Milltown Water Users Asso South
Montana · serves 85 people · nearly all in Bonner-West Riverside
2 results above the health goal. The worst: Arsenic at 2.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Bonner Housing PWS System
Montana · serves 128 people · under 100 in Bonner-West Riverside
1 result above the health goal. The worst: Uranium at 0.5 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 Missoula Water’s water, which serves the most people here. Another utility’s report names what handles its own results.
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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: Lead, 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: Lead, Arsenic
Water testing near Bonner-West Riverside
The 3 labs Montana certifies closest to Bonner-West Riverside, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Missoula CCHD Water Lab
Missoula, MT · about 6 miles
Certified for bacteria
RD Water Lab, LLC
Missoula, MT · about 10 miles
Certified for bacteria
Water Technologies Laboratory
Missoula, MT · about 11 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 MontanaWhich ZIP codes are in Bonner-West Riverside: 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 Bonner-West Riverside
Other towns in Missoula County with a page of their own.
What to do next
- Read Missoula Water’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water