Is Sand Coulee, MT tap water safe?
The short answer
1 of the 4 utilities serving Sand Coulee has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Montana’s records: Sand Coulee Water Users District.
Tracy Water Users Corp, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 2.0 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 Sand Coulee’s ZIP codes, from EPA’s estimates.
- Open report
Tracy Water Users Corp
Montana · serves 200 people · under 100 in Sand Coulee
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
Sand Coulee Water Users District
Montana · serves 180 people · under 100 in Sand Coulee
3 results above the health goal. The worst: Lead at 3.0 ppb, above the health goal.
1 health-based violation since 2016
- Open report
Big Stone Colony Inc
Montana · serves 130 people · lists Sand Coulee among the places it serves
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
Grassland Colony
Montana · serves 80 people · lists Sand Coulee among the places it serves
2 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 Tracy Water Users Corp’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 Sand Coulee
The lab Montana certifies closest to Sand Coulee, 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 67 miles
Certified for bacteria, minerals and other inorganics, organic chemicals
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 Sand Coulee
Which ZIP codes are in Sand Coulee: 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 Sand Coulee
Other towns in Cascade County with a page of their own.
What to do next
- Read Tracy Water Users Corp’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