West Yellowstone Tap Water Quality Report
West Yellowstone's water has 2 contaminants above EPA MCLGs. Consider using a certified water filter for additional protection.
1 other system serving parts of West Yellowstone reports results above guidelines — check which system bills you. HEBGEN LAKE ESTATES CO WATER SEWER DISTR (2 above guidelines)
Water system
WEST YELLOWSTONE TOWN OF
2 other systems also serve parts of West Yellowstone. See their figures
People Served
9,899
Health-based violations since 2020
0
WEST YELLOWSTONE TOWN OF. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Jun 2022 · WEST YELLOWSTONE TOWN OF
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is West Yellowstone Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. West Yellowstone's water has 2 contaminants above EPA health-based guidelines (MCLGs), while it meets federal legal limits.
WEST YELLOWSTONE TOWN OF, West Yellowstone's water system, serves 9,899 people. 2 other systems also serve parts of West Yellowstone. Each system's results are listed under its own name, never added to WEST YELLOWSTONE TOWN OF's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for WEST YELLOWSTONE TOWN OF is from Jun 2022.
In EPA's 2023–2026 UCMR 5 testing, WEST YELLOWSTONE TOWN OF measured lithium at up to 70 µg/L, which EPA counts as above its health reference level of 10 µg/L. That level is a screening value EPA uses to decide what to study further, not a legal limit, and this result does not change this page's water-quality summary.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Montana
West Yellowstone Water Service Areas
What these numbers actually mean for West Yellowstone, MT
We read West Yellowstone, MT’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 2 contaminants above EPA MCLGs and 7 contaminants with an EPA health goal detected in some samples (no level on file)
- 144 results on file
- 23 PFAS compounds on record
Buying a home here? Property Water Report — $49 Emailed within one business day.
Get the Weekly Water Brief
One email a week on water testing, treatment, and what water-quality data means for your home.
Free forever. Unsubscribe anytime. We never share your email.
Recommended Water Filters for West Yellowstone
Based on West Yellowstone's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
AquaTru
Carafe
NSF Certified:
Flow Rate
0.3 gpm
Daily Production
4 gpd
Highlights:
- Verified PFAS reduction
- Glass collection vessel
- Plug-and-play installation
- NSF-53, NSF-42, NSF-58, NSF-401, NSF-372 certified
Removes 17 contaminants:
+12 more
Arsenic, 83+ contaminants, Copper, Total THMs, Chloroform, Chloride, Sulfate, Nitrate (as N), Molybdenum, Barium, Strontium, Uranium
Waterdrop
G3 P600
NSF Certified:
Flow Rate
600 gpm
Daily Production
600 gpd
Highlights:
- Space-saving design
- Good contaminant reduction
- NSF-58 certified
Removes 4 contaminants:
Waterdrop
A1
NSF Certified:
Flow Rate
0.042 gpm
Daily Production
130 gpd
Highlights:
- Built-in UV sterilization
- Easy maintenance with filter change reminders
- NSF-58 certified
- Hot and cold water dispensing
Removes 12 contaminants:
+7 more
Molybdenum, Sulfate, Strontium, Phosphorus, Chlorine, Barium, Nitrate
Filters for what West Yellowstone reported
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What West Yellowstone's water readings can explain
We publish a city-level hardness figure for West Yellowstone, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near West Yellowstone? Public-water results do not apply to private wells. See Gallatin County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in West Yellowstone
West Yellowstone's tap water has an estimated 7.8 grains per gallon (134.0 mg/L, county sampling in Gallatin County) — hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for an estimated 7.8 gpg water in West Yellowstone — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For Montana as a whole, read water softener cost in Montana — priced against the plumber wage published for the state.
Frequently Asked Questions About West Yellowstone Tap Water
West Yellowstone's water has 2 contaminants above EPA MCLGs. While the water meets federal legal limits, we recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach WEST YELLOWSTONE TOWN OF. For a problem with your water now (discolored water, no water, low pressure, a leak), contact WEST YELLOWSTONE TOWN OF directly.
Check another location
Get the Weekly Water Brief
One email a week on water testing, treatment, and what water-quality data means for your home.
One email a week. Unsubscribe anytime.