West Yellowstone, Montana Water Quality Report
Water quality data for 5 water systems serving 10,263 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 70.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 700% | Above guideline |
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Compliance & Violations
Active Violations (2)
72
Oct 1, 2025
71
Jul 1, 2025
Resolved Violations (498)
34
Nov 15, 2025
34
Nov 15, 2025
34
Nov 15, 2025
03
Jul 1, 2025 — Sep 30, 2025
03
Jul 1, 2025 — Sep 30, 2025
+ 493 more resolved violations
Frequently Asked Questions
Is West Yellowstone tap water safe to drink?
West Yellowstone's water meets all EPA maximum contaminant levels. However, 1 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in West Yellowstone tap water?
1 contaminants have been detected in West Yellowstone's water supply across 5 water systems. See the full contaminant table above for details.
How can I improve my water quality in West Yellowstone?
Install a water filter rated for the specific contaminants found in West Yellowstone's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does West Yellowstone have any water quality violations?
Yes, West Yellowstone currently has 7 active violations. See the violations section above for details.