Montana Water Quality
Check tap water quality for any ZIP code in Montana. See contaminants, violations, and health risks for your water system.
Enter a Montana ZIP code to get your free water quality report.
Water Quality in Montana
Key factors and concerns
Montana generally has good water quality from mountain sources, but legacy mining contamination, particularly from Superfund sites like Butte, affects some communities. Agricultural runoff and naturally occurring arsenic are also concerns in certain areas.
What's in your Montana water report
Contaminant levels
Every detected contaminant in your Montana water system, compared to EPA limits and health guidelines.
Violation history
All EPA violations on record for water systems in Montana, including health-based and monitoring violations.
Water quality grade
An A through F grade based on violation history, contaminant levels, and health guideline comparisons.
Filter recommendations
Which type of water filter will actually remove the contaminants found in your specific water system.
Check your Montana water now
Enter your ZIP code for a free water quality report specific to your water system in Montana.
Looking for another state? Browse all states