Idaho Water Quality
Idaho ranks #47 out of 51 states for tap water quality with a score of 80.7 out of 100.
Based on 109 scored cities covering 96.8% of the state's served population.
Summary
Best Cities in Idaho
Cities Needing Improvement
Cities listed have the lowest water quality scores in Idaho.
Get Idaho Water Updates
We analyze new EPA data as it drops. Get the breakdown for Idaho in your inbox.
Free forever. Unsubscribe anytime. We never share your email.
Frequently Asked Questions About Idaho Water Quality
Idaho ranks #47 out of 51 states and territories for water quality with a score of 80.7 out of 100 and a grade of A. A total of 109 cities were tested across the state.
Curious how your own water compares to Idaho's ranking?
Upload your water test (PDF or a photo) and we'll email you a plain-English reading of each result — free. Educational only, no medical claims.
Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.
Upload my testCheck Your City's Water Quality
See detailed water quality data and get personalized filter recommendations for your specific location.
Stay Informed About Your Water Quality
Get EPA reports, filter recommendations, and safety alerts for your area.
Join 10,000+ people protecting their families. Unsubscribe anytime.