#13 of 51A
Colorado Water Quality
Colorado ranks #13 out of 51 states for tap water quality with a score of 86.7 out of 100.
Summary
Overall Score
86.7
out of 100
Cities Tested
156
cities
Cities w/ Violations
156
100% of cities
Avg Contaminants
6.3
above guidelines
Population
57.2M
people affected
Best Cities in Colorado
Pop: 1,321,071Score: 100
Pop: 1,445,495Score: 100
Pop: 1,352,071Score: 100
Pop: 1,296,478Score: 100
Pop: 1,356,300Score: 100
Cities Needing Improvement
Pop: 11,500Score: 70
Pop: 67,544Score: 70
Pop: 47,544Score: 70
Pop: 15,465Score: 70
Pop: 70,414Score: 70
Cities listed have the lowest water quality scores in Colorado.
Get Colorado Water Updates
We analyze new EPA data as it drops. Get the breakdown for Colorado in your inbox.
Free forever. Unsubscribe anytime. We never share your email.
Frequently Asked Questions About Colorado Water Quality
Colorado ranks #13 out of 51 states and territories for water quality with a score of 86.7 out of 100 and a grade of A. A total of 156 cities were tested across the state.
Need contact data for Colorado utilities?
Check 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.