City Water Quality Rankings in Colorado
186 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#73
Severance
County, CO
91 A
#74 Englewood
County, CO
90 A
#75 Hudson
County, CO
90 A
#76 Lamar
County, CO
90 A
#77 Monument
County, CO
90 A
#78 Parker
County, CO
90 A
#79 Pueblo
County, CO
90 A
#80 Springfield
County, CO
90 A
#81 Vail
County, CO
90 A
#82 Brighton
County, CO
89 B
#83 Buena Vista
County, CO
89 B
#84 Colorado Springs
County, CO
89 B
#85 Craig
County, CO
89 B
#86 Fort Morgan
County, CO
89 B
#87 Georgetown
County, CO
89 B
#88 Hillrose
County, CO
89 B
#89 Silt
County, CO
89 B
#90 Superior
County, CO
89 B
#91 Alamosa
County, CO
88 B
#92 Cortez
County, CO
88 B
#93 Dacono
County, CO
88 B
#94 Dillon
County, CO
88 B
#95 Fort Collins
County, CO
88 B
#96 Fountain
County, CO
88 B
Frequently Asked Questions
How are city water quality rankings calculated in Colorado?
WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.
Can I compare two cities in Colorado?
Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.
How often does WaterQ refresh city data?
City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.