City Water Quality Rankings in Colorado
186 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#145
Lasalle
County, CO
70 C
#146 Breckenridge
County, CO
68 C
#147 Monte Vista
County, CO
68 C
#148 Woodland
County, CO
68 C
#149 Towaoc
County, CO
67 C
#150 Yuma
County, CO
67 C
#151 Calhan
County, CO
66 C
#152 Poncha Springs
County, CO
66 C
#153 Del Norte
County, CO
65 C
#154 Dolores
County, CO
65 C
#155 Julesburg
County, CO
63 C
#156 Snowmass Village
County, CO
63 C
#157 Nederland
County, CO
62 C
#158 Cedaredge
County, CO
59 D
#159 Austin
County, CO
56 D
#160 Mancos
County, CO
56 D
#161 Pueblo West
County, CO
56 D
#162 Frisco
County, CO
55 D
#163 Central City
County, CO
49 D
#164 Strasburg
County, CO
49 D
#165 Winter Park
County, CO
49 D
#166 Norwood
County, CO
48 D
#167 Estes Park
County, CO
47 D
#168 Steamboat Springs
County, CO
47 D
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.