waterbycounty

Colorado Water Quality

Drinking water data for all 64 counties.

Avg Water Score

98.7

State Grade

A

Counties with Data

64

of 64 total

All Colorado Counties

CountyWater Score
Adams County100.0
Arapahoe County100.0
Boulder County100.0
Broomfield County100.0
Cheyenne County100.0
Crowley County100.0
Custer County100.0
Denver County100.0
Gilpin County100.0
Hinsdale County100.0
Jackson County100.0
Lake County100.0
Mesa County100.0
Mineral County100.0
Montezuma County100.0
San Juan County100.0
Weld County100.0
Douglas County99.9
Eagle County99.9
El Paso County99.9
Grand County99.9
Jefferson County99.9
Larimer County99.9
Las Animas County99.9
Moffat County99.9
Pitkin County99.9
Summit County99.9
Yuma County99.9
Archuleta County99.8
Chaffee County99.8
Elbert County99.8
Fremont County99.8
Kit Carson County99.8
La Plata County99.8
Lincoln County99.8
Saguache County99.8
Gunnison County99.6
Logan County99.6
Montrose County99.6
Rio Blanco County99.6
Rio Grande County99.6
Pueblo County99.5
Morgan County99.4
Phillips County99.4
Washington County99.4
Conejos County99.3
Routt County99.3
Garfield County99.2
Sedgwick County99.2
Costilla County99.0
San Miguel County98.6
Clear Creek County98.5
Delta County98.5
Ouray County98.1
Alamosa County97.8
Park County97.8
Teller County97.2
Dolores County96.8
Huerfano County96.4
Kiowa County95.7
Bent County93.6
Baca County90.3
Prowers County86.3
Otero County79.8

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Data Source

Water quality data sourced from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. Scores reflect compliance history and health-based violation counts.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

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