waterbycounty

Idaho Water Quality

Drinking water data for all 44 counties.

Avg Water Score

99.1

State Grade

A

Counties with Data

44

of 44 total

All Idaho Counties

CountyWater Score
Ada County100.0
Adams County100.0
Custer County100.0
Nez Perce County100.0
Oneida County100.0
Shoshone County100.0
Washington County100.0
Bannock County99.9
Bear Lake County99.9
Bonneville County99.9
Gem County99.9
Jerome County99.9
Minidoka County99.9
Twin Falls County99.9
Caribou County99.8
Gooding County99.8
Kootenai County99.8
Lincoln County99.8
Teton County99.8
Canyon County99.7
Benewah County99.6
Bingham County99.6
Bonner County99.4
Owyhee County99.4
Blaine County99.3
Butte County99.3
Jefferson County99.3
Madison County99.3
Latah County99.2
Payette County99.2
Cassia County99.1
Clearwater County99.1
Elmore County99.1
Camas County99.0
Power County98.8
Lemhi County98.3
Lewis County98.3
Clark County98.2
Franklin County98.0
Valley County97.3
Boise County97.1
Idaho County95.2
Fremont County94.7
Boundary County94.4

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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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