Idaho Air Quality by City

Idaho has 14 cities with an air-quality page, from Boise (448,305 people) on down. Each page leads with the live AQI, the main pollutant driving it, and a go/no-go for outdoor exercise on the EPA scale.

Cities in Idaho

14 cities with an air-quality page, largest first

CityTypical AQI (county median, 2025)Population
Boise42 Good448,305
Nampa36 Good201,956
Coeur d'Alene31 Good131,592
Meridian42 Good130,138
Post Falls31 Good43,391
RexburgNo EPA monitor40,543
Rathdrum31 Good10,874
Malad CityNo EPA monitor2,601
AberdeenNo EPA monitor2,564
Avimor42 Good586
Crouch42 Good214
St. CharlesNo EPA monitor145
Conkling Park31 Good123
White Bird40 Good57

Our dataset lists 236 places in Idaho; the 14 above have a page. For a smaller town, the nearest city above is the closest match.