District of Columbia Air Quality by City
District of Columbia has 1 city with an air-quality page, from Washington (5,230,370 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 District of Columbia
| City | Typical AQI (county median, 2025) | Population |
|---|---|---|
| Washington | 45 Good | 5,230,370 |