Science ❯ Environmental Science ❯ Air Pollution ❯ Particulate Matter

PM2.5

Midwest Remains Under Air Quality Alerts as Canadian Wildfire Smoke Lingers

Unhealthy fine particulate concentrations driven by Canadian wildfire smoke persist across the Midwest with improvement forecast over the weekend.

Canadian Wildfires Force 30,000 to Evacuate and Spread Smoke Across Third of U.S.