Wildfire Smoke Is Testing Ohio’s Air Quality — Here’s What It Means Indoors

Orange sunset over misty mountains with silhouettes of bare, dead trees in the foreground.

How does Canadian wildfire smoke affect indoor air quality in Ohio? Canadian wildfire smoke raises fine particulate matter (PM2.5) that infiltrates buildings through HVAC intake, doors, and windows. Ohio EPA issued a statewide Air Quality Advisory on July 15, 2026, warning the Air Quality Index could reach the Unhealthy range statewide. That advisory covers outdoor […]