1.8cigarette-mass units a day
at AQI 155Canadian wildfire smoke · July 2026Smoke from hundreds of Canadian wildfires pushed air quality past AQI 150 across the Midwest and Northeast.Wildfire smoke contains fine particulate matter. At AQI 155, this example produces a rough PM2.5-mass comparison of 1.8 cigarette-sized units per day. It is not a health-risk equivalence or a chemical comparison.Sources: EPA AQI breakpoints · Berkeley Earth methodology · CIFFC, mid-July 2026Explore the PM2.5 comparison →
at AQI 155Canadian wildfire smoke · July 2026Smoke from hundreds of Canadian wildfires pushed air quality past AQI 150 across the Midwest and Northeast.Wildfire smoke contains fine particulate matter. At AQI 155, this example produces a rough PM2.5-mass comparison of 1.8 cigarette-sized units per day. It is not a health-risk equivalence or a chemical comparison.Sources: EPA AQI breakpoints · Berkeley Earth methodology · CIFFC, mid-July 2026Explore the PM2.5 comparison →