Population average PM2.5 concentrations on the worst wildfire smoke days in the United States from January 2006 to June 2023
(in micrograms per cubic meter)
Characteristic
Population average PM2.5 from smoke in μg/m³
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The worst wildfire smoke day in the United States in recent years was June 7, 2023. On this day, the average American was exposed to **** micrograms per cubic meter (μg/m³) of fine particulate matter (PM2.5) carried within the plumes of smoke. This was mainly due to large forest fires in Canada that spread south into the U.S.
PM2.5 is a fine air pollutant that can be inhaled deep into the lungs and bloodstream, causing a range of health effects, including asthma and heart disease.Â
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Stanford University, & The Guardian. (June 8, 2023). Population average PM2.5 concentrations on the worst wildfire smoke days in the United States from January 2006 to June 2023 (in micrograms per cubic meter) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 21, 2026, from /statistics/1445753/pm25-wildfire-smoke-days-in-the-us/
Stanford University, und The Guardian. "Population average PM2.5 concentrations on the worst wildfire smoke days in the United States from January 2006 to June 2023 (in micrograms per cubic meter)." Chart. June 8, 2023. ÌÇÐÄÆƽâ°æ. Accessed July 21, 2026. /statistics/1445753/pm25-wildfire-smoke-days-in-the-us/
Stanford University, The Guardian. (2023). Population average PM2.5 concentrations on the worst wildfire smoke days in the United States from January 2006 to June 2023 (in micrograms per cubic meter). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 21, 2026. /statistics/1445753/pm25-wildfire-smoke-days-in-the-us/
Stanford University, and The Guardian. "Population Average Pm2.5 Concentrations on The Worst Wildfire Smoke Days in The United States from January 2006 to June 2023 (in Micrograms per Cubic Meter)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 8 Jun 2023, /statistics/1445753/pm25-wildfire-smoke-days-in-the-us/
Stanford University & The Guardian, Population average PM2.5 concentrations on the worst wildfire smoke days in the United States from January 2006 to June 2023 (in micrograms per cubic meter) ÌÇÐÄÆƽâ°æ, /statistics/1445753/pm25-wildfire-smoke-days-in-the-us/ (last visited July 21, 2026)
Population average PM2.5 concentrations on the worst wildfire smoke days in the United States from January 2006 to June 2023 (in micrograms per cubic meter) [Graph], Stanford University, & The Guardian, June 8, 2023. [Online]. Available: /statistics/1445753/pm25-wildfire-smoke-days-in-the-us/
