Wildfire smoke at U.S. schools surges eightfold; indoor air often fails to protect children
A national study finds smoke exposure at schools and childcare centers has climbed sharply since 2006, with some classrooms dirtier than outdoors.
What to know
- Wildfire smoke days at U.S. public schools increased nearly eightfold between 2006 and 2023 (6.8 to 54.4 days annually); childcare centers saw a twelvefold rise.
- Indoor air at schools does not reliably protect children—some buildings recorded higher PM2.5 concentrations indoors than outdoors during smoke events.
- In 2023 alone, children collectively experienced 2.64 billion student-smoke-days at public schools, with the sharpest acceleration occurring after 2019.
- Fine particulate matter from wildfires can travel hundreds to thousands of miles and is linked to respiratory illness, cardiovascular disease, and reduced cognitive performance in children.
Molly Kile Environmental epidemiologist, Oregon State University College of HealthStephanie Foster Study lead, Oregon State University College of Health
How it unfolded 3 developments, newest first · click a bar or a number to jump articlespostscomments
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Study data shows 2.64 billion student-smoke-days in 2023 alone; sharpest rise since 2019
When researchers multiplied school enrollment by smoke days, the 2022-2023 school year totaled 2.64 billion student-smoke-days at public schools and 1.02 billion at childcare centers. The sharpest increase occurred between the 2019-2020 and 2022-2023 school years, when average school smoke days jumped from about 10 to 54.
“Our children are collectively experiencing billions of days of smoky air each year.”
— Molly Kile -
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Wildfire smoke is reaching schools more often, and researchers found indoor air is not always safer for children.
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Wildfire smoke is invading America’s schools, and staying indoors may not be enough https://www. earth.com/environment/wildfire -smoke-is-invading-americas-schools-and-staying-indoors-may-not-be-enough/ # America # environment # wildfire # wildfires # schools # health # PublicHealth
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Study finds indoor air at schools does not reliably protect children from smoke
Researchers discovered substantial variation in how well school buildings protected occupants from outdoor particulate pollution, with some schools recording higher indoor PM2.5 concentrations than nearby outdoor measurements during smoke days. The study emphasized the need for HVAC upgrades or portable HEPA filters.
“Some schools had higher indoor PM2.5 concentrations than nearby outdoor measurements during smoke days.”
— Molly Kile -
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Oregon State study reveals schools' exposure to wildfire smoke has surged sharply
A national study examining air quality data from 2006 to 2023 found the average number of annual smoke days at public schools rose from 6.8 to 54.4 between the study period's beginning and end. Childcare centers experienced an even steeper increase, from 9.4 to 112.2 days.
“The average number of annual smoke days at public schools rose from 6.8 to 54.4 between the beginning and end of the study period.”
— Molly Kile -
first by Phys.org, 10d ago
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