National Ambient Air Quality Standards Change for Fine Particulate Matter (PM2.5)
On February 7, 2024, the Environmental Protection Agency (EPA) announced a final rule which makes changes to the national air quality health standard for fine particulate matter (PM2.5). By setting a stricter standard for the amount of PM2.5 allowed in the air at 9.0 micrograms per cubic meter, the EPA aims to improve public health based on the latest scientific evidence. However, some standards, like those for PM2.5 over a 24-hour period and PM10, remain the same. The EPA also plans to update the Air …
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