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 Quality Index to better inform people about the risks of PM2.5 exposure. Additionally, they’ll improve monitoring in communities hit hardest by air pollution to better protect their air quality.

Download the overview and implementation fact sheets to learn more.

It is unclear how this change will impact Nevada’s air quality regulations. In the future this change may mean more stringent regulations including an increase in air pollution control device requirements. When more information on this change comes the BEP team will be sure to keep local businesses informed.