Tighter standards for PM2.5 could reduce mortality in the US. Photo: © ehrlif/ Shutterstock.com
US EPA new air quality policy assessment
The US EPA has published a draft policy assessment of the National Ambient Air Quality Standards (NAAQS) for particulate matter based on new information and analyses. It concludes that the available scientific evidence, air quality analyses, and the risk assessment allow for a revision of the current annual and 24-hour primary PM2.5 standards for the adequacy of public health protection. The risk assessment estimates that, compared to the current standards, potential alternative annual standards with levels from 11.0 down to 8.0 µg/m3 could significantly reduce PM2.5-associated mortality broadly across the United States.
US EPA Policy Assessment for the Reconsideration of the National Ambient Air Quality Standards for Particulate Matter, External Review Draft can be read in full at https://www.epa.gov/system/files/documents/2021-10/draft-policy-assessme...