Data News Item: Days Exceeding NAAQ Standards for Fine Particulate Matter (Data Update)

In Data News, 2026-10-07

This layer displays the percentage of days (in a single year) with the concetration of fine particulate matter (fine particles 2.5 micrometers or less) above the National Ambient Air Quality Standard (NAAQS) of 35.0 micrograms per cubic meter.

View in Map Room