Days Exceeding NAAQ Standards for Ozone

This layer displays the percentage of days (in a single year) with the maximum 8-hour average ozone concetration above the National Ambient Air Quality Standard (NAAQS) of 0.070 parts per million.

Days Exceeding NAAQ Standards for Fine Particulate Matter

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.

Gross Domestic Product by County, 2024

New map and data from the Bureau of Economic Analysis display information about Gross domestic product (Real GDP by county and metropolitan area is an inflation-adjusted measure of each area’s gross product that is based on national prices for the … Continued