The following spreadsheets provide air quality status and trends for counties and cities, defined as CBSAs (Core-Based Statistical AreasExit), with monitoring data.  These tables are based on data from EPA's AQS (Air Quality System) database as of May 10, 2016.  Annual summary statistics are also available on EPA's AirData website from the Air Quality Statistics Report. 

• Air Quality Statistics by County, 2015(1 pg, 125 K, 5/10/2016)
• Air Quality Statistics by City, 2015(1 pg, 59 K, 5/10/2016)
• Air Quality Trends by City, 2000-2015(1 pg, 162 K, 5/10/2016)
• Air Quality Trends by City, 1990-2015(1 pg, 157 K, 5/10/2016)