The following is a list of the 10 facilities within the Pittsburgh Metropolitan Statistical Area that released the greatest volume of toxic chemicals into the air in 2014 and 2015 as reported by the EPA Toxic Release Inventory. The rankings are based on 2015 data for total air toxics emissions.
The facilities range from power plants and steel mills to chemical manufacturers and a brick factory. Each is required to report the volume of chemicals it releases each year to the Toxic Release Inventory. Those volumes vary widely — from more than 1.1 million pounds to just over 61,000 pounds in 2015. The plants that emit them are found in five of the seven Pittsburgh MSA counties.