Tag: NNSR

By Timothy P. Fagan, BLR Air Expert tfagan@blr.com National Ambient Air Quality Standards (NAAQS) The CAA required EPA to develop NAAQS for six pollutants commonly found throughout the United States.  These pollutants, referred to as “criteria pollutants,” are: Sulfur dioxide; Particulate matter (PM-10 and PM-2.5); Carbon monoxide; Ozone; Nitrogen dioxide; and Lead. For each criteria […]