The United States Environmental Protection Agency (USEPA) requires Michigan to attain the National Ambient Air Quality Standards (NAAQS) for six criteria pollutants. The data contained in this layer file outlines the statewide nonattainment areas for the 2010 Primary Sulfur Dioxide NAAQS as designated by the USEPA. There are two partial nonattainment areas currently for this standard located in Southeast Michigan; one within St. Clair county and the other within Wayne county along the Detroit River. Further information about the six criteria pollutant NAAQS, including sulfur dioxide can be found on EGLE Air Quality Division's SIP and Attainment webpage.
Michigan Dept. of Environment, Great Lakes, and Energy