will guide the future of EPA's issuance of designations for which areas are attaining the 2010 sulfur dioxide (S02) air standard, with one court agreeing to hear a suit over four existing designations while a separate circuit court has approved EPA's timetable for issuing other designations....
EPA. 2016. "Table of Historical Ozone National Ambient Air Quality Standards (NAAQS)." EPA. Environmental Protection Agency. Web.U.S. EPA, 2016a. Table of Historical Ozone National Ambient Air Quality Standards (NAAQS). Retrieved from https://www.epa.gov/ozone-pollution/table-historical-ozone...
USEPA., 2016. US National Ambient Air Quality Standards (NAAQS). https://www.epa.gov/criteria‑air‑pollutants/naaqs‑ tableUnite States Environmental Protection Agency (US EPA), 2015a. National Ambient Air Quality Standards (NAAQS). http://www.epa.gov/air/...