On November 16, 2012, the District Department of the Environment finalized rules to amend the New Source Review (NSR) program. The NSR program is a permit program created to help achieve and maintain compliance with the National Ambient Air Quality Standards (NAAQS) set by the United States Environmental Protection Agency (EPA). The proposed regulations were published in the D.C. Register on February 17, 2012, at 59 DCR 001217. The comment period officially closed on March 19, 2012, with the Department having received comments from four (4) members of the regulated community, JBG Companies (JBG), the U.S. Department of Defense (DOD), the U.S. General Services Administration (GSA), and the D.C. Water and Sewer Authority (DC Water). The Notice of Final Rulemaking, along with the comments received and the Department’s comment response document are below.