Code of Federal Regulations Title 40. Protection of Environment § 40.52.1279 Visibility protection

(a) Regional Haze. The requirements of section 169A of the Clean Air Act are not met because the regional haze plan submitted by Mississippi on September 22, 2008, and supplemented on May 9, 2011, does not include fully approvable measures for meeting the requirements of 40 CFR 51.308(d)(3) and 51.308(e) with respect to emissions of NO_X and SO₂ from electric generating units. EPA has given limited disapproval to the plan provisions addressing these requirements.

(b) Disapproval. EPA has disapproved the portions of Mississippi's May 29, 2012, 2008 8–hour Ozone infrastructure SIP submission;  July 26, 2012, 2008 8–hour Ozone infrastructure SIP resubmission;  February 28, 2013, 2010, 1–hour NO₂ infrastructure SIP submission;  June 20, 2013, 2010 1–hour SO₂ infrastructure SIP submission;  and December 8, 2015, 2012, Annual PM_2.5 infrastructure SIP submission that address the visibility protection (prong 4) requirements of Clean Air Act section 110(a)(2)(D)(i)(II). EPA disapproved the prong 4 portions of these SIP submissions because Mississippi does not have a fully approved regional haze SIP that meets the requirements of 40 CFR 51.308 and because these SIP submissions do not otherwise demonstrate that emissions within the State do not interfere with other states' plans to protect visibility.