U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
(a) Regional Haze. The requirements of section 169A of the Clean Air Act are not met because the regional haze plan submitted by Pennsylvania on December 20, 2010, 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
(b) Measures Addressing Limited Disapproval Associated With NO
(c) Measures Addressing Limited Disapproval Associated With SO