The Environmental Protection Agency (EPA) is approving delegation of authority to the New Hampshire Department of Environmental Services (NHDES) for implementing and enforcing the Clean Air Act (CAA) Federal Plan Requirements for Municipal Solid Waste Landfills That Commenced Construction on or Before July 17, 2014, and Have Not Been Modified or Reconstructed Since July 17, 2014. This action amends regulatory text to promulgate the delegation of authority and is taken in accordance with the CAA.