The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of New Hampshire. This revision addresses the interstate transport requirements of the Clean Air Act (CAA), referred to as the good neighbor provision, with respect to the 2010 sulfur dioxide (SO<INF>2</INF>) national ambient air quality standard (NAAQS). This action approves New Hampshire's demonstration that the State is meeting its obligations regarding the transport of SO<INF>2</INF> emissions into other states.