Air Plan Approval and Air Quality Designation; New Hampshire; Redesignation of the Central New Hampshire Sulfur Dioxide Nonattainment Area

摘要

The Environmental Protection Agency (EPA) is redesignating the Central New Hampshire nonattainment area from nonattainment to attainment for the 2010 1-hour primary sulfur dioxide (SO 2 ) national ambient air quality standard (NAAQS). EPA is also approving the maintenance plan submitted by the State of New Hampshire for the area for the SO 2 NAAQS. This nonattainment area consists of portions of Hillsborough County, Merrimack County, and Rockingham County, New Hampshire. The primary emission source in the area is now subject to federally-enforceable emission control standards, and air quality in the area now meets the SO 2 NAAQS. This action is being taken under the Clean Air Act.