MANCHESTER, N.H., February 29, 2012 – Public Service of New Hampshire (PSNH), joined by energy companies and trade associations from around the country, has filed its response to the U.S. Environmental Protection Agency's (EPA) reissuance of a permit for the company's Merrimack Station power plant in Bow, NH. The EPA issued a Draft National Pollutant Discharge Elimination System (NPDES) Permit for the facility on September 30, 2011, more than fourteen years after PSNH filed for a renewal of its existing permit.