In April 2003, the United States Environmental Protection Agency (USEPA) issued a National Pollutant Discharge Elimination System (NPDES) General Permit for Stormwater Discharges from Small Municipal Separate Storm Sewer Systems (MS4s). A total of 45 New Hampshire communities (six fully regulated and 39 partially regulated) became subject to Stormwater Phase II regulations based on their designation as Urbanized Areas according to the 2000 US Census.
New Hampshire Estuaries Project
Rabasca, Kristie and Rinehart, Christine, "Guidelines and Standard Operating Procedures for IDDE and Pollution Prevention/Good Housekeeping" (2006). PREP Reports & Publications. 152.