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New Hampshire Department of Environmental Services

Multi-Sector General Permit (MSGP) Industrial Facilities

Industrial DischargeActivities that take place at industrial facilities, such as material handling and storage, are often exposed to storm water. The runoff from these activities discharges pollutants into nearby storm sewer systems and water bodies. Phase I of the National Pollutant Discharge Elimination System (NPDES) Storm Water Program regulates runoff from eleven categories of industrial activity (see list below). The Phase II rule does not add any new categories of industrial activity, but it does do two new things:

  1. Municipally-owned industrial activities that had been temporarily exempted under Phase I are no longer exempt. This means that municipally-owned and state-owned highway garages that do vehicle maintenance, transfer stations that do recycling, landfills that have ever received industrial waste, and wastewater treatment plants with a design flow of one million gallons per day or greater need a NPDES permit.
  2. Phase II also includes a revised "no exposure" exclusion for regulated categories of industrial activities if the facility operator can certify that storm water runoff is not exposed to industrial activities.

NHDES Contact

Jeff Andrews
(603) 271-2984

EPA Contact

David J Gray
(617) 918-1577

NH Department of Environmental Services | 29 Hazen Drive | PO Box 95 | Concord, NH 03302-0095
(603) 271-3503 | TDD Access: Relay NH 1-800-735-2964 | Hours: M-F, 8am-4pm

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