Municipal Separate Storm Sewer Systems (MS4s): The NPDES MS4 permit requires, municipalities to develop and implement a comprehensive Stormwater Management Program (SWMP) that must include pollution prevention measures, treatment or removal techniques, monitoring, use of legal authority, and other appropriate measures to control the quality of stormwater discharged through infiltration or to the storm drains and thence to waters of the United States: that is groundwater, brooks, streams and Rivers .

Land Disturbance Stormwater Management Permit Application