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Stormwater Program

The DEMLR Stormwater Program comprises many programs aimed at protecting water quality from stormwater impacts. This page provides recent updates and announcements and overviews of some of the different programs that are implemented.

Updates for February 2019

  • This web page now has a short alias,  The Construction SW web site also has a short alias,
  • The General Permit for Construction Activities that are subject to the NC Sedimentation Pollution Control Act (NCG01) is scheduled to be issued on April 1, 2019.  See the Construction SW web site for more details.
  • The Stormwater Program has created a Schedule for Renewing NPDES SW Permits that includes Individual Industrial, General Industrial and MS4 permittees.  This year, we will be renewing the yellow-shaded permits.
  • The Stormwater Program has moved from the 9th to the 6th floor of the Archdale Building.

NPDES Construction Stormwater Program

The NPDES Construction Stormwater Program regulates construction activities that disturb more than one acre under a general permit (NCG01000 or NCG25000). Permittees are required to develop and implement a Sedimentation and Erosion Control Plan, adhere to materials handling protocols, inspect their sites and maintain records. The DEMLR Stormwater and Sedimentation Programs partner to implement the program. Learn more here.

Post-construction Stormwater Program

The Post-construction Stormwater Program requires new developments in subject areas of the state to install and maintain permanent stormwater management measures after the project is built. The Stormwater Design Manual is a technical guidance document about implementing the rules pertaining to post-construction stormwater.  The companion to the manual is the Stormwater Control Measure Credit Document, which includes the state’s estimation of each SCM’s effectiveness in protecting hydrology and removing pollutants. Learn more here.

NPDES Industrial Program

The NPDES Industrial Program covers approximately 4,130 facilities (3100 under general permits, 150 under individual permits, and 880 facilities under no exposure certifications).  Industrial activities are required to manage and monitor their facilities for potential sources of stormwater pollution.  Learn more here.

NPDES MS4 Program

The NPDES MS4 Program covers 122 entities within urbanizing areas, such as municipalities, counties and universities. Other MS4 permittees include military bases and NCDOT.  MS4 entities implement measures within their jurisdictions to prevent and control stormwater pollution from developed areas. Learn more here.

Water Supply Watershed Program

The Water Supply Watershed Program covers 285 local governments that have land use jurisdiction in one of the state's 228 water supply watersheds. Learn more here.


NC Stormwater Program 2018: Achievements and Aspirations by Annette Lucas