Maps & Permit Data

Active Stormwater Permits Map  






This interactive map indicates the locations of current stormwater permitees:

  • Yellow dots indicate NPDES Industrial General Permits.
  • Orange dots indicate NPDES Industrial Individual Permits.
  • Blue stars indicate NPDES MS4 Permits.
  • Purple dots indicate NPDES No Exposure Certifications.
  • Green dots indicate Post-Construction Permits.
  • Construction Stormwater Permits are not on this map.

How to Find Permit Data

The following are provided for informational purposes only and are updated periodically.  Check the permit folder for current information on a project (modifications, rescissions, etc.)

Post-Construction Stormwater Map 






This viewer is only a tool to help in making final determinations about your responsibilities for permit coverage. Please read the information below about using the results of this map viewer.

Please note that if that there are a number of areas currently indicated as "No Program Required" that are subject to special watershed strategies that require stormwater permit coverage.  You can read about this at the Special Designations Descriptions web page.

For assistance with the interactive map, please contact Bethany Georgoulias.

Reference Maps for Determining Permitting Requirements

Impaired Waters & TMDL Map

Waterbody Classification Map

Watershed Drainage Area Map

    HQW, ORW and WS Reclassifications

    There may be waterbodies that have either recently been reclassified as High Quality Waters, Outstanding Resource Waters or Water Supply Watershed, or are pending reclassification. These areas are not reflected in the current interactive map, but they may now be subject to local or state stormwater program requirements. Be sure to check with the Classification and Standards Unit website for the most recent information.

    Post-Construction Stormwater Information

    Phase II Entity Designations and Updates

    Phase II Tipped Counties Map

    Phase II Areas Map

    Delegated Authorities

    Map of Special Watersheds in Mecklenburg and Union Counties

    Stormwater GIS Data and Maps

    SW Permitting Reference GIS Layer for Map Viewer

    ERRATA Sheet  (SW Permitting Reference GIS)

    Phase II Areas in North Carolina
    This layer includes newer urbanized areas from the 2010 US Census and more recent jurisdictional boundaries. This layer does not include MSIs that were delineated by in 2010 ("future MSIs"), which may not yet be in effect. 

    Additional Map Resources

    Stormwater Programs Map

    EPA: New Urbanized Areas