Stormwater Maps & GIS Resources

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.

Active Stormwater Permits List

The following are provided for informational purposes only and are updated periodically:

Construction NPDES Stormwater Permit List updated through 1/5/2021 at 9:35 am. Please note that all NCG01 project records may be accessed in this section of our Laserfiche Repository. It is important to check the permit folder for the most current information on any project (modifications, more recent rescission, etc.)
Active NPDES Stormwater Permit List updated 1/1/2021
Active State Stormwater Permit List updated 1/1/2021

Post-Construction Stormwater Map

This interactive map indicates whether development activities are subject to a post-construction stormwater program and, if so, which one. While we do our best to make the map as accurate as possible, 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:

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