Donate to Hurricane Recovery

Stormwater Maps & GIS Resources

Stormwater Permitting Interactive Map 

The Division maintains an interactive web-based map to help the public determine whether development activities are subject to the post-construction stormwater permitting program or other stormwater permitting requirements. Please read the information below about using the results of this map viewer. 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.

Information About Map Results 

Guidance on Overlapping Programs

Map Updates and Corrections 

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

Active Stormwater Permits Map

Stormwater Programs Map

EPA: New Urbanized Areas