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.)

• NPDES Construction Permit List  updated 8/21/2021 at 1:10 pm
  Permit records are available in the Construction Stormwater COCs folder of the Laserfiche repository.                   
• NPDES Industrial Active Permit List  updated 9/1/2021 (reflects status as of Aug 31)    
  Permit records are available in the General Permits and Individual Permits folders of the Laserfiche repository.
• Post-Construction Active Permit List  updated 9/1/2021 (reflects status as of Aug 31)              
  Some of the permit records (about 20%) are available in the SW Permits folder of the Laserfiche repository.  The planned completion date for scanning Post-Construction permit files is Dec 2022.

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.

• Information About Map Results
• Map Updates and Corrections 

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