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Delaware Department of Transportation

Stormwater Management

Map Viewer

The NPDES Map Viewer v3.0 is the primary tool to view and query DelDOT's stormwater inventory, including structures, conveyances, stormwater management facilities (BMPs) and related data. The tool provides advanced query and reporting capabilities. Data is sourced from complex field inventory processes and is noneditable for the majority of users.


Access the Map Viewer

First time users must create a login. Also, first time users are encouraged to listen to the training videos. The trainings explain and demonstrate key points in the User Guide.

User Guides

Training Videos


Create Account



Change and Forgot Password



Webpage Layout



Table of Contents



Map Navigation and Select by Map



Geographic Filter



Advanced Query



Actions, Reports, and Attachments



Identify Tool



Address Locator



Measurement Tool and Draw Graphics



Export Map to PDF





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