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City of Philadelphia Storm Drain Marking Program

Keep It Clean! Help protect our city's waterways from pollution by placing storm drain markers in your neighborhood.  

Make your mark on Philadelphia!

Rain Garden

1. Leave a Mark! 

There are approximately 75,000 inlets in Philadelphia. Learn more about how they work and. more importantly, where they drain to! 

2. Organize an Event in Your Community

Learn more about the program and how you can host a volunteer event for your community or organization. 

3. Prepare For Your Marking Event 

Now that you've signed up, let us help you prepare for the big day.  

4. Installation: Learn the Basics 

Click the link to learn more about the ins and outs of placing your markers.


Delaware Direct Watershed  Pennypack Watershed
 Schuylkill Watershed  Tookany/Tacony-Frankford Watershed
Wissahickon Watershed
Cobbs Creek Watershed Poquessing Creek Watershed

Discover your watershed!

Philadelphia's new storm drain markers celebrate our city's seven diverse watersheds. The watershed markers seen above feature the following wildlife:

Keep an eye out for storm drain markers across the city to see which watershed you live in. Want to learn more about Philadelphia's watersheds? Click Here

Philadelphia Water is proud to partner with the Partnership for the Delaware Estuary on this important program to protect our waterways.