Learn about the watersheds you live, work, and play in.
What is a Watershed?
A watershed is any area of land where water from rain or snow drains into a body of water, such as a stream, creek, river, lake, or ocean.
Philadelphia is part of the Delaware River Watershed. Its seven main subwatersheds are the Delaware Direct, Schuylkill, Pennypack, Tookany/Tacony-Frankford, Darby-Cobbs, Poquessing, and Wissahickon.
The Philadelphia Water Department is committed to protecting and restoring our area’s watersheds to ensure a healthy environment and a clean supply of drinking water.
Philadelphia Watershed History
Learn how Philadelphia’s rapid growth as an industrial hub informed development patterns and altered the natural hydrology and topography of the city’s watersheds.
Improving Our Watersheds
What we’re doing
PWD is committed to keeping our watersheds clean and healthy through initiatives like:
- Watershed Protection
- Green City, Clean Waters
- Watershed Plans & Reports
What you can do
Find out what you can do as a homeowner, community group, business, or institution to improve your watershed.