What is a watershed?
A watershed is an area of land that channels rainfall and snowmelt to a common body of water, such as creeks, streams, and rivers. The Wissahickon watershed is 64 square miles and covers portions of Montgomery and Philadelphia counties. It is defined by the land-area where rainfall and snowmelt flows into the Wissahickon Creek and its tributaries.
Through the Stream Monitoring and Assessment Program, our staff conduct year-round surveys to monitor the water chemistry, habitat and insect communities in the Wissahickon Creek. This allows us to identify problem areas in the watershed, see trends in water quality, and understand whether our projects are working.
The Creek Watch program trains community members to monitor streams across the watershed. These critical volunteers are our eyes and ears, and have been instrumental in updating staff on stream conditions, and catching and reporting several pollution incidents.