Wingohocking Creek
It is part of the Delaware watershed running northwest to southeast where it joins with the Frankford and Tacony creeks before flowing into the Delaware River. It was buried at the beginning of the 20th century and is currently part of the Philadelphia sewer system. This creek is important to the geography, history, and ecology of the Philadelphia area and should not be ignored and forgotten. A
08/06/2025
We’re back again with Watershed Wednesdays! Today we’re talking about sewage, specifically Combined Sewage Overflows (CSO). A combined sewer system is a setup where one pipe carries both dirty water from homes (like sinks, showers, and toilets!) and rainwater from the streets and is found in about 60% of Philly neighborhoods. When there is heavy rain, the sewers overflow, sending a mix of stormwater and raw sewage right into our Schuylkill and Delaware Rivers, instead of the treatment plant.
Each year, about 15 billion (yes, billion!) gallons of raw sewage and polluted water pour into Philly’s creeks and rivers, including the Schuylkill and Delaware. That’s enough to fill at least 22,000 Olympic-sized swimming pools! And the sewage doesn’t just disappear in the rivers. Sewage contaminates local waterways for at least 128 days or more per year! This can sometimes make it dangerous to swim, kayak, or fish—some river programs and recreation days get canceled because the water has too much sewage pollution.
Thankfully, Philadelphia has been working to reduce CSOs. Green City, Clean Waters is a 25-year program that was started in 2011 to reduce the volume of stormwater entering combined sewers and to expand stormwater treatment capacity with traditional infrastructure improvements. Green City, Clean Waters continues to make progress and even exceeded the 10-year pollution reduction goal, with new infrastructure investments keeping about 3 billion gallons of stormwater runoff and sewer overflow out of local waterways.
To learn more and stay up to date with CSO levels and the Green City, Clean Waters plan, visit https://water.phila.gov/green-city/. We’re all part of the solution! See you next week for our last day of more watershed wisdom!
Map: Penn Environment
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10/01/2025