Newtown Square, Pennsylvania — From 2018 through 2021, the Watershed Protection Program of Willistown Conservation Trust (WCT) conducted monthly monitoring at ten sample sites in three tributaries to the Delaware River in northeastern Chester County: the headwaters of Darby, Crum, and Ridley Creeks. Following 41 monitoring visits and over 7,500 different measurements, they found that the water quality is moderately impaired at all sample sites. The entirety of the Watershed Protection Team’s research has since been summarized in a 48-page “State of our Streams Report.”