The Philadelphia Water Department (PWD) was first alerted of a chemical spill on a Delaware River tributary in Bristol Township, Bucks County, on Saturday, March 25, 2023. From March 25 through April 4, our water quality experts collected over 200 samples in response. No chemicals of concern from the Bristol Township spill were detected in any of the 200-plus samples collected by PWD and analyzed by independent, accredited laboratories, confirming that Philadelphia’s drinking water was not impacted by the chemical spill.