Since William Penn began constructing Philadelphia in 1682, the region’s landscape has been changed dramatically; hundreds of miles of the city’s surface streams have been channeled underground to ...

Philadelphia can't rebuild its colonial sewer system, and another option—building a tunnel to store excess sewage, which is what Chicago, San Francisco, and Washington, D.C. are doing to beat ...

A new storm water basin in Northeast Philadelphia will reduce runoff into the city's sewer system. (StateImpact Pennsylvania) Philadelphia’s long-running efforts to control its stormwater flows took a ...