Pennsylvania’s 84,000 miles of rivers and streams, along with our lakes, wetlands and aquifers provide more than our drinking supply and recreation: they are our economy, our heritage and our future. For over a century, we treated them with disdain, without regard to the impacts on human health or the ecology. Nearly 15,000 miles of stream in Pennsylvania are not drinkable, fishable or swimmable – 34 times the length of the Susquehanna River and 46 times the length of the Allegheny. PEC has focused its expertise and experience into the Center of Excellence for Water Resources, which addresses abandoned mine drainage, stormwater management and a program for trading credits for removing excess nutrients and sediment from streams.