For Potomac Riverkeeper Brent Walls, "being a riverkeeper is not just a job it's a way of life." All life in the Potomac is threatened by the discharge from the New Page paper mill in Westernport, Maryland. Every day, the Upper Potomac River Commission treatment plant discharges 21 million gallons of treated wastewater from the paper mill and sewage from the nearby towns which create a significant problem in the river. Fishing guide and retired fisheries biologist Ken Pavol says "when anglers see the effluent they wonder how in a modern day and age there can still be pollution like that?" The Maryland Department of the Environment has issued a permit to the treatment plant enabling them to exceed normal pollution limits as defined by the Clean Water Act. By invoking a special clause the river serves as a thermal mixing zone. "The public must become involved if change is to be made in the effluent," says Ken Pavol.