The Lackawanna River and its tributaries are in "good-to-excellent" condition in its upper reaches. The river deteriorates slightly as it approaches Scranton, but becomes considerably more degraded downriver of Scranton. A large number of mine seeps, outfalls, and boreholes occur within the watershed. The aquatic habitat in the last is nonexistent due to acid mine drainage from the Old Forge Borehole, which discharges 100 million gallons of acid mine drainage into the river every day. Another 40 million gallons of acid mine drainage per day come from the Duryea Outfall. Other impacts include combined sewer overflows and urban stormwater. The stormwater discharges begin to become more common as the river reaches the Mid Valley region, and their frequency rapidly increases in the Down Valley region. The lower have a yellow-orange color due to iron oxide contamination. There are a total of 158 combined sewer overflows on the river.