Glenn Rider, director of the Bureau of Watershed Management at the Pennsylvania Department of Environmental Protection, noted his state has already imposed regulations targeting its storm-water runoff, which accounts for 6 percent of the bay's annual pollution load.
A 2006 study indicated it could cost the state $2 billion to make some of the improvements EPA is seeking.
said computer models indicate Pennsylvania is meeting its targets for nitrogen and sediment pollution but not for phosphorus, all of which affect water quality in the Chesapeake.
was waiting for details from the EPA
But "it would be difficult" to meet the agency's pollution targets over the next decade and a half, he