"The Environmental Protection Agency proposed tough pollution caps for the Chesapeake Bay Thursday, requiring Maryland and other mid-Atlantic states to do more to clean up the troubled estuary than previously thought necessary.
The pollution limits proposed by the EPA would force the six states and the District of Columbia to roughly double the pace at which they've been removing nitrogen, one of the two nutrients fouling the bay. Maryland, for instance, would have to curtail nitrogen by 15 percent over the next seven years — a regimen likely to require costly upgrades to sewage treatment plants, expensive retrofits of storm drains in urban and suburban areas, and major new curbs on runoff of fertilizer and chicken manure from Eastern Shore farms.
EPA Regional Administrator Shawn M. Garvin said the draft pollution-reduction targets would not be easy for the states to achieve. But they represent federal scientists' best estimates of what's needed to restore fish-sustaining oxygen to the waters of North America's largest estuary. Dead zones form every summer in the Chesapeake from algae blooms that are fed by sewage plants, farm and urban and suburban runoff and air pollution."