Potomac’s water quality drops to a ‘D,’ monitoring group says

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The Potomac River’s dirty reputation is apparently getting worse. The nonprofit that monitors the river’s health on Thursday downgraded the waterway from its D-plus ranking in 2007 to a D.

The Potomac Conservancy’s “State of the Nation’s River” report says the river faces pollution from both ends, with forest loss upstream and industrial development downstream.

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