For the first time in a decade, the Potomac River’s health grade, issued by the Potomac Conservancy, has declined to a B-. “It’s a far cry from when we graded the river an abysmal D just ten years ago, but stalled progress could signal a dangerous reversal in course for the river’s health if threats aren’t addressed,” according to the Conservancy. See www.potomacreportcard.com for ways to learn more and to get involved.