Potomac by Air: Our Nation's River is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet ...

Peak bloom occurs when 70% of the blossoms of the Yoshino cherry trees, the most common type along the Tidal Basin, are open. The National Park Service, which tracks the blooming of the trees each ...

This $615 million project is key to cleaning up the Potomac River ... treated before draining into the river. More than 800 other cities across the United States have similar sewer systems ...

the Potomac River, on average, is 27 feet deep and has an average flow rate of 10,000 cubic feet per second. The agency states on its website that swimming or wading in the river is illegal ...