The EPA said the river was swimmable 55 percent of the time last year -- meaning 55 percent of the monthly samples met the appropriate safety standards.

BOSTON (AP) — A conservation group is warning the public to beware of a toxic blue-green algae found in the Charles River. The Charles River Watershed Association issued a public health advisory ...

Call it a Brave Save: While leaving a Celtics game with his father, a teenager from Swampscott was able to help save a man from sinking into the Charles River after hearing a call for help.https ...

Good news for the Charles River as Boston and Metrowest get ready for summer. The Charles River was given a "B" level grade from the U.S. Environmental Protection Agency regarding bacterial water ...

Meanwhile, he’s earned support from the Charles River Watershed Association, a conservation group that collects more than 50,000 pounds of litter from the river each year.

The Charles River Watershed Association said this is the first "major bloom" of cyanobacteria in the river in four years. Cyanobacteria is a blue-green algae that naturally occurs in fresh water.

A t dawn, fog rose from the surface of the Charles River. On that morning last autumn, songbirds darted over the water as I kayaked downstream through a wide channel lined by maples and oaks in ...

Swimmers, who can begin registering in May, will get 25-minute time slots to enjoy a section of the river near the state Department of Conservation and Recreation’s Fiedler Dock.