Boathouses

Flags

In accordance with the MA Dept. of Public Health (DPH), a cyanobacteria (blue-green algae) advisory has been posted for the Charles River Lower Basin downstream of Massachusetts Ave Bridge (a.k.a. the Harvard Bridge), with signage posted at all public access points warning against any contact with the water. Red flags are being flown at Charles River Boathouse, Union Boat Club, Paddle Boston at Kendall Square, and Charles Gate Yacht Club. Public health officials recommend that people and pets avoid contact with areas of algae concentration and, if contact occurs, rinse thoroughly.

CRWA’s water quality models are predicting blue flags at all boathouses, based only on E. coli bacteria predictions.

Blue flag for Community Rowing, Inc.
Community Rowing, Inc.
Blue flag for Newton Yacht Club
Newton Yacht Club
Blue flag for Northeastern's Henderson Boathouse
Northeastern's Henderson Boathouse
Blue flag for Paddle Boston at Herter Park
Paddle Boston at Herter Park
Blue flag for Watertown Yacht Club
Watertown Yacht Club
Blue flag for Cambridge Boat Club
Cambridge Boat Club
Blue flag for Harvard's Weld Boathouse
Harvard's Weld Boathouse
Blue flag for Boston University DeWolfe Boathouse
Boston University DeWolfe Boathouse
Blue flag for Riverside Boat Club
Riverside Boat Club
Red flag for Charlesgate Yacht Club
Charlesgate Yacht Club
Red flag for Charles River Yacht Club
Charles River Yacht Club
Red flag for Paddle Boston at Kendall Square
Paddle Boston at Kendall Square
Red flag for Union Boat Club
Union Boat Club

Map

Below is a map showing the Charles River boathouses with their current flag statuses. Clicking on a flag will show the name of the boathouse.

( Last updated: August 26, 2026 at 11:00 PM )