Flags
In accordance with the MA Dept. of Public Health (DPH), a cyanobacteria (blue-green algae) advisory has been posted in the Charles River downstream of Massachusetts Avenue (a.k.a. the Harvard Bridge). Red flags are being flown at the Charles River Yacht Club, Union Boat Club, Paddle Boston at Kendall Square, and the Charlesgate Yacht Club. Public health officials recommend that people and pets avoid contact in areas of algae concentration and rinse thoroughly in the event of contact.
For additional information on cyanobacteria blooms, we encourage you to visit the following websites:
https://www.mass.gov/lists/algae-information
https://www.mass.gov/guides/cyanobacterial-harmful-algal-blooms-cyanohabs-water
https://www.cdc.gov/habs/index.html
https://www.epa.gov/cyanohabs
Current Cyanobacteria Bloom Advisories - https://www.mass.gov/alerts/harmful-cyanobacterial-bloom-advisories-in-massachusetts
At this time, it is recommended that you avoid contact with the water. People should rinse off with fresh water immediately if they or their pet comes into contact with the water. If you believe you or your pet is experiencing adverse health effects, contact your doctor or veterinarian immediately. Blue-green algae is extremely toxic to pets.
CRWA’s water quality models are predicting blue flags at all other boathouses, based only on E. coli bacteria predictions.

Community Rowing, Inc.

Newton Yacht Club

Northeastern's Henderson Boathouse

Paddle Boston at Herter Park

Watertown Yacht Club

Cambridge Boat Club

Harvard's Weld Boathouse

Boston University DeWolfe Boathouse

Riverside Boat Club

Charlesgate Yacht Club

Charles River Yacht Club

Paddle Boston at Kendall Square

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.