Daily update on water quality in the lower Charles River Basin

Welcome to Charles River Watershed Association's water quality information list. This list provides DAILY email updates during the summer and fall seasons regarding Charles River water quality in the Charles River Basin. This list was created specifically for boathouses that participate in CRWA's flagging program and for interested members of the public. CRWA's Flagging Program presents the daily flag colors of the river's health, which signify whether or not the river is safe for boating at nine boating locations from Watertown to Boston. A blue flag indicates safe boating conditions; a yellow flag indicates inconclusive data to predict possible health risks; a red flag indicates likely health risks. Bacteria levels from four sampling sites in the Lower Charles will also be included twice a week in the daily notification email.