OUR MISSION
The Mystic River Watershed Association (MyRWA) works to protect and restore the Mystic River, its tributaries and watershed lands for the benefit of present and future generations and to celebrate the value, importance and great beauty of these natural resources.
MYSTIC RIVER ENVIRONMENTAL ATLAS
The Mystic River Watershed Association is pleased to unveil a new luminous, user-friendly Mystic River Environmental Atlas produced with the Metropolitan Area Planning Council (MAPC). The Mystic River Environmental Atlas is an interactive map that allows one to access information about the Mystic River Watershed, including: Water Quality Data, Recreational Opportunities, Accessibility, and Physiography. Please explore the Mystic River Environmental Atlas!
For the full version of the Mystic River Environmental Atlas click here.
Please provide feedback on the Mystic River Environmental Atlas to MyRWA. 
BOATING AND SWIMMING ADVISORY
RE: Notice Alert: CSO Activation in Alewife Brook
DATE: January 25, 2010
The City of Cambridge has issued an advisory that Combined Sewer Overflow (CSO) CAM401B has discharged to Alewife Brook within the last 48 hours (see attached). During heavy or prolonged rain events, CSOs can discharge stormwater mixed with untreated sewage. Discharges from CSOs contain levels of bacteria, viruses, raw sewage and other pollutants that may pose health risks to people who come in direct or indirect contact (e.g. contact with pets swimming in contaminated water). Contact with CSO-contaminated water should be avoided.
This notification from the City of Cambridge about activity at CSO CAM401B is required of Cambridge by the state Department of Environmental Protection's (DEP) as a condition of their variance permit under the state Water Quality Standards for Alewife Brook/UpperMystic River.