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upcoming events

Sept 10
Water Trouble Forum, 7PM
Winn Brook School, 97 Waterhouse Rd, Belmont

Sept 12
Mare Liberum journey down the Mystic, 11AM

Sept 14
Friends of the Malden River meeting, 6:30PM
Cambridge Health Alliance, 195 Canal St, Malden

Sept 15
Flatbread Pizza Doughraiser, 5PM-11PM
45 Day St, Somerville, MA

Sept 19
Canoe Tour (free!), 9AM
Mystic Wellington Yacht Club, Medford
Register today

Sept 22
Blessing of the Bay, Somerville

Oct 6
Committee Meeting, 7-9PM
Arlington Town Hall, 730 Massachusetts Avenue, Arlington - Selectmen's Hearing Room, 2nd floor


The Mystic River Watershed has a long history of industrialization, that while allowing our communities to prosper economically has resulted in a legacy of contamination that continues to effect our waterbodies today.  As we proceed to learn about these effects, we are seeing slight improvements in water quality. View the pages listed below for additional information about issues currently impacting the Mystic River Watershed.



Have you ever wondered if it is safe to swim or boat in the Mystic River? Some days, especially after a heavy rain, a swimming or boating advisory may be issued by the local municipality. Click here for more information on CSO's.





Cyanobacteria (cyano=blue-green) are a type of algae found naturally in aquatic and terrestrial environments. Under the right conditions, cyanobacteria can grow rapidly resulting in an algal bloom. Environmental factors such as light, temperature, and nutrients contribute to bloom formation. Follow the link here for more information on MyRWA's Cyanobacteria monitoring program.



Mystic River communities have a disproportionate share of cumulative environmental hazards. Read more about Environmental Justice concerns in the Mystic.





Are the fish contaminated? Check out the Public Health Fish Advisory to find out more about the health of fish in the Mystic River. Click here for more information on the Fish Consumption Advisory page.





Sanitary sewer overflows, or SSOs, are discharges of raw sewage into surrounding water sources and communities that pose as a substantial public health risk. MyRWA addresses SSOs through data management, advocacy and outreach. Click here for more information on SSO's.




Stormwater and Run-off (Non-Point Source Pollution) is a major cause of water pollution in the Mystic River and its tributaries, affecting fisheries, habitat quality, flora and fauna, and the overall beauty of the river. Click here for more information on Non-Point Source pollution.




The Mystic River Watershed is home to three EPA sanctioned Superfund sites, or areas of toxic waste. Learn more about Superfund sites and what is being done to clean them up here. Click here for more information on Superfund Sites in the Mystic River Watershed.




The Mystic River Watershed hosts many invasive species, or non-native species that negatively impact the ecosystem such as the Water Chestnut. Read more about Water Chestnuts and other invasives. Click this link for the Groundwork Somerville & Americorp Water Chestnut Removal Project details.



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