The Massachusetts Water Resources Authority's (MWRA) has
been monitoring water quality in Boston Harbor and its tributary rivers since
1989. Collecting long-term water quality data helps to identify
changes in water quality over time. Data Analysis & Interpretation of MWRA water quality data in Boston Harbor and Massachusetts Bay are available for download on our Technical Reports List.
Download Monitoring Data from the tables below.
Boston Harbor's Tributary Rivers
Download Data from Boston Harbor Beaches
How MWRA manages water quality data