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Boston Harbor and Massachusetts Bay
MWRA Environmental Quality Department

The Massachusetts Water Resources Authority monitors water quality at more than 50 locations in Boston Harbor (including Quincy, Hingham, and Dorchester Bays) and in the Charles, Mystic, and Neponset rivers. Sampling helps to evaluate the impacts of system improvements, urban runoff, and combined sewer overflows (CSOs). Measurements include temperature, pH, salinity, dissolved oxygen, water clarity, nutrients, suspended solids, fecal indicator bacteria and algae. Recent data is collected and outlined in the Boston

MONTHLY SAMPLING LOCATIONS
Boston Harbor monitoring Boston Harbor monitoring
Boston Harbor monitoring Mystic River monitoring Boston Harbor monitoring Boston Harbor monitoring
Boston Harbor monitoring Boston Harbor monitoring Boston Harbor monitoring
Boston Harbor monitoring CBoston Harbor monitoring Mystic River monitoring Boston Harbor monitoring
Boston Harbor monitoring Boston Harbor monitoring
Boston Harbor monitoring Boston Harbor monitoring Boston Harbor monitoring
Boston Harbor monitoring Neponset River and Southern Dorchester Bay monitoring Boston Harbor monitoring Boston Harbor monitoring
Boston Harbor monitoring Boston Harbor monitoring
Boston Harbor monitoring Boston Harbor monitoring
Boston Harbor monitoring Boston Harbor monitoring Boston Harbor monitoring Boston Harbor monitoring Boston Harbor monitoring Boston Harbor monitoring Boston Harbor monitoring Boston Harbor monitoring Boston Harbor monitoring

HARBOR AND RIVER WATER QUALITY INFORMATION

In contrast with most of Boston Harbor, the rivers frequently do not meet the Massachusetts state water quality standard of average fecal coliform counts of less than 200 colonies per 100 ml. This is due to the impacts of CSOs and urban storm runoff. Below are links to water quality pages.
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