More than 40 Massachusetts beaches were closed for swimming on Monday, July 1, due to the presence of dangerously high bacteria levels or cyanobacteria blooms, according to the state’s beach ...

More than 30 Massachusetts beaches were closed for swimming on Sunday, July 7, due to the presence of dangerously high bacteria levels or cyanobacteria blooms, according to the state’s beach ...

Donovans and Pico Beaches in Winthrop and Black Rock Beach in Nahant were also closed due to high bacteria levels. Several beaches on the South Shore were also closed on Monday.

The DPH's water quality dashboard "is updated at 9:30 a.m. and 12:30 p.m. every day (including weekends) during the beach season," according to Mass.gov. What sicknesses can be caused by swimming ...