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The City of Cambridge and Cambridge Public Health Department understand that wearing masks or cloth face coverings may not be possible in every situation or for some people, especially during the summer. However, Wearing masks and face coverings are a critical preventive measure, particularly in situations where physical distancing is difficult. Learn face covering safety tips for hot summer days.

Avoid Contact with the Charles River in Cambridge and Alewife Brook Through March 16 Due to Potential Harmful Bacteria and Other Pollutants

Join us for our virtual celebration of the Cambridge Science Festival this year! Science in the City explores the science behind the work we do at the City of Cambridge.

Avoid Contact with the Alewife Brook in Cambridge Due to Potential Harmful Bacteria and Other Pollutants Until December, 13, 2023

Avoid contact with the Alewife Brook in Cambridge due to potential harmful bacteria and other pollutants. Warning in effect until 5 a.m., January 28, 2023. People and pets should avoid contact with the Alewife Brook and parts of the Mystic River from January 26-28 due to the release of stormwater mixed with sewage into the brook.

Every fire company in the city trains every day

Head out onto the Reservation with Ranger Jean to help with the hard work needed to keep Fresh Pond beautiful!

Learn more about the Huron Avenue Reconstruction project under design.

Explore local birds in their natural habitat - in your neighborhood and beyond!

Meeting minutes of the Conservation Commission meeting held March 23, 2026