Commonwealth of Massachusetts Updates Mask Advisory for Vaccinated and Unvaccinated Residents
Effective December 21, 2021: In response to the spread of the Delta variant and the emerging Omicron variant, the Department of Public Health now advises that all residents, regardless of vaccination status, wear a mask or face covering when indoors (and not in your own home). The DPH particularly urges this recommendation if you have a weakened immune system, or if you are at increased risk for severe disease because of your age or an underlying medical condition, or if someone in your household has a weakened immune system, is at increased risk for severe disease, or is unvaccinated.
USGS Fact Sheet 2015
Updated fact sheet from USGS including information about water quality in the Cambridge watershed
Water Treatment
A description of the Cambridge Water Departments Water Purification Process