cambridge August 29, 2022 5:19 am Cambridge Temporarily Switching Water Supplies Due to PFAS Forever Chemicals The city has found increasing levels of PFAS chemicals in its finished water supply, and the change in source will begin Tuesday. US & World Videos 3:05 100 protesters detained at Northeastern University 2:39 Community mourns police sergeant killed on duty 4:32 Anti-war protester at Northeastern speaks amid arrests: ‘We are peaceful students' 5:39 Billerica police sergeant hit and killed by excavator during construction detail 2:30 Arrests made in string of home break-ins targeting Asian-Americans