The three teams are Greenwich Emergency Medical Services, Greenwich Fire Department and the Greenwich Police Department.
Support your team from 8 a.m. to 1:45 p.m. at the Greenwich Public Safety Complex, 11 Bruce Place, Greenwich.
To schedule an appointment to donate blood, call 1-800-RED CROSS (1-800-733-2767) or visit redcrossblood.org.
Click here to follow Daily Voice Greenwich and receive free news updates.