Region 4b is comprised of 27 communities that form a crescent around Boston. These
communities have a combined population of 980,000. The Cambridge Public
Health Department, as the host agent for Region 4b, acts as the fiscal and
administrative agent for Region 4b as well as coordinating planning and response
activities for the region.
Learn more about each of our communities by clicking each city/town on the map and
going directly to the corresponding health department website. You may also view
Region 4b Directory to contact each health department directly.
Massachusetts Emergency Preparedness Region 4b | 119 Windsor Street, Ground Level
| Cambridge, MA 02139 | (617) 655-3688