The public health discipline is divided into the following coalitions within the HMCC Region 3:
- Region 3A – Northeast Public Health Coalition: Amesbury, Boxford, Georgetown, Groveland, Haverhill, Ipswich, Merrimac, Middleton, Newbury, Rowley, Salisbury, Topsfield and West Newbury.
- Region 3B – Greater Lawrence Public Health & Bioterrorism Coalition: Andover, Lawrence, Lynnfield, Methuen, North Andover, North Reading and Reading.
- Region 3C – Upper Merrimack Valley Public Health Coalition: Billerica, Chelmsford, Dracut, Lowell, Tewksbury, Tyngsborough and Westford.
- Region 3D – North Shore/Cape Ann Emergency Preparedness Coalition: Beverly, Danvers, Essex, Gloucester, Hamilton, Lynn, Manchester, Marblehead, Nahant, Peabody, Rockport, Salem, Saugus, Swampscott and Wenham.
- Region 3E – Mystic Valley Coalition: Malden, Medford, Melrose, Stoneham and Wakefield.
Public health professionals promote the health and well-being of their communities by preventing residents from getting sick or injured and by encouraging healthy lifestyles. The public health field is comprised of a variety of functions including promoting healthy lifestyles, detecting and controlling outbreaks, research, and preventing injury. Some examples of recent public health work include anti-smoking campaigns, flu-clinics, and targeting sources of food-borne illness.
Some examples of the many fields within public health include:
- First responders
- Restaurant inspectors
- Health educators
- Scientists and researchers
- Community planners
- Social workers
- Public health physicians
- Public health nurses
- Occupational health and safety professionals
- Public policymakers