Biological history in Massachusetts
Massachusetts has 29 county-level biological declarations across 14 counties. Barnstable County leads with 3 declarations. Total tracked FEMA obligations for biological events in this state: $3.4B.
This page shows every Massachusetts county in Massachusetts that has at least one FEMA biological declaration on record, ranked by how many times that hazard type triggered federal aid. Counties near the top of this list have recurring exposure to biological events — useful context for anyone evaluating property risk, insurance needs, or emergency planning in the area.
For the full national view of biological declarations across all states, see the biological disaster type page. For all hazard types in Massachusetts, see the Massachusetts state page.
Counties ranked by biological declaration count
| # | County | Declarations | Tracked aid |
|---|---|---|---|
| 1 | Barnstable County | 3 | $23.7M |
| 2 | Berkshire County | 2 | $21.2M |
| 3 | Bristol County | 2 | $96.3M |
| 4 | Dukes County | 2 | $583K |
| 5 | Essex County | 2 | $71.4M |
| 6 | Franklin County | 2 | $1.7M |
| 7 | Hampden County | 2 | $60.8M |
| 8 | Hampshire County | 2 | $32.7M |
| 9 | Middlesex County | 2 | $1.4B |
| 10 | Nantucket County | 2 | $181K |
| 11 | Norfolk County | 2 | $57.2M |
| 12 | Plymouth County | 2 | $31.0M |
| 13 | Suffolk County | 2 | $1.4B |
| 14 | Worcester County | 2 | $254.3M |