Mosquitoes in Massachusetts

During peak mosquito season from the spring to the fall, the Cape Cod area sees a rise in mosquito-borne illnesses such as West Nile Virus (WNV), Eastern Equine Encephalitis (EEE), Zika virus, Dengue virus, and Chikungunya virus (CHIKV).

Map showing the Eastern Equine Encephalitis Risk in Massachusetts as of October 7, 2019.

How to protect yourself from mosquito-borne illness:

Avoid mosquito bites by following these tips:
  • wear long-sleeved clothing
  • avoid outdoor activity during peak mosquito times like dusk and dawn
  • use insect repellents such as DEET, Picaridin, or Oil of Lemon Eucalyptus (OLE)
  • make certain there are no pools of standing water nearby in which mosquitoes may breed