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Mosquito Control

The Boston Public Health Commission (BPHC) partners with the Suffolk County Mosquito Control Project (SCMCP) to protect Boston residents from mosquito-borne disease transmission.

Mosquito-borne illnesses spread to people by the bite of an infected mosquito. Examples include West Nile Virus (WNV) or Eastern Equine Encephalitis (EEE) virus. The season for mosquito borne illness in Boston is summer through early fall.

As of September 9, 2022, the risk level for West Nile Virus in Boston is: high.

What it meansMore people may get infected with WNV in your area.

What you can do to prevent WNV infection:
  1. Be prepared: Know your risk -check this page regularly, repair screens, clean up to get rid of mosquito breeding sites, be aware of stagnant water on private property (e.g. unused swimming pools) and consult the local board of health.
  2. Wear long sleeves and long pants from dusk to dawn when weather permits
  3. Use mosquito netting on baby carriages and playpens
  4. Wear mosquito repellent when outdoors, especially between dusk and dawn
  5. Dump standing water twice weekly
  6. People over 50 or those who are immune compromised should adjust outdoor activity to avoid peak mosquito hours (from dusk to dawn)

What we do

BPHC partners with the Suffolk County Mosquito Control Project (SCMCP) to protect Boston residents from mosquito-borne disease transmission. The SCMCP collects mosquito samples in traps every week during the summer and early fall. These traps are throughout the City. They test the samples at the Hinton State Laboratory to determine if WNV or EEE virus is present.

Information from mosquito collections helps determine where to put extra precautions to keep Boston residents safe. This may include truck mounted aerosol spraying to control adult mosquito populations.

Positive Collection Results: Summer 2022

County City Date Collected Species Quadrant Agents
Suffolk Boston July 25, 2022 Culex pipiens/ restuans complex  Southwest WNV
Suffolk Boston July 25, 2022 Culex pipiens/ restuans complex  Southwest WNV
Suffolk Boston August 2, 2022 Culex pipiens/ restuans complex Roxbury/Mattapan WNV
Suffolk Boston August 2, 2022 Culex pipiens/ restuans complex Roxbury/Mattapan WNV
Suffolk Boston August 2, 2022 Culex pipiens/ restuans complex Roxbury/Mattapan WNV
Suffolk Boston August 16, 2022 Culex pipiens/ restuans complex Dorchester WNV
Suffolk Boston August 16, 2022 Culex pipiens/ restuans complex Jamaica Plain WNV
Suffolk Boston August 29, 2022 Culex pipiens/ restuans complex Jamaica Plain WNV
Suffolk Boston August 29, 2022 Culex pipiens/ restuans complex Jamaica Plain WNV
Suffolk Boston August 29, 2022 Culex pipiens/ restuans complex Brighton WNV
Suffolk Boston September 1, 2022 Culex pipiens/ restuans complex Hyde Park WNV
Suffolk Boston September 1, 2022 Culex pipiens/ restuans complex Hyde Park WNV
Suffolk Boston September 1, 2022 Culex pipiens/ restuans complex Hyde Park WNV
Suffolk Boston September 1, 2022 Culex pipiens/ restuans complex Jamaica Plain WNV
Suffolk Boston September 1, 2022 Culex pipiens/ restuans complex West Roxbury WNV
Suffolk Boston September 1, 2022 Culex pipiens/ restuans complex Roslindale WNV
Suffolk Boston September 8, 2022 Culex pipiens/ restuans complex Dorchester WNV
Suffolk Boston September 13, 2022 Culex pipiens/ restuans complex East Boston WNV
Suffolk Boston September 13, 2022 Culex pipiens/ restuans complex Charlestown WNV
Suffolk Boston September 13, 2022 Culex pipiens/ restuans complex Charlestown WNV
Suffolk Boston September 13, 2022 Culex pipiens/ restuans complex Charlestown WNV

Spraying

Mosquito spraying happens between dusk and 11:30 p.m. on scheduled days in targeted areas of the City (depending on weather).

SCMCP advises that if people see a spray truck approaching, they should go indoors for a few minutes. Residents should close any windows that face the street during scheduled spraying. View more information on spraying.

Application to exclude property from mosquito spraying

Residents can file to have their property excluded from spraying at any time of the year. You can file electronically through the Massachusetts Department of Agricultural Resources (MDAR) or mail a paper form to MDAR. For questions, call Juan Carlos Gutierrez at 617-626-1723 or email Juan.Gutierrez@state.ma.us.

Scheduled Mosquito Spraying in Boston

(Updated:  April 13, 2021)

Mosquito spraying is scheduled as needed during the summer and early fall. Mosquito spraying is subject to weather and may need to be rescheduled. Changes to scheduled spraying will be posted here.

Scheduled Date Neighborhood Location
Between
April 19, 2021- 
April 30, 2021 
Hyde Park ​Wetlands areas in the Fowl Meadow.
The Bti will be applied in a granular formulation by a helicopter flying low directly over the wetlands. Residents do not need to take any special precautions for this application. 
​Between
April 19, 2021- 
April 30, 2021
West Roxbury Hancock Woods area near VFW Parkway and Corey Street.
The Bti will be applied in a granular formulation by a helicopter flying low directly over the wetlands. Residents do not need to take any special precautions for this application. 
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