Community Development

City of Keene Public Health Mosquito Control Program

Public Notice

City of Keene Public Health Mosquito Control Program
West Nile Virus and Eastern Equine Encephalitis

Spraying to control larval mosquitos will begin on May 27, 2022 in the City of Keene. Larval mosquitoes will be controlled in areas such as marshes, red maple swamps, woodland pools, flooded fields, roadside ditches and flooded stormwater basins. Mosquito larvae found in street and parking lot catch basins will also be controlled. With the advent of Zika Virus, mosquito populations will be monitored for associated vector mosquitoes.

The primary control agent will be a bacterium larvacide called Vectobac (BTI) or Vectolex (Bs). This environmentally- friendly biological control is very specific to mosquito larvae and is used worldwide in mosquito control. The bacterium is naturally occurring and will not replicate in the environment.

Spraying to control larvae will continue as needed until December 15, 2022. Control agents will only be applied where larvae are collected.
Town officials may decide to complete emergency adulticide (bifenthrin) spraying to parks, athletic fields, schools, and other public areas should a public health emergency dictate.

Persons not wishing their properties treated must contact John Rogers, Keene Health Department, City Hall, Fourth Floor, 3 Washington Street, Keene, NH 03431. Information on biological control agents, insecticides, areas likely to be treated or any potential hazards is available upon request to Municipal Pest Management Services, Inc. @ 603-431-0008 or @ Requests for service can be made on our website,

Municipal Pest Management Services, Inc. will provide mosquito control services for the City of Keene in 2022.