City Mosquito Control Combats West Nile Virus

Photo Credit: Alvesgaspar –

Commencing as early as June 1 and ending as late as October 31, 2022, Hamilton Public Health Services is conducting ongoing monitoring of mosquito larvae, known as immature mosquitos, in standing surface water within the city’s boundaries on city-owned property. As you may recall, this is an annual operation and when monitoring indicates there is a need for mosquito control, application of larvicide may be required in order to prevent larval development into vectors of West Nile Virus. Locations for larvicide application may include identified standing surface water located on public property, catch basins of storm drains on city streets and on selected publicly-owned properties.

The application of the larvicides will be carried out under permit from the Ontario Ministry of Environment, Conservation and Parks, and all control products will be applied by licensed applicators or trained technicians of Pestalto Environmental Health Services Inc., under contract with the City of Hamilton.

As part of the annual notification to the community, an ad will be published in the Hamilton Spectator on Tuesday, May 24, as required by the Ministry, and a media release, included below, will also be issued to local media outlets Tuesday morning.

Here as well are precautions your constituents can take to protect themselves against mosquito bites, including:

  • Using a mosquito repellent (bug spray) containing DEET or Icaridin.
  • Avoiding areas where mosquitoes are known to be present or cover up by wearing light coloured long sleeves and long pants when in mosquito areas such as wooded areas, on the golf course, or in the garden, especially at dawn and dusk when mosquitoes are most active.

Reducing mosquito breeding sites by removing standing water at least weekly from your property. Mosquitoes lay their eggs in very shallow standing water. If you remove the standing water, they cannot lay eggs