West Nile virus prompts Fort Collins to spray for mosquitoes

DENVER (KDVR) — The city of Fort Collins announced on Thursday that there will be two days of mosquito spraying in the area due to “high levels” of West Nile virus.

In the press release, the spraying will be done by fogging trucks on July 17 and July 20, and will take place around 8 p.m. those nights and go until to 2 a.m. the following mornings.

West Nile virus: 3 counties confirm first positive mosquitoes of 2025

The south Fort Collins spraying areas include:

  • Taft Hill Road to Ziegler Road
  • The area between Horsetooth Road and Trilby Road
  • Portions of the Westchase and Kechter Farm neighborhoods south of Trilby Road.

The city is asking residents to stay indoors and keep pets inside during the spraying. People are also asked to keep doors and windows closed for 30-60 minutes after spraying to “minimize pesticide exposure.”

The decision to spray for mosquitos comes from a recommendation by the Larimer County Department of Health and Environment, which comes after Larimer County found West Nile virus in mosquito testing in the southeast area of Fort Collins…

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