News Flash


Posted on: August 28, 2020

Mosquito Pool Tests Positive for WNV; City to Spray Saturday and Sunday Nights

(August 28, 2020) The City of Frisco will spray for mosquitoes this weekend along the Cottonwood Creek Parkway after receiving confirmation a mosquito pool tested ‘positive’ for West Nile virus (WNV).  Beginning Saturday, August 29, a third party contractor will drive a designated area throughout select neighborhoods fogging for mosquitoes (see attached map). Spraying will happen generally in the following  neighborhoods:

  • Country Club Ridge at the Trails 
  • The Fairways
  • Shaddock Creek Estates (Phases 1 - 4, 5 & 6)
  • Heather Ridge Estates 
  • The Trails of West Frisco

Treatment will begin at 9 p.m. Saturday, August 29 and continue through 5 a.m. Sunday, August 30.  Spraying resumes Sunday night at 9 p.m. and will finish at 5 a.m. on Monday, August 31.  No human cases of the virus are confirmed in Frisco. This is the tenth positive pool in Frisco this season.

"Although not all mosquito species have the ability to transmit the disease, it just takes one bite from an infected mosquito to do so," said Julie Fernandez, Environmental Health Supervisor.  "That is why it is important for people to drain any standing water around their homes to help ensure no potential breeding areas exist on their property."

The City of Frisco supports four precautionary habits, commonly referred to as the 4Ds, promoted by the Texas Department of State Health Services.

  • DEET: Use approved insect repellents: Use repellent every time you go outside. Approved repellents contain DEET, picaridin or oil of lemon eucalyptus. Follow label instructions.
  • DRAIN: Drain standing water: Drain water that collects in bird baths, French drains, clogged gutters, saucers under potted plants and ‘splash blocks’ (at end of gutter down spout). The mosquitoes that carry WNV can breed in stagnant water.
  • DRESS: Wear long sleeves, pants at dawn and dusk (when mosquitoes are most active).
  • DAWN/DUSK: Use air conditioning. Make sure doors and windows are screened – and those screens are intact.

In accordance with its plan, Frisco began testing for mosquitoes May 1.  For more information on the city’s Mosquito Surveillance and Response Plan, visit or contact the City of Frisco’s Health & Food Safety Division at 972-292-5304.

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