Frisco to Spray for West Nile Virus After Positive Mosquito Tests

The City of Frisco confirmed that two mosquito pools tested positive for West Nile virus (WNV) this week. In response, the city’s third-party contractor will perform ground spraying overnight starting at 9 p.m. on Saturday, October 17, through 5 a.m. Sunday morning. Spraying will continue on Sunday night, October 18, ending at 5 a.m. Monday morning, weather permitting.

The targeted areas include Fairfield Estates, Lakes of Preston Vineyards, Parkside Estates, Plantation Estates, Preston Lakes, Preston Vineyards North, Shepherds Hill, and Stonebryck Manor. Additional spraying will occur in Frisco Lakes. Residents can view specific locations via the city’s provided maps.

This detection brings the total number of positive mosquito pools in Frisco to 16 for 2026. The city has not confirmed any human cases of WNV this year. Under its Mosquito Surveillance and Response Plan, Frisco tests mosquito pools from May 1 through November 15. Residents can view historical data on the GIS Mosquito Dashboard.

The Texas Department of State Health Services urges residents to follow three precautionary steps to prevent mosquito bites: Wear long sleeves and pants outside at dawn and dusk; apply insect repellants containing DEET, picaridin, or oil of lemon eucalyptus every time you go outside; and remove standing water from bird baths, French drains, clogged gutters, saucers under potted plants, and splash blocks.

Mosquitoes that carry WNV breed in stagnant water.

For more information on the city’s plan and prevention methods, residents may visit FriscoTexas.gov/Mosquitoes or contact the City of Frisco’s Health & Food Safety Division at 972-292-5304.

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