The city of Frisco confirmed on July 3, 2025, that two mosquito pools have tested positive for West Nile virus (WNV) — the first such cases reported in the city this year.
In response, officials are increasing surveillance and intensifying larviciding efforts in the affected neighborhoods. The city has decided not to spray at this time.
Where the Virus Was Detected
One positive mosquito pool was found near the intersection of McCommas Drive and Michelle Drive in the Creekside at Preston neighborhood. The other was detected in the Hunter’s Creek and Turnbridge Manor neighborhoods.
Residents can track these and previous cases using the city’s GIS Mosquito Dashboard, which displays real-time mapping of test results across Frisco.
What the City Is Doing
In line with its Mosquito Surveillance and Response Plan, the city of Frisco routinely tests mosquito pools from May through mid-November. Following the recent positive results, officials will increase larviciding in the affected areas to kill mosquito larvae and prevent further spread.
Although no human cases of West Nile have been reported in Frisco this year, Environmental Health Manager Jazalyn Harp urges residents to remain proactive:
“It’s important residents stay vigilant and help reduce mosquito breeding by eliminating sources of standing water on their property,” Harp said in an official statement.
What You Can Do: Wear, Apply and Remove
To protect against mosquito bites and reduce the spread of WNV, Frisco residents are encouraged to follow these simple guidelines, promoted by the Texas Department of State Health Services:
- Wear: Long sleeves and pants, especially at dawn and dusk when mosquitoes are most active.
- Apply: Use insect repellents containing DEET, picaridin or oil of lemon eucalyptus every time you go outside.
- Remove: Drain standing water around your home — look for birdbaths, clogged gutters, potted plant saucers, French drains and splash blocks.
To learn more about the city’s mosquito control efforts or report concerns, visit FriscoTexas.gov/mosquitoes or contact the city of Frisco’s Health & Food Safety Division at 972-292-5304.
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