Dallas is rolling out overnight mosquito spraying in three half-mile zones on Monday and Tuesday after city traps turned up West Nile virus. City trucks are slated to run from 9 p.m. to 5 a.m., weather permitting, targeting residential stretches in several council districts. Officials are asking people in the spray areas to stay inside while trucks pass and to stick to basic mosquito-prevention steps to cut down on bites.
City posts alert after positive mosquito tests
According to the City of Dallas, the overnight treatments will cover three half-mile areas to knock down local mosquito populations while crews continue testing and mapping trap results. The update, posted late Monday, directs residents to the city’s mosquito-control pages for treatment maps, details on the spray product and information on opting out.
(2/2) 🦟 Weather permitting, these half-mile areas are scheduled for mosquito control spraying 9p - 5a on Mon & Tue, June 22 - 23.
— City of Dallas (@CityOfDallas) June 22, 2026
📍 800 N. EDGEFIELD AVE (75208)
📍 6200 DESCO AVE (75225)
📍 9000 VISTA CREEK DR (75243)
MORE INFO: https://t.co/5d73WX8AK1
Spray zones and safety
“Mosquito samples in Dallas have tested positive for the West Nile Virus,” the city reported in a press release from the City of Dallas. The notice identifies treatment areas centered near 800 N. Edgefield Ave, 6200 Desco Ave and 9000 Vista Creek Dr, and reminds residents and drivers not to trail the spray trucks and to remain indoors while the operations are underway.
How to protect yourself
The Centers for Disease Control and Prevention advises using an EPA-registered insect repellent, wearing long sleeves and pants during peak mosquito hours at dusk and dawn, and dumping out standing water where mosquitoes breed. Those simple moves are described as the first line of defense against West Nile in CDC guidance. The agency also notes that local mosquito-control programs may rely on ultra-low-volume adulticide sprays when traps test positive.
The Environmental Protection Agency states that adulticides used in public-health mosquito programs are applied in very small amounts by trained staff and, when used according to label directions, are considered appropriate tools for targeted mosquito control efforts. EPA
Where this fits in the season
Dallas County Health & Human Services has logged multiple West Nile-positive mosquito pools this season and maintains a public arbovirus dashboard that offers weekly surveillance updates, which the county uses to guide targeted spraying when pools turn up positive. The agency notes that positive traps trigger focused adulticiding to cut transmission risk.
Local coverage has highlighted additional spot-spraying around Dallas this month as public-health teams respond to new positive pools. Patch
What residents should do next
Residents who do not want their property treated can call 3-1-1 and request the mosquito “Do Not Spray” opt-out for their address. The city press release lists Narada Lee with Code Compliance Consumer Health as a contact for additional questions.
For real-time treatment maps and spray alerts, residents can check the city’s mosquito-control resources and keep an eye on updates as trucks move through the listed neighborhoods. If someone thinks they were directly exposed to the spray, city guidance recommends washing the affected skin with soap and water and reaching out to a health care provider if any symptoms or concerns develop.
