The City of McKinney will spray an area of the city after the Labor Day weekend, from Sept. 4-6, in an effort to prevent more human cases of West Nile Virus.

The spray area is generally east of Stonebridge Drive, south of U.S. 380, west of Lake Forest Drive and north of McKinney Ranch Parkway. Crews will spray overnight starting around 10 p.m., weather permitting.

Residents in the spray area are advised to stay indoors during the spray period and bring their pets inside that evening. A map of all areas of the city that have been sprayed to treat for West Nile Virus is posted on the city’s website at

For more information, or to report standing water, illegal dumping and increased mosquito activity, call the West Nile information line at 972-547-7473. The city will continue to monitor mosquito activity and take measures to control mosquitoes as needed.

The chemical sprayed during mosquito-control measures to combat the West Nile Virus is Aqualeur 20/20, a synthetic compound similar to a chemical that occurs naturally in Chrysanthemums.