How it Works

When a “pool” of mosquitoes tests positive for West Nile Virus, the Environmental Quality Division personnel spray the area surrounding the site where the positive sample was trapped. The spraying takes place at night from a truck mounted sprayer.

Further mosquito trapping of the area is performed the following weeks to determine if the mosquitoes carrying the disease have been eliminated in the sprayed area. For more information, contact the Environmental Quality Division at 972-237-8055. 

In an effort to manage the mosquito population and educate the public on this serious issue, the City also takes the following measures:

  • Surveys the areas where positives have been found.
  • Surveys low lying areas for standing water. When possible mosquito habitat is found, larvicide is applied.
  • Applied larvicide to over 20 areas throughout the city.
  • Provides post cards and door hangers to residents with pools.
  • Inspects pools on complaints and at known vacant residences.
  • Provides information to vulnerable populations.
  • Provides mosquito dunks. The donut shaped bacteriological control agent against mosquitoes is available at the Environmental Services Department offices located at 300 W. Main St., 2nd Floor, Grand Prairie, TX 75050. Dunks are limited at 2 per household. Read more information on the mosquito dunk larvicide (PDF).
Mosquito Control Program Goals