Weather conditions, circumstances and time permitting, mosquito spraying is scheduled midnight Sunday to 5 am Monday morning in Chandler, Gilbert and Queen Creek.
The area in Chandler is from Elliot to Warner roads and from the Price/101 Freeway to Dobson Road.
The area in Gilbert is from Elliot to Warner roads and from Greenfield to Higley roads.
The first area in Queen Creek is from Marsh Road to Hunt Highway/Empire Boulevard and from Crismon to Ellsworth roads.
The second area in Queen Creek is from Chandler Heights to Riggs roads and from Ellsworth to Crismon roads.
The third area in Queen Creek is from Chandler Heights to Riggs roads and from Crismon to Signal Butte roads.
The fourth area in Queen Creek is from Ocotillo to Chandler Heights roads and from Sossaman to Hawes roads.
Mosquito spraying takes place when area traps are found with a high number of mosquitoes or when those mosquitoes test positive for West Nile virus.
Three human cases of West Nile virus have been reported this summer. The illness is transferred from infected mosquito to humans through bites.