Weather conditions, circumstances and time permitting, areas of Gilbert, Mesa and Queen Creek are scheduled to be fogged midnight Saturday to 5 a.m. Sunday.
The first area in Gilbert is from Ocotillo to Chandler Heights roads and from Recker to Power roads.
The second area in Gilbert is from Guadalupe to Elliot roads and from Greenfield to Higley roads.
The area in Mesa is from Southern Avenue to Baseline Road and from Greenfield to Higley roads.
The first area in Queen Creek is from Chandler Heights to Riggs roads and from Ellsworth to Crismon roads.
The second area in Queen Creek is from Ocotillo Road to Calle De Flores and from Signal Butte to 218th Street.
Spraying takes place when a high number of mosquitoes are captured in area traps or when captured mosquitoes test positive for West Nile virus.
For information, call (602) 506-0700.