Adult Mosquito Spray CalendarAugust 2025SunMonTueWedThuFriSat272829303112Aerial (plane) Spraying for Adult Mosquitoes; Grandview, Prosser, and Richland345Ground Based (Truck) Spraying for Adult Mosquitoes; Benton City, Prosser, and Richland6789Aerial (plane) Spraying for Adult Mosquitoes; Grandview, Prosser, and Richland10111213141516Postponed due to wind: Aerial (plane) Spraying for Adult Mosquitoes; Grandview/Prosser area1718Ground Based (Truck) Spraying for Adult Mosquitoes; Mabton and West Richland19Ground Based (Truck) Spraying for Adult Mosquitoes; Benton City, Mabton, and West RichlandAerial (plane) Spraying for Adult Mosquitoes; Grandview/Prosser area20Ground Based (Truck) Spraying for Adult Mosquitoes; Benton City, Prosser, Richland, Sunnyside, and West Richland21Ground Based (Truck) Spraying for Adult Mosquitoes; Finley2223242526272829Ground Based (Truck) Spraying for Adult Mosquitoes; Benton City, Grandview, Mabton, Prosser, Sunnyside, and West Richland303112Aerial (plane) Spraying for Adult Mosquitoes; Grandview, Prosser, and West Richland3456
