The agricultural areas of western Placer County are scheduled for treatment. An EPA-approved mosquito adulticide will be applied in an Ultra-low Volume (ULV) fog by aircraft in an effort to address increased mosquito populations and West Nile virus activity.
- Western Placer County agricultural areas West of Roseville, between East Catlett Rd and Baseline Rd. See map here.
- Northwest Placer County agricultural areas north of Wise to the Bear River and west of HWY 65. See map here.
Since several factors affect treatment activities, such as weather and wind conditions, the District encourages Placer residents to check this website regularly for any changes to the spraying schedule. For an overview of our mosquito control programs, you may view the District video.