The Williams County Vector Control District (WCVCD) will be conducting an aerial application in Grenora on the evening of July 26 or July 27, 2025. The mission will be postponed to a later date if conditions do not allow.
WCVCD will be using the product Imperium for this spray. Imperium contains Deltamethrin as an active ingredient and is approved for residential mosquito control by the Environmental Protection Agency (EPA).
To avoid mosquito bites, residents are advised to take extra precautions when spending time outdoors during the hours of dusk to dawn during the summer months. Wearing long sleeve tight knit shirts and long pants, limiting time outdoors during these times, and using a mosquito repellent such as DEET, Picardin, or oil of lemon eucalyptus are good actions to take to prevent bites. Residents can help prevent mosquito re-population by eliminating standing water on their property.
To learn more, please visit the Vector Control website.