9/26/2025: The Williams County Vector Control District (WCVCD) will conduct ground adulticide treatments in Grenora, Trenton, Williston Spray Block 7, and south Williston (Lake Jessie area), on Saturday, September 27 and/or Sunday, September 28, near sunset, weather and conditions permitting. WCVCD will be using DeltaGard (active ingredient: Deltamethrin), which is approved for use in residential areas. Residents are reminded to maintain a distance of at least 300 feet from Vector Control trucks during fogging operations.
Spray Block Map: https://arcg.is/DvqyS
To avoid mosquito bites, residents are also encouraged to take precautions when spending time outdoors between dusk and dawn such as:
- Wearing long sleeve tight knit shirts and long pants
- Limiting time outdoors between dusk and dawn
- Using a mosquito repellent such as DEET, Picardin, or oil of lemon eucalyptus
- Eliminating standing water on your property
To learn more, please visit the Vector Control website.