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The Williams County Vector Control District plans to conduct three separate adulticide treatments between 6/10/25-6/17/25 across the County. Citywide aerial adulticide missions in Williston and Grenora area using Imperium will begin as early as the afternoon of 6/11/25. Ground adulticide mission in Trenton/ Trenton Park area using DeltaGard will begin as early as the night...

The Williams County Vector Control District will be conducting truck mounted adulticide treatments between 6/6/25-6/9/25 in Williston (Spray Block 8). Weather and conditions permitting, treatments will occur near sunset. Find this information and a map of the WVCD Spray Blocks at https://www.williamsnd.com/spray-reports/. Please maintain a distance of at least 300 feet behind Vector Control trucks...

VECTOR GROUND ADULTICIDE SPRAYING NOTICE (5/30/25 Update) Spray Blocks 7 and 8 will be serviced with DeltaGard tonight if conditions allow. _____ WCVCD will be conducting a targeted ground adulticide mosquito spray missions this week, beginning Tuesday night, May 27, weather permitting. (5/27/25) Williston Spray Block 14 is the current target area View the Spray...

5/23/25 In collaboration with the Williams County Vector Control District #1, the United States Air Force Reserve (USAFR) Youngstown Air Reserve Station, 910th Airlift Wing, will be conducting a wide-area aerial larvicide mission over the Missouri River bottomlands. Weather and conditions permitting, the spray will be between May 27 and June 6. No applications will...