7/30/25: The Williams County Vector Control District (WCVCD) will be conducting both aerial and ground applications this week between July 31 and August 1, 2025. The aerial sprays are planned to treat Williston, Trenton and Grenora. WCVCD will be using the product Imperium for aerial portion. Imperium contains Deltamethrin as an active ingredient. Due to … Continued
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 … Continued
The Williams County Vector Control District (WCVCD) will be conducting ground adulticide treatments in Williston, Trenton, and the South River Zone after sunset on Thursday, July 24, 2025. WCVCD will conduct a ULV treatment targeting Williston’s Spray Blocks 8 and 10 using the product DeltaGard (which has an active ingredient of Deltamethrin). The district will … Continued
7/15/25 Weather permitting, the Williams County Vector Control District (WCVCD) will conduct aerial adulticide mosquito control treatments in Trenton and surrounding outlying areas between July 16 and July 19, 2025. For effectiveness, treatment may be rescheduled if conditions do not allow. To avoid mosquito bites, residents are advised to take extra precautions when spending time … Continued
7/11/25 In collaboration with the Williams County Vector Control District (WCVCD), the United States Air Force Reserve (USAFR) will be conducting an aerial spray mission over Williston between July 15, 2025, and July 17, 2025, if weather and conditions allow. The public may see a large military aircraft flying at low elevations in the evening … Continued
7/11/25 The Williams County Vector Control District (WCVCD) will be conducting targeted aerial adulticide treatments in the Williston area between July 12 and July 13, 2025. Spray Block 8 is scheduled for a buffer spray treatment on July 12, and the Williston Research Extension Center is scheduled between July 12 and July 13. Weather permitting, … Continued
The Williams County Vector Control District (WCVCD) plans to conduct ground and aerial adulticide treatments across the County between July 10 and July 12, 2025, weather permitting. Ground adulticide applications using DeltaGard are scheduled for the evening of Thursday, July 10 (tonight) in Trenton and Ray. An aerial adulticide application using Imperium is planned for … Continued
Williams County Vector Control District (WCVCD) plans to conduct a ground spray in Williston’s Spray Blocks 7 and 8 after sunset between 7/9/25 and 7/11/25. The missions will be postponed to a later date if conditions do not allow. To view the Spray Block map, click here: https://arcg.is/1bGqGS1 Zenivex E20 will be used in Block … Continued
Williams County Vector Control District (WCVCD) plans to conduct a ground spray in Trenton and Williston’s Spray Block 3 after sunset tonight (July 8). The mission will be postponed to a later date if conditions do not allow. To view the Williston Spray Block map, click here: Spray Block map here: https://arcg.is/1bGqGS1 DeltaGard will be … Continued
The Williams County Vector Control District (WCVCD) will conduct a ground ULV (Ultra-Low Volume) mosquito control spray in the community of Wildrose on the evening of Tuesday, July 1, 2025, weather permitting. The application will take place after sunset to target adult mosquito populations. The product being used for this operation is Zenivex, which is … Continued
