9/9/25 The Williams County Vector Control District (WCVCD) will be conducting both ground and aerial adulticide treatments between September 9 and September 14, 2025. Weather permitting, treatments will occur after sunset. The WCVCD is planning ground adulticide applications across Ray and Trenton using DeltaGard, which has the active ingredient Deltamethrin. Separately, planned aerial sprays will … Continued
8/19/25 The Williams County Vector Control District (WCVCD) is planning to conduct ground spray adulticide treatments across several cities this week between Tuesday, August 19 and Sunday, August 24, 2025. WCVCD will be conducting these applications across Grenora, Ray, Williston and Trenton using Zenivex and DeltaGard products. Weather permitting, all treatments will occur after sunset. … Continued
8/15/25 The Williams County Vector Control District (WCVCD) plans to conduct ground ULV mosquito control treatments in both Ray and Grenora after sunset on Friday evening (8/15/2025), weather permitting. For these missions, WCVCD will use Deltagard which has an active ingredient Deltamethrin. This product is approved for residential mosquito control by the Environmental Protection Agency … Continued
8/12/25 The Williams County Vector Control District (WCVCD) will be conducting both ground and aerial adulticide treatments between August 12 and August 13, 2025. The WCVCD is planning ground adulticide applications across Grenora, Ray, Williston’s Block 8 and in South Williams County (west of Lake Jessie). In Ray and Grenora, WCVCD will be using Zenivex, … Continued
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 August 5, 2025 and August 8, 2025, if weather and conditions allow.The large military aircraft will be flying at low elevations during the mission. Treatments will take place … Continued
8/5/25: The Williams County Vector Control District (WCVCD) will be conducting ground adulticide treatments in Ray, Grenora, and Trenton after sunset Tuesday, August 5, 2025, weather and conditions permitting. If conditions do not allow, the treatments will be rescheduled for Wednesday, August 6. Ground adulticide applications will take place in Ray and Grenora using Zenivex, … Continued
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
