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CR 11 Closure - 8/3/2025

Effective Sunday, 8/3/25, Williams County will be closing county road 11 (129th Ave NW) from Hwy 2 going north 4 miles to county road 10 (68th ST NW) for construction. Detour signs will be in place. This road will be closed until further notice.

Taxable Valuations

Williams County Taxable Valuations Preliminary taxable valuations, as of July 30, 2025, for taxing districts in Williams County are provided below. Taxable valuations are used to determine the mill rates for property tax statements. For more information about property taxes, visit the Property Tax Basics webpage. Please contact the Finance Department with any questions. Williams...

Aerial and Ground Adulticide Treatments | Southwestern Williams County | WCVCD | 7/31/25 - 8/1/25

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...

Effective 8:00am (CST) 7/29/25 Rain Restriction Update

Effective 8:00am (CST) - this morning, 7/29/25 - rain restrictions in all zones will go back to "by legal weight" unless otherwise posted. Effective 7:00am (CST) today, Monday, 7/28/25 - all Williams County and Township gravel and chip seal roads in all zones (1, 2, 3, 4, 5 & 6) will be restricted to...

Effective 7-26-2025 - (10:45AM CST) Rain Restrictions Lifted

7/26/2025 - Effective Immediately – (10:45AM CST) – Rain Restrictions in ALL ZONES for the County, Township gravel and chip seal roads will be lifted, and will go back to “By Legal Weight” unless otherwise posted. ***** Effective immediately, 8pm (CST), 7/25/25, all Williams County and township gravel and chip seal roads in "Zones 4,...

Aerial Adulticide Treatments | Grenora | WCVCD | 7/26/25 - 7/27/25

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...

Ground Adulticide Treatments | Trenton and Williston | WCVCD | 7/24/25

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...

Update - 77th St NW (108th- 110th Ave NW) Re-Opened

Effective 8/1/2025 at 10:00AM (CST), South Meadow Township has re-opened 77TH ST NW (108TH AVE NW to 110TH AVE NW) west 2 miles for travel. The repairs have been completed. ***** Effective 7/23/25 at 9:25AM (CST), South Meadow Township will be closing 77th St NW (108th Ave NW to 110th Ave NW) west 2 miles...

Aerial Adulticide | Williston | WCVCD | 7/16/25 - 7/19/25

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...

USAFR Aerial Adulticide Spray | Williston | WCVCD | 7/15/25 -7/17/25

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...

Aerial Adulticide | Williston | WCVCD | 7/12/25 - 7/14/25

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,...

Multiple Adulticide Missions | Trenton and Ray | WCVCD | 7/10/25 - 7/12/25

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...

Effective 7/10/25 - 128th Ave NW Road Closure

Effective 11:00am (CST), 7/10/25, Ellisville Township is closing 128th Ave NW for 1 mile – from 76th St NW north to 77th St NW. This road will be closed until further notice.

Ground Adulticide Mission | Blocks 7 and 8 | WCVCD | 7/9/25- 7/11/25

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...

Ground Adulticide Mission | Trenton & Williston | WCVCD | 7/8/25

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...

2024 PREA Annual Report

2023 PREA Annual Report

Ground Adulticide Mission | Williams County | Wildrose | WCVCD | 7/1/25

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...

Ground and Aerial Adulticide Missions | Williams County | WCVCD | 7/1/25-7/5/25

The Williams County Vector Control District (WCVCD) will be conducting both aerial and ground mosquito control applications across the county during the week of July 1, 2025, weather permitting. If conditions do not allow, applications will be rescheduled for a later date to ensure safety and effectiveness. Target areas currently include Trenton and Williston, with...

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