Mosquito Control
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Sprays run seasonally, usually starting in early June and wrapping up by October.
Send SPRAY to 888-777 and receive a text message whenever we spray
Text 888-777
Want a phone call or email anytime we spray? Visit our alerts dashboard to learn more.
Visit siouxfalls.gov/alerts
Why we spray
The City of Sioux Falls Mosquito Control Program limits harmful mosquitos that spread viruses like West Nile. South Dakota is the number one hotspot for West Nile in the United States.
Trucks spray low-concentration products in the air, reducing the number of harmful mosquitoes. This allows residents to safely enjoy the outdoors.
When we spray
The Mosquito Control Program monitors the population of harmful mosquitoes. Mosquitos are trapped and tested each weekday. We spray a zone or city-wide if enough harmful mosquitos are found.
To learn what zone you are in, use our Interactive Spray Zone Map. Sign up for text alerts so you know when we are spraying in your Zone.
The Mosquito Control Program aims to spray the recreational trails 1 to 2 times a week throughout the summer, as weather conditions allow. Recreational trails may be sprayed in the evening or morning hours, as mosquito activity is at its peak at dawn and dusk.
We spray at night when the mosquitoes are out, unless it is too cool, too windy or raining. Our team will conduct sprays when the weather is warmer than 55 degrees and wind is less than 15 mph.
The Mosquito Control program utilizes ultra-low-volume (ULV) sprayers that are designed to spray chemical with a swath of 300 feet. For a visual, this would be a football field goal line to goal line. Based on this coverage, trucks will cover an east/west or north/south route through city streets. You may not see the spray trucks drive up and down every street, as the chemical mist will spread across streets for coverage.
The products used in our sprays are specifically formulated for mosquito control purposes and have been proven to present low-risk to people, pets, and the environment. If you have a medical sensitivity or wish to avoid the trucks, please sign up for text alerts so that you can make personal decisions during our control efforts.
About the sprays
The Mosquito Control Program uses safe, industry-tested products. We use the smallest amount of chemicals necessary. The active ingredients are less than a fraction of a raindrop per square foot. The Environmental Protection Agency evaluates our sprays to ensure they do not pose a risk to our community.
If you have questions, read our FAQs or call our Mosquito Control Program at 605-367-8284.
Mosquito Sprayings