Mosquito Control

The Ballwin Public Works Department will resume its annual attack on mosquitoes on May 15, 2023. It ended September 15, 2023. Fogging will begin at 8:30 p.m. when the adult mosquitoes are most active. The entire City will be fogged on a weekly basis.  Wards not fogged due to rain, excessive wind speed, or holidays will not be fogged that week. The following schedule will be followed:

Mondays – Ward 1 (click here for map)

Tuesdays – Ward 2 (click here for map)

Wednesdays – Ward 3 (click here for map)

Thursdays – Ward 4 (click here for map)

Fridays – No fogging 

An EPA-approved, water-based “Aqua Kontrol 30-30" is the insecticide ejected into the air to kill flying adult mosquitoes.  The City's licensed operators are Certified Public Operator Applicators by the Missouri Department of Agriculture. 

St. Louis County Department of Health has compiled suggestions to reduce mosquito populations.  For more information visit their website at, the Centers for Disease Control at, or the National Pesticide Information Center at

If you have a bee hive, please call the Ballwin Public Works Department. The streets that we know have bee hives will be fogged at a later time, once bees have returned to their hive.