Mosquito Spraying FAQ’s

What insecticide is sprayed at night by the Reed Township Mosquito Abatement District trucks?

How are adult mosquitoes controlled?
Reed Township Mosquito Abatement District uses truck-mounted fogging units to apply insecticides as an ultra-low-volume (ULV) spray. ULV spray units dispense very fine aerosol droplets (fog) that stay aloft and kill mosquitoes on contact. The amount of insecticide sprayed by ULV units is small compared to the area treated, usually about 3 to 5 ounces per acre, which minimizes exposure and risks Fogging Truckto people and the environment.

Why do you fog for mosquitoes in the evening?
The best time to kill adult mosquitoes by fogging is at dusk, when they are most active and looking for food (mosquitoes feed on human or animal blood). The aerosol fog primarily targets flying mosquitoes, which is why the timing of the spray is critical.

How long does the fog kill mosquitoes?
During the fogging, flying mosquitoes within the treated area are killed. Although the local mosquito population is reduced for a few days, fogging does not prevent mosquitoes from re-entering the area.

Will local officials notify me before fogging?
There is no law in Illinois that requires local governments to notify citizens before fogging for mosquitoes. However, we can notify individuals who request notification before fogging begins. To be notified of fogging, please e-mail us at:

What kind of areas do mosquitoes breed in around the home?
Artificial ponds, bird baths, clogged gutters, old tires, buckets, containers able to hold water, pool cover with standing water, new house construction with flooded basement, tree holes, any depressions in the ground capable of holding water, and lawn catch basin.

Where can I get more information on West Nile virus?
Illinois Department of Public Health

For more information visit:
Illinois Department of Public Health
United States Environmental Protection Agency