Cache Mosquito Abatement District (CMAD)

West Nile Virus Confirmed in Cache Mosquitoes

Mosquitoes that carry West Nile Virus (WNV) were trapped in several areas of Cache County (Amalga, Benson, Logan, Mendon, and Nibley). WNV has also been found in mosquitoes from Box Elder, Carbon, Davis, Duchesne, Salt Lake, Uintah, Utah, and Weber mosquito abatement districts. As of September 11th, 22 people have contracted WNV with one death as a result.

Please be aware of the importance for personal protection when outside. The mosquitoes that carry WNV are active from dusk to dawn. Wear long sleeves and pants and use an approved mosquito repellent Also, drain any standing water to remove breeding habitat for the mosquitoes.


Our field workers continue to check standing water for mosquito larva and treat it when larva are found. They work during the day, Monday through Friday.

Fogging to control adult mosquitoes will continue as conditions permit: breeze between 1 and 10 mph, air temperature above 55 F, and no rain. The time of night that the fogging truck passes your place may vary week to week as sometimes the fogging starts at point A while other times it will begin at point M. This is done so that we may catch adult mosquito activity at its peak in each area at least a few times each month. Please call (435) 764-6839 to report high mosquito numbers in your area.

We use GIS (Geographic Information System) to track where we find mosquito larva, what compound we use to treat the standing water, and to record the results when we check back (larval growth stopped, larva dead, etc.). All of our foggers are equpipped with a GPS chip to not only track our route but to also gather information on the application rate, speed of the vehicle, and to stop fogging when we reach those properties that have requested no spraying (fogging). The foggers are calibrated to deliver a consistent droplet size at various travel speeds up to 20 mph. All of our workers are licensed by UDAF (Utah Department of Agriculture and Food) to apply pesticides.

  • Monday: Petersboro, SW Smithfield, Lewiston, Nibley, Millville, Amalga Flats
  • Tuesday: Mendon, Benson, Hyrum, Avon, Smithfield
  • Wednesday: Wellsville (sewer ponds, Heritage Center, Gun Range), Amalga, Trenton, Cornish, Richmond, Cove, NW Smithfield, Newton, Cache Junction
  • Thursday: Wellsville, Mt. Sterling, Benson, Providence, Hyde Park, North Logan, Clarkston

Courtesy No-Spray Requests

When possible, the District will try to honor courtesy no-spray requests. Please submit a request in writing in order for us to plan routes and accommodate no spray requests. Click here to read this policy. Click here to obtain the fillable form to complete and submit to CMAD. The request must be submitted EACH year.

If you live in Logan or College-Young Ward, please contact your local abatement personnel, NOT Cache Mosquito Abatement District, for fogging schedules, no spray requests, etc.

The District is divided into areas generally identified by the community each is around; these names are what appear in the fogging schedule.