Cache Mosquito Abatement District (CMAD)


In our district, the Culex pipiens mosquito likes man-made water pools and carries West Nile virus.

Additional Resources

The policies adopted by the Board of Trustees may be found here.

WNV found in CMAD Mosquitoes

Mosquito pools from Wellsville, Mendon, Hyrum, and Benson (trapped on August 14th) tested positive for West Nile Virus. WNV was also confirmed in Logan and numerous areas throughout the state (Box Elder, Davis, Magna, Salt Lake area, Tooele, Uintah, and Weber). This is the peak period for WNV so please wear long-sleeved shirts and pants and use an approved insect repellant when outdoors between dusk and dawn when the Culex mosquitoes are active. Fight the Bite!

Seven human cases have been identified in Utah this season. Four people contracted the more serious neuroinvasive disease, and one has died. From the Utah Department of Health: "Most people with WNV may not know they have been infected. About 20 percent of people infected with WNV will develop West Nile fever, a mild illness that lasts 3–6 days and is characterized by fever, headaches and body aches. Less than 1 percent of people infected will develop West Nile neuroinvasive disease, which can result in high fever, neck stiffness, disorientation, coma, tremors, muscle weakness, convulsions or death. Symptoms of WNV infection usually appear within 3 to 14 days after exposure. There is no specific treatment for WNV infection other than to treat symptoms. If you think you have WNV infection, contact your health care provider."

Horses are also at risk for WNV; as of August 18, three horses tested positive. There are approved vaccines for horses that are to be given in the spring before the mosquito population peaks. Check with your local veterinarian on the recommended vaccination schedule.

Symptoms that a horse infected with WNV may exhibit include lack of coordination and stumbling (most common), depression or apprehension, anorexia (off feed), weakness of the hind limbs, falling down, inability to rise, flaccid paralysis of the lower lip (droopy lip), muscle twitching, grinding teeth, inability to swallow, head pressing, colicky appearance, aimless wandering, hypersensitivity and excitability, excessive sweating, disorientation, convulsions, and possible total paralysis. Call your veterinarian immediately if you see these signs in your horse; prompt treatment may be life-saving. About two out of every three infected horses will survive and likely fully recover.

West Nile Virus (WNV)

West Nile Virus is a disease transmitted by the bite of Culex species of mosquito. The first human case in Utah for this season was confirmed August 16th in Utah county. The Utah Department of Health Bureau of Epidemiology provides information on WNV for the general public, media, medical personnel, and others. Click here for a fact sheet on WNV in Utah.

Mosquito Abatement

Abatement activities (fogging at night, larviciding during the day) continue throughout the District due to the warm temperatures. Click here for the fogging schedule. Please call (435) 764-6839 to report mosquito problems.

Zika Virus

We provide this information as a public service. The CDC (Centers for Disease Control) has a dedicated site with current information on Zika travel alerts, precautions, latest research and more; please click here for more information.

District Information

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. In Logan, please contact Rex Davis at (435) 716-9749. For the College-Young Ward area, please contact Brad Tolman at (435) 755-5733. For River Heights or Paradise, please contact your local councils.


The Cache Mosquito Abatement District (CMAD) was approved by voters in 12 communities and the county unincorporated area on the November 2004 ballot. Since then, four more communities have requested (and been granted) annexation into the District. The College-Young Ward area and Logan City maintain their own mosquito abatement programs. For more on the history of Cache MAD, click here

Contact information for the Cache MAD can be found at the bottom of this page.