Update: Final ULV spraying will take place October 15-16. Click here for more information. 

Durham, NC - Durham County Department of Public Health will be conducting truck-mounted ultra-low volume (ULV) mosquito control spraying during the evening and early morning hours of October 6 and 7 in the following areas:

• Targeted areas: Trinity Park neighborhood and areas approximately one mile north, south, east and west. South of Stadium Heights, east to Colonial Village, Duke Park, and Old North Durham. South to HWY 147 and west to Old West Durham and Watts Hospital – Hillandale up to Interstate 85.  This area is being targeted following confirmation of West Nile virus in the area. 
• Date: Monday, October 6, and Tuesday, October 7, 2025
• Time: Approximately 10:00 PM to 3:00 AM

 

About the treatment

The product being used is ReMoa Tri, an EPA-registered insecticide specifically labeled for controlling adult susceptible and pyrethroid-resistant mosquitoes. The spray is applied in a fine mist and targets adult mosquitoes when they are most active during the cooler evening hours. The low application rate of less than one ounce per acre minimizes risk to people and the environment.

 

Public safety precautions 

While the spray is applied at a low concentration, posing low risk to people and pets, we advise residents to take the following precautions during the application:

• Stay indoors during the spray application in your area and for at least 15–20 minutes afterward. 
• Keep windows and doors closed. Turn off window-unit air conditioners or set them to "recirculate" mode. Central air conditioning units, which do not draw in outside air, can remain on.
• Bring pets inside and cover ornamental fish ponds to avoid direct exposure.
• Rinse any homegrown vegetables thoroughly with water just as you normally would before cooking or eating them.
• Avoid contact with outdoor surfaces that are still wet from the spray. If contact occurs, wash exposed skin with soap and water.

 

Important information

• Health concerns: Individuals with chemical sensitivities or pre-existing health conditions that may be aggravated by the spray should consult their physician with any concerns.
• Bees and other pollinators: We will attempt to stop spraying when approaching bee keeper properties, and spraying at night helps further reduce impact to bee populations, as bees are generally in their hives at these hours and protected from the applications.

For more information about West Nile virus, visit the NCDHHS website here or the CDC website here. 

Learn more about preventing mosquito bites on the CDC website here.