Mosquito Control

New Hanover County's coastal environment and mild climate allow for the rapid development of mosquitoes from March through November. While mosquitoes cannot be completely eliminated, it is important to control mosquitoes because they are a known disease "vector," meaning they can transmit some diseases to humans. Even mosquitoes that do not transmit disease can be a nuisance in their biting behavior and, in severe instances, can be detrimental to the county's quality of life.

New Hanover County Mosquito Control uses a variety of prevention and control methods to reduce mosquito populations, including mosquito prevention education, larviciding to target larvae and breeding sites, and ultra-low volume mosquito spraying with EPA-registered pesticides. Learn more in the Mosquito Control Policy (PDF).

Mosquito Spraying

New Hanover County has an automated notification system that sends text messages and/or phone calls to announce mosquito spraying in your area. Alerts are typically sent on the day of spraying.

Sign up for automated alerts about mosquito spraying in your area.

Click here to view the most recent mosquito spray map and schedule (PDF), which is based on mosquito trap counts, weather, and other data, and may be canceled or changed. Spraying takes place in the evening and is weather permitting. There are 29 spray zones in New Hanover County; to find out which spray zone you are located in, check the spray zones map (PDF).


Mosquito TruckSpraying occurs from a Mosquito Control truck.

Mosquito Control collects data from mosquito traps and conducts site assessments across the county to determine where mosquitoes are coming from and how to treat them most effectively based on the species and number of mosquitoes in an area. This helps reduce the amount of pesticides being used and minimizes impact to the environment.

If it is determined that spraying is necessary to control mosquitoes in a specific area, Mosquito Control notifies the public through the Public Health website and the county's automated notification system.

When spraying for mosquitoes, NHC Mosquito Control:

  • Uses ultra-low volume (ULV) sprayers with a range of roughly 300 feet
  • Uses EPA-approved pesticides at minimum application rates - the small, low-volume pesticide droplets degrade rapidly, leaving little or no residue
  • Sprays in the evenings and at night when mosquitoes are most active
  • Does not spray when winds are above 10 mph to maintain control of treated areas

Spray Exclusion Form

To have your property excluded from mosquito spraying, complete and submit a mosquito spray exclusion form (PDF). After submitting the form, Mosquito Control staff will call annually to verify your information is up to date. Mosquito spray exclusion forms must be resubmitted every five years.


CDC Mosquito Control Truck Spraying Fact Sheet

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