Additional Mosquito Pools Found Positive for EEEV and WNV, Spraying of Cicero Swamp Planned

ONONDAGA COUNTY, AUGUST 25, 2023 – The Onondaga County Health Department has been notified that additional mosquitoes collected from traps located in the Cicero Swamp area in the town of Cicero tested positive for virus. A mosquito pool from the Route 298 trap and a pool from the Island Road trap tested positive for Eastern Equine Encephalitis virus (EEEV) and a pool from the Route 298 trap tested positive for West Nile Virus (WNV).  EEEV was found last week in the Cicero Swamp area.  As temperatures remain warm, so will the threat of mosquito bites that can transmit disease. The Onondaga County Health Department urges residents to use personal protection measures when spending time outdoors.

The Onondaga County Health Department is making plans to conduct aerial spraying of the Cicero Swamp and immediate surrounding areas. This proactive measure is an attempt to interrupt the mosquito breeding cycles. Reducing the number of mosquitoes (although it is temporary) can reduce the number of mosquitoes available to transmit the virus to humans. The spraying is scheduled to take place on Monday, August 28, 2023, after 6:30pm, weather permitting. If weather or wind conditions are unfavorable on Monday, the spraying will be conducted on the next appropriate day and will be announced through local news, social media, and other communication channels. Residents in the spray areas will be notified by phone through the 911 emergency notification system.

The designated spray areas are generally bounded on the north by Route 31, on the west by Northern Boulevard, on the south by Taft Road, and on the east by the county line (Chittenango Creek). Roads included in this area are: all or parts of Route 298, Bull Street, Eastwood Road, Island Road, Cicero Center Road, Fergerson Road, Ferstler Road, and Oxbow Road. To view a map of the spraying area, visit:

The pesticide that will be used for aerial spraying is Kontrol 30-30. This pesticide is registered with the Environmental Protection Agency and the New York State Division of Environmental Conservation for this use. A copy of the pesticide label can be found on the Onondaga County Health Department website at A written copy of the label can be provided by calling 315-435-1649.

If you live in the spray area, from 6:30 pm to 10:00 pm on the day of the scheduled spraying, it is recommended that you:

  • Refrain from using any flying camera drones, model aircraft or similar aerial flying products.
  • Stay indoors and keep your windows closed for one hour after the area has been sprayed.
  • Keep your pets indoors if possible.
  • Set your window air conditioners to circulate indoor air. It is safe to use your central air conditioning.
  • Keep outdoor gardens covered and rinse vegetables before eating.
  • Be sure children’s toys, outdoor furniture, and clothes on outdoor clotheslines are brought inside. If toys or clothes are left outdoors, wash each thoroughly with soap and water before using and launder clothes before wearing them.
  • Close your car windows and car vents if you are driving during the spraying.

Onondaga County residents who would like to receive community alerts by wireless phones, text messages, and/or TTY may register for the Hyper-Reach Emergency Notification System through the Department of Emergency Communications—911 Center at Landlines are already included in the 911 emergency notification system.

For more information about spraying and protecting yourself from mosquitoes, visit or call the Onondaga County Health Department at 315.435.1649.