The City uses larvicides and pesticides to control mosquitoes, which can transmit West Nile Virus.
Spraying takes place on scheduled dates from 6:30 PM to 6 AM the following morning, unless otherwise noted on the schedule. For residential areas, the City provides 24 hours or more advance notice of spray events through the media, DOHMH website, 311, and other organizations. In the event of rain or wind, spraying may be postponed.
The Department of Health and Mental Hygiene recommends the following precautions to residents of areas scheduled for spray events:
Residents are not expected to experience adverse reactions to the mosquito sprayings. Some people who are sensitive to pesticides may experience temporary effects such as skin, eye, and mucous membrane irritation, as well as the worsening of conditions such as asthma and other respiratory illnesses if directly exposed to spraying. Anyone experiencing an adverse reaction to pesticides should seek medical help or call the NYC Poison Control Center at (212) 764-7667.
The City does not accept reports of mosquitoes or requests for spraying from the public.