New York City Will Conduct Mosquito Control Next Week
The city will apply pesticide treatments to reduce mosquito populations and the risk of West Nile virus.
Updated on Sept. 18, 2026 in Asthma
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The New York City Health Department will conduct mosquito control operations using truck-mounted equipment during overnight shifts beginning Monday, Sept. 21, 2026. These treatments are scheduled for Manhattan, Brooklyn, and Queens to lower the risk of West Nile virus.
Why it matters
Reducing adult mosquito populations serves as a public health measure to minimize local transmission risks for West Nile virus. The city utilizes this targeted approach to manage mosquito activity during the peak season.
The Health Department will apply the EPA-registered product Duet using specialized truck-mounted equipment. Officials report that pesticide risks for people and pets are low, though sensitive individuals may experience temporary eye or throat irritation.
The players
New York City Health Department
This local agency manages public health initiatives, disease surveillance, and environmental safety programs for all five boroughs.
The details
Operations will take place in overnight shifts to apply the pesticide across targeted areas in Manhattan, Brooklyn, and Queens. The city designated specific dates for each borough, with alternate dates provided in case of inclement weather conditions.
Timeline
Manhattan operations start Monday, Sept. 21, 2026, at 11:30 p.m.
Brooklyn and Queens operations start Wednesday, Sept. 23, 2026, at 8:30 p.m.
The Big Picture
This program aligns with established public safety protocols similar to the National Weather Service's Air Quality Index thresholds. By implementing standardized chemical controls based on seasonal risk, the city manages health hazards to the public in a predictable and regulated manner.
Residents should remain aware of scheduled overnight spraying times to minimize potential exposure to the pesticide Duet. Sensitive individuals may experience temporary eye or throat irritation or a mild rash if they come into contact with the mist during the active treatment hours.
The takeaway
The city recommends residents stay indoors during the scheduled treatment hours to minimize unnecessary exposure to the pesticide. Keeping windows closed when trucks are in the immediate area can help reduce the chance of irritation for sensitive individuals.
What happens next
Manhattan is scheduled for treatment on Sept. 21, with an alternate date of Sept. 22. Brooklyn and Queens are set for Sept. 23, with an alternate date of Sept. 24.
Further reading
Learn more about local respiratory health factors in New York City Asthma.
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