With those pesky mosquitos buzzing around, possibly carrying the West Nile virus, the Upper West Side is scheduled to get a pesticide treatment, according to the city’s health department.
“They’re going to be spraying for mosquitoes,” one worker from the New York City Department of Health and Mental Hygiene (DOHMH) said as she posted fliers earlier this week.

Photo: @uwscornertalk
In an annual effort to “prevent or reduce locally transmitted human cases of mosquito-borne illnesses in the city” such as the West Nile (WN) virus in humans, the city’s health department monitors the larvae and adult mosquitoes in the five boroughs, according to the DOHMH’s Comprehensive Mosquito Control Plan for 2021. In areas where there is WN activity which poses a threat, the city will use adulticides, pesticides used to kill off adult mosquitoes.
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One such sign of the West Nile virus in the area is the presence of dead birds, which have been seen all around the neighborhood recently (residents should call 311 to report any of these sightings). Another factor in the surge in mosquitoes is standing water (water that doesn’t move or flow). Folks should also immediately drain and empty any standing water to prevent mosquito eggs from hatching. The fine for standing water can be as much as $2,000.
Residents are advised to remain inside, close air conditioning vents or use the recirculate function on A/C units during the hours of spraying – which is set to begin on Monday, September 27 at 8:30pm and last until 6am on Tuesday, according to the notices posted all around the neighborhood by Health department workers.

Courtesy of the DOHMH
Last year, there were seven cases of the West Nile virus detected in New York City, including one death, according to the Control Plan. Currently, there is no cure or vaccine for the virus.
We reached out to the Department of Health and Mental Hygiene for more information but have not heard back from them.
Curious if the pesticide is toxic to the air and water. It’s bad enough we have the excessive fumes from park vehicles, out of city and state vehicles, and the overwhelming amount of chemical toxins from construction, making the air more toxic would be quite awful.
The City has sprayed for mosquitoes every year or two for decades – sometimes in a much wider (i.e., more residential) area. Yet I have never heard of anyone being adversely affected. And I think we would know about it, since lawsuits would be filed.
Ian, Do you know anyone who has cancer on the UWS? Do you know what caused it? (I don’t.) Can you prove that this pesticide is 100% safe? Do you know what chemical they were spraying? I used to respect your comments…no more.
Do YOU? Have you heard of a single person who became ill – much less got cancer – from the annual or bi-annual mosquito spraying that had been done?
If not, then what on God’s great earth are you getting to het up about?