Health Services

Preventing Mosquito-Borne Illnesses

Mosquito-borne illnesses are among the most complex of all infectious diseases to prevent and control. Suffolk County combines specialized epidemiology, ecology and laboratory expertise to respond to the challenges presented by vector-borne infectious diseases.

Mosquitoes: Here you will find information on how, where and when mosquitoes breed and bite, how to avoid being bitten by a mosquito and safe use of repellents. 

Mosquito-Borne Diseases:  Here you will find information about mosquito-borne diseases in Suffolk County, including West Nile virus and Eastern Equine Encephalitis.

Public Health Video: A two-part look at how mosquitoes are captured and tested for mosquito-borne diseases.

The Science of Catching and Testing Mosquitoes – Video (Part 1)

Preparing Mosquitoes for West Nile Virus Testing – Video (Part 2)

How To Stop Mosquitos From Breeding in Your Back Yard – Video (Part 3)

Public Health Information Line: Residents are encouraged to report sightings of dead birds, such as crows, blue jays and hawks that may have been infected with the virus to the Department of Health Services’ Public Health Hotline at 631-787-2200 from 9 a.m. to 4:30 p.m. Monday through Friday. June 1st - September 1st.

Mosquito Control

Mosquito Control Flyer

The Suffolk County Department of Public Works, Division of Vector Control, is responsible for controlling mosquito infestations that are of public health importance. For more information about mosquito spraying, or for an online mosquito complaint form or to learn more about the "No Spray" Law and how to register "No Spray" Law and how to register, visit Vector (Mosquito) Control.

You can help: Please print and share the Suffolk County brochure:

Get the Buzz about Mosquitoes en EspañolGet the Buzz about Mosquitoes Spanish brochure Link

Get the Buzz about MosquitoesGet the Buzz about Mosquitoes brochure Link


Spraying Notices

Vector (Mosquito) Control and Wetlands Management Long-Term Plan

Division of Vector Control 2019 Plan of Work


Additional Resources:

Environmental Protection Agency (EPA): This website contains information about pesticides, health and safety, environmental effects, controlling pests, regulation of pesticides, compliance and enforcement, grants and partnerships, science and policy and more. It also contains a section for kids.

Pesticide Poisoning: If you think you have been adversely affected by a pesticide product contact your medical provider immediately. For information on pesticide poisoning, visit the EPA’s Office of Pesticide Programs or call the NPIC - National Pesticide Information Center at 1.800.858.7378.

Pesticide Regulatory Program:  New York State Department of Environmental Conservation (DEC)