Mercer County, NJ
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Mosquito Spraying Schedule
Adulticide applications (spraying) are conducted when biting adult mosquito populations exceed public health or nuisance thresholds. These applications are conducted via truck-mounted, ultra-low-volume (ULV) cold aerosol sprayers during late evening or early morning hours. Mercer County applies products (adulticides) recommended by Rutgers University for mosquito control in New Jersey, and a complete list with accompanying labels, SDSs and fact sheets can be found here. Specific street addresses are not published, but adulticide applications are conducted on an area-wide basis and targets where adult mosquito populations may be concentrated during application times. For further questions or information, please browse our website or call/email directly.
The office maintains no regular “spraying schedule” or "spraying list."
These applications are only conducted when deemed absolutely necessary, and under the appropriate environmental conditions, in order to bring mosquito populations to tolerable levels or to ward off potential mosquito-borne disease outbreaks.
(Weather Permitting)
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No adult control operations scheduled at this time.
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Aerial Mosquito Larviciding Notice
When: Monday, June 1, 2026, between 6:00 a.m. and sunset (weather permitting).
Rain Date: Tuesday, June 2, 2026
Mercer County Mosquito Control will be conducting aerial larval mosquito control operations throughout the county by way of helicopter. Due to the size and inaccessibility of many mosquito breeding habitats, these areas are routinely treated when mosquito larvae are present in the standing water.
Residents may observe our helicopter flying at low altitudes near residential areas while positioning to approach nearby treatment sites.
PLEASE NOTE: THIS IS NOT an area-wide adult mosquito control (“mosquito spraying”) operation.
Aerial larviciding involves the use of Bti-based, target-specific, biorational granules applied directly over standing water to help prevent larval mosquitoes from developing into biting adult mosquitoes.
Aircraft Information:
Make/Model: Bell OH-58
Tail Number: N653HA
Paint Scheme: Gray with blue and red striping
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