In response to West Nile virus (WNV) positive mosquito samples from
unincorporated portions of southeast and southwest** Tarrant County
(76140 and 76008 ZIP code areas), Tarrant County Public
Health will be ground spraying in these locations, weather permitting,
on Sunday, Monday, and Tuesday,** September 20th, 21st and 22nd
** between the hours of 9 p.m. - 5 a.m. after all appropriate
resident notifications have been completed.
So far this season, 3,614 mosquito pool samples have been tested, with 561 of these WNV-positive samples from the Tarrant County region. Twenty-six of these positive results are from traps set over county boundary lines from municipalities located in Tarrant County.
Public Health's interactive map
provides locations and details as to when and where ground spraying
for mosquitoes will occur or took place in Tarrant County.
here for more detailed information about West Nile Virus,
including weekly reports, as well as tips and videos explaining how to
Be Mosquito Free.
Before any ground spraying takes place, Tarrant County Public Health (TCPH) always recommends residents and individuals take personal measures to protect themselves and eliminate mosquito breeding on their property.
Each municipality in Tarrant County is responsible for mosquito
abatement (control toward reduction) within their city limits.
TCPH is responsible for mosquito abatement within the unincorporated areas of Tarrant County.
TCPH works with the municipalities to monitor mosquito activity and offers mosquito control recommendations; although the decision to start/stop any mosquito control activity is given by the governing body of the each municipality.
Most Tarrant County municipalities monitor and trap for mosquitoes with traps TCPH provides free of charge. The trapped mosquitoes are brought to TCPH where the mosquitoes in each trap are sorted, or "pooled" (separated out by species), and tested for the presence of West Nile Virus (WNV) and other mosquito-borne diseases. When a WNV-positive pool is found, TCPH will notify the respective municipality.
TCPH will adulticide (treat for adult mosquitoes) in the
unincorporated area where disease in the trapped mosquito pools are
TCPH does not adulticide for nuisance mosquitoes, however TCPH will treat ANY source containing mosquito larvae with various types of larvicide (treatment for larval mosquitoes).
TCPH may adulticide for multiple consecutive nights if it is determined that there is an elevated risk to humans (for instance: multiple positives pools in the same area and confirmed human cases of WNV).
TCPH will larvicide if mosquito larvae is present and no natural
predators are found within the body of water.
TCPH has an integrated pest management (IPM) policy for treating mosquitoes. The IPM was developed using best practice recommendations from the Texas Department of Agriculture, the Texas Department of State Health Services and the U.S. Centers for Disease Control and Prevention (CDC). The IPM outlines how each TCPH control measure activity is initiated, tracked and recorded, assuring TCPH uses the least amount of chemical to effectively reduce the mosquito population.
TCPH currently employs six Texas Department of Agriculture-licensed personnel in the mosquito abatement program.
TCPH may contract with local businesses to assist with the task of ground spraying. These contractors are awarded based on criteria established by TCPH during the bidding process that follows TCPH IPM. The criteria do include but are not limited to, proof that all personnel are properly licensed to apply insecticides used for mosquito control, and the company is required to provide location, time, date and rate of each application to TCPH.
Public Health hires contractors as needed for ground spraying. They generally use a pesticide that includes permethrin as the active ingredient. We are currently treating unincorporated Tarrant County with either permthrin (Aqua Perm 30 30) or sumethrin (Anvil 2 + 2).
Be aware that each municipality that has its own spraying equipment may use different pesticides.
In situations where large scale aerial spraying is
necessary, the FDA and EPA-approved chemical Dibrom (also known as Naled) is
Tarrant County Public Health's phased response guidelines for mosquito-borne diseases are modeled after the CDC's phased response guidelines for mosquito-borne diseases and may include other applicable community procedures. All actions are subject to change without notice due to organizational priorities, weather or other unforeseen circumstances.
Arboviral Surveillance and Mosquito Control
A “vector” is an animal that can carry and transmit a disease to another animal. A mosquito is considered a vector of concern because a mosquito can carry and transmit diseases to humans. More on vector control.
County Telephone Operator 817-884-1111
Tarrant County provides the information contained in this web site as a public service. Every effort is made to ensure that information provided is correct. However, in any case where legal reliance on information contained in these pages is required, the official records of Tarrant County should be consulted. Tarrant County is not responsible for the content of, nor endorses any site which has a link from the Tarrant County web site.
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