Mosquito Control

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Mosquito Inspections and Surveillance

Site inspections on residential properties are often made to find the source of mosquito invasion.

Some mosquito species deposit their eggs into water holding containers found around the home, and the resulting adult mosquitoes bite. The inspector inspects the yard of the individual complaining, as well as two to three adjacent properties, looking for any type of container that is holding water and breeding mosquitoes.

Miami-Dade County Mosquito Control inspectors and contractors can be identified by the following:

  • Miami-Dade County and contractor co-branded vehicles.
  • Miami-Dade County and contractor co-branded identification cards.
  • Miami-Dade County Mosquito Control shirts or neon vests with "Miami-Dade County Mosquito Control Contractor" written on the back.
Miami-Dade County and contractor co-branded vehicles

When mosquito breeding is found, the containers are emptied, removing the source of the problem. Insecticide may be used to treat large containers, such as swimming pools that are found breeding mosquitoes. Yards are sprayed using portable spray equipment to kill adult mosquitoes.

The often-requested spray truck does little to control domestic mosquitoes and is not used unless migration of adult mosquitoes from the Everglades National Park or Biscayne National Park cause excessive numbers of mosquitoes in the populated areas.

  • Mosquito surveillance

    Mosquito Control experts use a variety of surveillance activities to identify the  type and the amount  of mosquitoes that exist in an area. Some of the methods used:

    • Finding and monitoring places where adult mosquitoes lay eggs and where the larvae will hatch.
    • Tracking mosquito populations and the viruses they may be carrying.
    • Determining if EPA-registered insecticides will be effective.

    If mosquito counts recorded at a trap in the array exceeds a certain level, Mosquito Control inspectors are dispatched to the area to perform inspections and mosquito reduction activities if warranted.

    The surveillance array is another tool being utilized by Miami-Dade County as part of a complete mosquito control program that aims to reduce the mosquito population to protect residents and visitors from mosquito-borne illnesses.

    Traps located at the locations illustrated in the map below are monitored on a weekly basis to assess mosquito counts.

    surveillance map

  • Storm drain treatment program

    Miami-Dade County’s storm drain system is designed to clear the streets and swales of water after heavy rainfalls. When the drains are clean and free of trash and debris, they work quickly and efficiently to prevent standing water on the streets for long periods of time.

    In 2006, due to an increasing number of mosquito breeding complaints related to storm drains, the County began treating storm drains with the larvicides Bacillus thuringiensis israelensis, Bacillus sphaericus and Methoprene. We continue to treat and control larvae regularly in storm drains using these larvicides.

  • Additional resources