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How We Control Mosquitoes

Integrated Mosquito Management

Integrated Mosquito Management (IMM) uses multiple methods together for long-range, environmentally responsible mosquito control. Rather than relying on a single approach, we combine surveillance, prevention, biological controls, and targeted treatment based on what the data tells us.

How IMM Works:

  1. Surveillance — We identify mosquito species and track larval and adult population levels throughout Salt Lake City. This drives every decision that follows.
  2. Physical Control — Where practical, we modify breeding sites, manage water sources, and reduce mosquito habitat directly.
  3. Biological Control — We stock ornamental ponds with Gambusia affinis (western mosquitofish), a natural predator that reduces larvae without chemicals.
  4. Chemical Control — When other methods aren't sufficient, we apply pesticides to specific breeding areas or adult populations. It's targeted, not blanket.
  5. Aerial Operations — The SLCMAD has an aerial operations program that includes unmanned aerial systems (UAS, or drones) and a helicopter. These are primarily used for larval mosquito control treatments (larviciding) and surveillance of mosquito habitat. These applications are conducted over rural wetland areas and are not conducted over residential areas.
  6. Education — We work with the public to reduce breeding sites at the source.

Why Mosquito Control Matters

Salt Lake City has abundant water sources near homes and businesses — ideal mosquito habitat. Without active control, mosquito populations would make outdoor life uncomfortable and increase disease risk.

This is a maintenance program, not an eradication effort. The goal is reducing mosquito populations to a tolerable level while protecting the environment — striking a balance that allows comfortable, healthful human existence.

Our Focus: Larvae First

We prioritize larval control because:

  • Larvicides target mosquito biology specifically, with minimal impact on other aquatic life
  • Treating breeding sites is more effective than pursuing flying adults
  • Control stays localized, reducing environmental footprint
  • Adult mosquito control is used only when surveillance data shows it's necessary for public health.