Mosquito Control

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In an effort to control the mosquito population, the City of Katy provides mosquito spraying services. This service is generally provided from May through October of each year, with adjustments due to mosquito increases or inclement weather. Mosquito spraying is normally done once per week, Monday through Thursday. Each part of the City is covered once per week.

For questions regarding this service, email:

What You Can do to Help

To be successful in controlling the mosquito population, we need your help. Mosquito larvae must live in still water for five or more days to complete their growth before changing into adult biting mosquitoes capable of transmitting disease. Often, the number of mosquitoes in an area can be reduced by removing sources of standing water around residences. For example, hundreds of mosquitoes can come from a single discarded tire.

Here are several examples of things you can do to help reduce the mosquito population and eliminate their breeding sites:

  • Get rid of old tires, tin cans, buckets, drums, bottles or any water-holding containers.
  • Fill in or drain any low places (puddles, ruts, etc.) in the yard. The draining and filling of wetlands for mosquito control is not an acceptable approach.
  • Keep drains, ditches, and culverts free of weeds and trash so water will drain properly.
  • Keep roof gutters free of leaves and other debris.
  • Cover trash containers to keep out rainwater.
  • Repair leaky pipes and outside faucets.
  • Empty plastic wading pools at least once a week and store indoors when not in use.
  • Unused swimming pools should be drained and kept dry during the mosquito season.
  • Fill in tree rot holes and hollow stumps that hold water.
  • Change the water in birdbaths and plant pots or drip trays at least once each week.
  • Store boats covered or upside down, or remove rainwater weekly.
  • Keep grass cut and shrubbery well-trimmed around the house so adult mosquitoes will not hide there.
  • Make sure ornamental ponds have fish, which will eat mosquito larvae.
  • Repair window screens.
  • When outdoors in the evening or when mosquitoes are biting, use personal protection measures to prevent mosquito bites such as insect repellent and appropriate clothing.

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