Mosquito Prevention Tips

Mosquito-borne viruses, such as West Nile and St. Louis encephalitis, are transmitted to people by the bite of an infected mosquito. Anyone who feels unwell the days and weeks after being bit by a mosquito should contact their health care provider. Preventing mosquito breeding and mosquito bites is the best defense against mosquito threats.

Prevent mosquito bites:


  • Avoid going outside at dawn and dusk when virus-transmitting mosquitoes are most active.
  • Apply EPA-registered ingredients such as DEET, picaridin, oil of lemon eucalyptus, or IR3535 to exposed skin and/or clothing (as directed on the product label).
  • Wear long sleeve shirts, long pants, socks, and shoes when mosquitoes are active.
  • Keep window and door screens in good repair to prevent mosquitoes from entering your home.

Prevent mosquitoes around your home:

  • Inspect yards for standing water sources and drain water that may have collected under potted plants, in bird baths, discarded tires, and any items that can hold water.
  • Check rain gutters and lawn drains for water and debris.
  • Clean and scrub bird baths and pet water dishes at least weekly.
  • Scrub new plant containers that may have eggs deposited on the inside walls. Some invasive mosquito species’ eggs can remain viable for months.

What repellent is right for me?

The Environmental Protection Agency (EPA) has an online tool in both English and Spanish to help find the best product for you and your family.

Please contact the District at (760) 342-8287 or online to report mosquito problems, request mosquitofish, and report neglected pools or standing water where mosquitoes breed.

Learn more about repellents in this FAQ.

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