Mosquitoes

Avoid mosquitoes in the city by following these tips:

• Limit outdoor activity in the evening, especially at dusk and dawn. That’s when the mosquitoes that spread West Nile virus are most active.
• Use an EPA-approved insect repellent containing DEET, picaridin, IR3535 or oil of lemon eucalyptus.
• Wear protective clothing outside, especially during the evening. Mosquitoes that carry West Nile virus are most active at night and dawn. During the day, avoid dark-colored clothing.
• Do not wear colognes, perfumes and scented body lotions.
• Avoid shaded, bushy areas where mosquitoes rest during the day.

Some people have only mild reactions to mosquito bites, while others can develop swelling, soreness, and redness. You cannot tell from your reaction to the bite whether the mosquito transmitted a germ that can cause a disease.

Prevent infection and reduce discomfort from mosquito bites by following these tips:

• Wash the bite area with soap and water to prevent bacteria from entering into the bite.
• Avoid scratching the bite to reduce the risk of infection and scarring.
• Apply an ice pack for 10 minutes to reduce swelling and itching as needed.
• Reduce itching by:
  • Applying a mixture of baking soda and water.
  • Using an over-the-counter anti-itch or antihistamine cream (follow product directions).

Mosquitoes are attracted to water and lay their eggs in slow-moving and standing water. To make your home less inviting, be sure to:

• Remove standing water on your property. Remove water from:
  • Tires
  • Cans
  • Clogged gutters
  • Unused pools and pool covers
• Change the water in bird baths at least every three to four days.
• Clean and chlorinate swimming pools, outdoor saunas, and hot tubs. Keep them empty or covered when not in use.
• Keep property clean and free of trash, which can collect water.
• Remind and help neighbors to eliminate mosquito breeding sites on their property.
• Use window screens and repair or replace those that have tears or holes.

You can report chronic standing water in private or public locations online or by calling 311. You can report water in the street caused by a street defect or a clogged catch basin online or by calling 311.

• Get Rid Of Standing Water Around Your Home Checklist (PDF)
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Pesticide Use

Treat water that can’t be removed with larvicide, a product that kills young mosquitoes. Use larvicides with the active ingredient Bti. You can find products at your local hardware store. Larvicides should be used only as directed by the manufacturer.

Never use foggers or bug bombs inside the home to control insects. You should also avoid using aerosol pesticides.

Before you travel, visit the CDC Traveler’s Health website to find out what mosquito-related diseases are active in your destination.

If you are visiting areas with a high risk of mosquito-borne illness:

• Place mosquito nets over beds and children’s carriages.
• Wear insect repellent when spending time outdoors. Be sure to wear repellent during the daylight hours and at night to prevent mosquitoes from biting.
• Do not leave windows open. When possible, use an air conditioner. If an air conditioner is unavailable, make sure to use window screens.