Orange County Mosquito and Vector Control District
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Latest News & Alerts

Centers for Disease Control and Prevention (CDC)
CDC Zika Virus Information Page and News Releases

California Department of Health Services (CDPH)
CDPH Zika Virus Information Page
CDPH News Release Page

World Health Organization (WHO)
WHO Zika Virus Information Page
WHO News Release Page

Have You Seen This Mosquito? - Posters

Have You Seen This Mosquito?
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Invasive Mosquito Alert

Invasive Mosquito Alert
Multi-Language - Booklet

The Facts

  • Zika virus is transmitted by Yellow Fever and Asian Tiger mosquitoes.
  • Both species are now found in Orange County.
  • Invasive mosquitoes must acquire the virus from an infected human. Example: Infected traveler returning from an area with active transmission of Zika.
  • The California Department of Public Health acknowledges that the risk of transmission of Zika virus in California is low. Factors contributing to our lowered risk are the use of window screens, air conditioning, and comprehensive mosquito control and education programs.
  • There is no cure for Zika. Mosquito breeding source elimination and bite prevention is the only way to prevent the spread of this virus.
  • The formula is simple: no invasive mosquitoes = no Zika virus transmission.
  • Mosquito control is a shared responsibility. Every resident must redouble their efforts to eliminate ALL standing water from their property, including standing water found indoors.

Please click on one of the links below to view our multi-language Aedes Mosquitoes Booklets

Known Aedes Infestation Areas

Plug in your address the search bar on the top right corner of the map.

If your address falls under a red  shaded area, door-to-door surveillance has been
conducted and Infestations for invasive mosquitoes (Aedes aegypti) have been dectected.

If your address falls under a yellow  shaded area, door-to-door surveillance has been
conducted and infestations for invasive mosquitoes (Aedes albopictus) have been detected.

If your address falls under a green  shaded area, door-to-door surveillance has been
conducted and infestations for invasive mosquitoes (Aedes albopictus and Aedes aegypti) have been detected.

If your address is not shaded, surveys have not been performed in your area. Remain vigilant in making sure you have
no standing water both indoors and outdoors. Discard containers, cans, buckets, and tires around the home.

What are the Invasive Mosquitoes in Orange County?

The two invasive mosquitoes in Orange County are the Asian tiger mosquito (Aedes albopictus), and the yellow fever mosquito (Aedes aegypti).
Asian Tiger Mosquito
Aedes albopictus
Yellow Fever Mosquito
Aedes aegypti

These mosquitoes adapt very well to urban environments (cities). Once introduced, they can thrive in our neighborhoods. While the Orange County Mosquito and Vector Control District is working hard to fight these invasive species, we can’t do it alone. We need your help.

Aedes mosquitoes confirmed in Orange County

Los Alamitos
Mission Viejo
Buena Park
Newport Beach
Costa Mesa
North Tustin
Fountain Valley
Garden Grove
San Clemente
Huntington Beach
Santa Ana
La Habra
La Palma
Yorba Linda
Lake Forest
See latest map of Invasive mosquito activitiy here!

How to Find Them Around the Yard and Inside Your Home

These mosquitoes can live and complete their life cycle either indoors or outdoors. Eggs are laid along the waterline of any water-holding container such as flower vases, plant saucers, buckets, used tires, and even plants that hold water like bamboo or bromeliads. Eggs can remain alive for years, and hatch into larvae when conditions are right.

Look for:

  • small, black mosquitoes with white stripes
  • mosquitoes active and biting during the day — even indoors!
  • immature mosquitoes (larvae and pupae) swimming in stagnant water.
Mosquito Life Cycle

The invasive, black-and-white mosquitoes can lay their eggs individually along the waterline of any container. This reduces the effectiveness of “dump and drain!”

Aedes Life Cycle

How to Protect your Family and Community

  • Report black-and-white, daytime-biting mosquitoes to 714.971.2421 or 949.654.2421. You can also submit an online service request.
  • This FREE service includes inspection and treatment.
  • Remove or drill holes in the bottom of all plant pots, saucers, barrels, bins, and old tires.
  • Do not keep water in buckets or root plant cuttings in water. Sharing plant cuttings can spread mosquito eggs.
  • Cover trashcans, toys and recycle bins, and keep unneeded items out of the rain.
  • Ensure rain barrels are properly sealed. Thousands of eggs can be laid inside rain barrels.
  • Wear insect repellent containing DEET®, Picaridin, IR 3535, or oil of lemon eucalyptus.

Mosquito Prevention Tips & Tricks

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