Mosquitoes can transmit diseases

With warmer weather, longer days, and increased outdoor activities, a higher risk of exposure to mosquitoes is to be expected. Since mosquitoes can transmit diseases such as West Nile Virus (WNV), St. Louis Encephalitis Virus or Western Equine Encephalitis Virus, the Ventura County Environmental Health Division (Division) is advising the public to take precautions to protect against mosquito bites and assist with the effort to control mosquitoes.

To minimize exposure to mosquitoes, eliminate standing water from your property – no matter how small; make sure doors and windows have tight-fitting screens; when outdoors, wear protective clothing and apply an EPA approved insect repellent containing DEET, picaridin, oil of lemon eucalyptus, Para-menthane-diol (PMD), or 2-undecanone. If water is stored in rain barrels or other containers, cover all openings with tight fitting lids or 1/16-inch fine mesh screen.

The Division monitors and controls mosquitoes at approximately 2,600 mosquito breeding sources throughout Ventura County. However, the Division is asking the public to assist with the mosquito control effort by reporting mosquito activity or potential mosquito breeding sites. Mosquito complaints can be reported to the complaint HOTLINE at 805/658-4310.

Mosquito-eating fish are available to the public for use in ornamental ponds and water features. To request mosquito-eating fish call 805/662-6582. To report dead birds for WNV testing, contact the California Department of Public Health at 877/WNV-Bird (877/968-2473) or visit

The Division also advises the public to be alert for two invasive (non-native) mosquito species that have recently been found in several areas of California. They are Aedes aegypti and Aedes albopictus. These are small, aggressive daytime biting mosquitoes with white stripes on their back and legs. Their eggs can survive during dry months in small artificial or natural containers and can hatch in a teaspoon of water.

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