Invasive Aedes aegypti, the yellow fever mosquito, in Alameda County

Aedes aegypti, known as the yellow fever mosquito, is an invasive species native to Africa and it is a growing concern in many California counties and communities. First discovered in 2013 in Fresno, Madera, and San Mateo counties, Aedes aegypti is now found in at least 28 counties in California. Since 2024…

Solutions for Mosquito Problems around your Home

West Nile Virus

West Nile virus entered California in 2003 and Alameda County in 2004. Since its introduction, activity has been detected every year. West Nile virus is a potentially serious disease and proper precautions should be taken to prevent infection.

Mosquito-Like Insects

There are many insects that resemble mosquitoes. Sometimes what appears to be a mosquito is actually another type of insect. Below are the insects most commonly mistaken for mosquitoes...

Technology and Innovation

Our District strives to protect public health and the quality of life in Alameda County by effectively and efficiently managing the risks from mosquitoes and mosquito-borne disease.

Mosquito Biology

Find out more about the life cycle, local mosquitoes in Alameda County, and the species located in California.

Our Mission

Alameda County Mosquito Abatement District is committed to improving the health and comfort of Alameda County residents by controlling mosquitoes and limiting the transmission of mosquito-borne diseases.

Services

We provide services including addressing mosquito issues, providing mosquitofish, identifying insects, and inspecting standing water.

Local Mosquitoes

There are over 2500 different species of mosquitoes throughout the world, of which, 150 species occur in the United States, 53 species occur in California, and 22 species occur in Alameda County.

Staff

Trustees

Calendar

Twitter

Facebook

Instagram

Swimming Pool Notices

If you have received a notice about your pool click here for more information.

A person with a stick is standing by a small water feature, possibly cleaning or inspecting it in a lush green park setting.

See It, Report It

Noticing any mosquito bites or standing water in your neighborhood? Be a great neighbor and let us know. We can have District staff come to your home and help - at no charge.

Report a Dead Bird

Report online or call 877-WNV-BIRD (877-968-2473).

The image highlights common mosquito breeding areas at home, like standing water, pots, and containers.

Backyard Checklist

Mosquitoes need standing water in order to lay their eggs and develop. What most people don’t realize is the surprising number of areas around their own house where mosquitoes can find the standing…

Life Cycle

All mosquitoes must have water to complete their life cycle. This water can range in quality and it can be in any container imaginable. Adult mosquitoes show a distinct preference for the type of…

A close-up of a mosquito perched on green grass, showcasing its features against a natural background.

Mosquito-Like Insects

There are many insects that resemble mosquitoes. Sometimes what appears to be a mosquito is actually another type of insect. Below are the insects most commonly mistaken for mosquitoes...

Board of Trustees Regular

Most Recent Agenda