Alameda County Mosquito Abatement District

11/02/2026

The latest West Nile Virus numbers from CDPH, this has been the most active WNV year in five years.

10/30/2026

If you have tarps laid out for construction or to block rain, you could have space for mosquitoes. Water often pools in tarps, creating a habitat for mosquitoes. We recommend checking tarps every 3 days and removing water. Mosquitoes love finding new places to lay their eggs.

10/29/2026

Are you getting mosquito bites on your ankles? That may be a sign that invasive Aedes aegypti are still active in the area. If you notice bites, call us and let us know! 510-783-7744.

10/27/2026

Noticing mosquitoes in your home yet? This is the time of year they begin to fly in if you have windows or doors open. We recommend updating any ripped window screens, keeping doors closed and looking out for anything flying around inside.

10/22/2026

Our Fall newsletter is out! Learn about our work with Wolbachia treated male mosquitoes in Livermore, our response to aggressive mosquitoes along the marsh, WNV numbers and more:

Since their introduction to California in 2013, they have become established in the Central Valley, Southern California, and in parts of Northern…

10/21/2026

Scary but true, mosquitoes are still around the Bay Area this time of year. When you're out and about, make sure to wear long sleeves, pants and carry insect repellent with you in case the little bloodsuckers try to find you.

10/20/2026

This has been a difficult year with West Nile virus. Throughout California mosquito and vector control agencies have found over 734 birds that have died from West Nile virus. If you find a dead bird, especially a crow, raven, scrub jay or owl, please contact the West Nile hotline so it can be tested for West Nile virus: https://westnile.ca.gov/

10/16/2026

Unfortunately salt marsh mosquitoes known as Aedes dorsalis keep hatching open. Due to the higher and longer lasting tides we have had, along with hot weather and very little wind, these aggressive mosquitoes are finding human blood meals during the day. If you are in a coastal area of Alameda County the next few days, wear long sleeves and long pants, and apply repellent. We will continue to work on preventing future fly offs of these aggressive mosquitoes.
Learn more: www.mosquitoes.org

10/14/2026

Have you seen our wolbachia treated mosquitoes in Livermore? These mosquito releases help interupt the reproductive cycle that leads to more mosquitoes. These treated mosquitoes are helping lower numbers of invasive Aedes aegypti mosquitoes in specific neighborhoods of Livermore. Thank you to the City of Livermore, CA - Government for your support of our efforts to decrease invasive mosquitoes in the city.

10/13/2026

The Alameda County Mosquito Abatement District (ACMAD) has identified one dead bird that tested positive for West Nile virus in the Lakeshore District, between Warfield Ave and Lakeshore Ave. Birds are indicators that West Nile virus is circulating in an area. Look out for mosquitoes and decrease your likelihood of being bit by wearing insect repellent when outdoors, wearing long sleeves and long pants when outside during dawn and dusk, and report any mosquito bites to the ACMAD team. ACMAD staff are working in the area speaking with residents, setting up mosquito traps and treating areas with standing water. Mosquitoes need standing water to complete their life cycle and develop into flying adults. Residents are encouraged to look out for standing water and eliminate any sources whenever possible. If you need assistance with standing water in your yard or elsewhere in Oakland, please contact the Alameda County Mosquito Abatement District at 510-783-7744 or submit a service request online at www.mosquitoes.org.