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April 13-19, 2025, is California Mosquito Awareness Week. During this important week, the Contra Costa Mosquito and Vector Control District (District) is working to educate Contra Costa County residents about the dangers of mosquitoes — the most dangerous animal on the planet.
According to the Centers for Disease Control and Prevention (CDC), mosquito-transmitted viruses are a major cause of illness and death worldwide. As a public health agency, since 1927, the District's mission is to protect the community from mosquitoes and other vectors of disease. And in two years, the District will have been protecting public health for 100 years.
This week's goal is to raise awareness about the importance of mosquito control, mosquitoes, and the diseases they can transmit. In Contra Costa County, where there are 23 established species of mosquitoes, two of those species are efficient at transmitting West Nile virus. As our temperatures continue to warm, we are likely to see mosquito activity increase, so the time is now to take steps to protect yourself, your family, and your neighbors from mosquitoes and mosquito bites.
The most important thing Contra Costa County residents can do to prevent mosquitoes is to dump out any amount of standing water at least once per week. As mosquitoes grow from egg to adult in water, by removing water, you remove locations that can produce mosquitoes.
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