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Mosquito & Vector Control

Mosquito The Mosquito and Vector Control Program protects public health by controlling mosquitoes and other vectors that spread disease.

Mosquitoes, ticks, and rodents are not only a nuisance, but are a major threat to public health. This Program control vectors and nuisance pests using effective and environmentally sensitive methods to control disease vectors and nuisance pests, and reduce the risk of vector-borne diseases such as West Nile virus and plague.

Click here to learn more about the Mosquito & Vector Control Program.

What is a Vector?

A vector is any insect or arthropod, rodent or other animal of public health significance capable of harboring or transmitting the causative agents of human disease (such as West Nile virus and malaria). Under certain circumstance insects, arthropods and other animals capable of causing direct human injury or discomfort, but not disease, are sometimes referred to as vectors.

Inspection Reports

To view our vector control inspection reports, click here to visit our DEHS Customer Service Portal. Click on “View All Inspections” and search by city or facility name, and permit type (Poultry Ranch or Riding Academy).

To receive links to our inspection reports by email, register for an account. As a registered user, you can receive notification emails when inspection reports for a specific facility are published. You will also have online access to follow-up information related to any complaints you submit. Inclusion is our mailing list is FREE and you can opt out at any time by clicking the “Unsubscribe” link in the footer of our e-mail messages.

Neglected Swimming Pools (Green Pools)

Please click here for more information about green pools.

West Nile Virus

Please click here for more information about West Nile Virus.

Please click here for a list of frequently asked questions about West Nile Virus.

Yellow Fever Mosquito (Aedes aegypti) and Asian Tiger Mosquito (Aedes albopictus)

Two invasive (non-native) mosquito species have recently been found in several California cities and there is a potential for them to spread into other areas of California. They are named Aedes aegypti (the yellow fever mosquito) and Aedes albopictus (the Asian tiger mosquito). Unlike most native mosquito species, Aedes aegypti and Aedes albopictus bite during the day. Both species are small black mosquitoes with white stripes on their back and on their legs. They can lay eggs in any small artificial or natural container that holds water.

Click here to visit the California Department of Public Health for more information about Aedes aegypti and Aedes albopictus mosquitoes.


Zika virus is transmitted by Aedes aegypti mosquitoes (yellow fever mosquitoes) and Aedes albopictus mosquitoes (Asian tiger mosquitoes). These mosquitoes are not native to California. However, since 2011 they have been detected in several California counties. An Aedes mosquito can only transmit Zika virus after it bites a person who has this virus in their blood. Thus far in California, Zika virus infections have been documented only in people who were infected while traveling outside the United States or through sexual contact with an infected traveler. To date there has been no local mosquito-borne transmission of Zika virus in California.

Zika virus is not spread through casual contact, but can be spread by infected persons to their sexual partners. Zika virus infection in pregnant women can cause birth defects and other poor pregnancy outcomes. Additionally, there is an association between Zika and Guillain-Barré Syndrome (GBS), a disease affecting the nervous system.

Click here to visit the California Department of Public Health for more information about Zika.

Mosquito Fish

DEHS’s Mosquito and Vector Control Program (MVCP) is offering FREE mosquito fish to all County residents within MVCP’s jurisdiction. These mosquito fish are to be used on private property to reduce the potential for mosquito breeding. One request may be made per year for each household. A valid form of California identification, a utility bill or other official document indicating residence is required to verify jurisdictional residence. Click here to determine if you are within MVCP’s jurisdiction.

To receive mosquito fish, visit the MVCP office during regular business hours at 248 South Sierra Way, Unit E, San Bernardino, CA 92415 and complete a Mosquito Fish Request form. To print the Mosquito Fish Request form, click here.

NOTE: Distribution of mosquito fish is subject to availability.

To learn more about mosquito fish, click here.

What Vector Control District Am I In?

Please click here to find out what vector control district you are in.

Report a Dead Bird

Certain species of birds are very susceptible to West Nile virus and often die from it. Reporting dead birds and squirrels is a very helpful tool to our disease surveillance and monitoring efforts. The Mosquito and Vector Control Program and the California Department of Public Health use dead bird reports to help identify increased West Nile virus activity in an area.

If you see a bird that has been dead for less than 24 hours, please call 1-877-WNV-BIRD
(1-877-968-2473) or report it online here.

Mosquito & Vector Control Documents

Africanized Honey Bees Q & As

Bed Bugs



Hantavirus Illness and How to Avoid it

Is it a Mosquito?

Lyme Disease


   Mosquito Fish

Non-Biting Midges


West Nile Virus: Important Facts and Safety Tips

West Nile Virus Information for Seniors: What You Need to Know to Keep Yourself Safe

What is a Vector

Mosquito & Vector Control Annual Reports

2017 NPDES Notice of Intent

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