Northwest Mosquito and Vector Control District

Northwest Mosquito and Vector Control District The Northwest Mosquito and Vector Control District provides vector control services in the northwest

The Northwest Mosquito Abatement District was formed on December 28, 1959 to control mosquitoes in the northwest portion of Riverside County encompassing 150 square miles. The population of the District at that time was approximately 50,000 residents. Since inception, the District has grown significantly in population and area. Additionally, the geographical landscape has changed dramatically, fro

m rural to mostly urban and suburban, thus creating a different set of vector problems. In 1968, upon request by the Board of Supervisors, the Board of Trustees adopted the additional responsibility of controlling biting gnats in areas adjacent to the Santa Ana River without additional revenues to the District. On August 16, 1993, the District added services to control all important vectors and changed its name to NORTHWEST MOSQUITO AND VECTOR CONTROL DISTRICT. In July 1994, the District purchased its present facility and relocated its headquarters to Corona. At present, the District provides vector control services (mosquito, flies, rats, Africanized honeybees, black flies, midges and occasionally other vectors of minor public health importance) over an area of 240 square miles with a population of approximately 500,000. You can visit our webpage at www.NorthwestMVCD.org
Twitter: https://twitter.com/NorthwestMVCD

Swipe to see what our technician found in just one dip. ➡️ As summer winds down, some pools are used and maintained less...
08/28/2026

Swipe to see what our technician found in just one dip. ➡️
 
As summer winds down, some pools are used and maintained less often. Without regular care, the water can become a place for mosquitoes to lay eggs and develop.
 
If you have a green pool, or know of one nearby, please let us know. Our technicians can inspect the pool, check for mosquito breeding, and treat it if necessary. Depending on the pool, mosquito fish may also be an option to help prevent breeding.

Report a green pool:
951-340-9792 or www.northwestmvcd.org

Two additional mosquito samples collected in Eastvale have tested positive for West Nile virus. Protect yourself: use EP...
08/26/2026

Two additional mosquito samples collected in Eastvale have tested positive for West Nile virus. Protect yourself: use EPA-registered insect repellent, wear long sleeves and pants, and dump, drain, and scrub standing water weekly. Questions? Call 951-340-9792.

Mosquito samples collected in El Cerrito have tested positive for West Nile virus, the first positive mosquito samples d...
08/26/2026

Mosquito samples collected in El Cerrito have tested positive for West Nile virus, the first positive mosquito samples detected there this season. Protect yourself: use EPA-registered insect repellent and dump, drain, and scrub standing water weekly. Questions? Call 951-340-9792.

08/20/2026

This World Mosquito Day, take a few minutes to check your yard for standing water and eliminate potential mosquito breeding sites. Together, we can stop mosquitoes where they start.

Northwest MVCD will be conducting wide-area adult mosquito treatment in City of Eastvale, CA  on August 20th, 2026 betwe...
08/18/2026

Northwest MVCD will be conducting wide-area adult mosquito treatment in City of Eastvale, CA on August 20th, 2026 between 3:00 am-6:00 am. Visit our website at www.northwestmvcd.org for more information.

West Nile virus positive mosquitoes found in Riverside and Eastvale. Help protect yourself, your family, and your commun...
08/13/2026

West Nile virus positive mosquitoes found in Riverside and Eastvale. Help protect yourself, your family, and your community:

-Apply an EPA-registered insect repellent as directed.
-Wear loose-fitting long sleeves and pants, especially from dusk to dawn, when practical.
-Once a week, dump, drain, and scrub anything that can hold standing water.
-Repair window and door screens to keep mosquitoes outside.

Questions or mosquito concerns? Visit www.northwestmvcd.org or call 951-340-9792.

Our District was proud to staff two National Night Out locations this year, Norco and Lake Elsinore!We enjoyed connectin...
08/05/2026

Our District was proud to staff two National Night Out locations this year, Norco and Lake Elsinore!
We enjoyed connecting with residents and sharing helpful information about mosquitoes, mosquito prevention, and the services we provide. Thank you to everyone who stopped by to ask questions, learn more, and spend time with us. We’re grateful to serve such engaged communities! 🦟❤️

City of Lake Elsinore
City of Canyon Lake
City of Norco | Horsetown USA®
City of Eastvale
City Of Jurupa Valley
 

07/31/2026

Come along as we set mosquito traps! 🦟 These traps help us monitor mosquito activity and protect public health throughout our service area.

Adult mosquito control treatment is scheduled for Friday, July 31, from 3:00–6:00 a.m. at Village Park and in portions o...
07/29/2026

Adult mosquito control treatment is scheduled for Friday, July 31, from 3:00–6:00 a.m. at Village Park and in portions of the surrounding neighborhood in the City of Corona.

The treatment is being conducted in response to elevated adult mosquito activity. Aqua-Reslin, an EPA-registered insecticide, will be applied using truck-mounted Ultra-Low Volume sprayers.

Please see the map for the planned treatment route. For more information, call (951) 340-9792, email [email protected], or visit our website at northwestmvcd.org.

From preparation to application! Early this morning, our team successfully completed a Wide-Area Larval Mosquito Treatme...
07/24/2026

From preparation to application! Early this morning, our team successfully completed a Wide-Area Larval Mosquito Treatment in the City of Riverside, north of Century Avenue and west of Claridge Drive.
 
The work began the day before as staff carefully prepared the equipment and materials needed for the treatment. The team used VectoBac WDG (EPA Reg. No. 73049-56), an EPA-registered biological larvicide containing Bti. Bti targets mosquito larvae in water before they can become flying, biting adults. According to the EPA, Bti is not toxic to people, and the product was applied by trained District staff according to label directions.
 
Thank you to our team for the preparation, coordination, and hard work that made this treatment possible! This work is part of the District’s ongoing efforts to reduce mosquito populations and protect public health.
 
Learn more at www.northwestmvcd.org or call 951-340-9792 with questions.

Address

1966 Compton Avenue
Corona, CA
92881

Opening Hours

Monday 7am - 4:30pm
Tuesday 7am - 4:30pm
Wednesday 7am - 4:30pm
Thursday 7am - 4:30pm
Friday 7am - 4:30pm

Telephone

+19513409792

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