Notices

Our district publishes all public notices in the local paper and here on the site. Other general announcements may be posted on the website and our community bulletin board, as appropriate.

The image shows an aerial view of a neighborhood with Castle View Elementary School and nearby amenities, highlighted in red.

July 24, 2026

Wide-Area Larval Mosquito Treatment Scheduled in Riverside

Northwest Mosquito and Vector Control District (the District) will conduct a Wide-Area Larval Mosquito Treatment in the City of Riverside on Friday, July 24, 2026. The treatment is scheduled between 3:00 a.m. and 6:00 a.m. in the area north of Century Avenue and west of Claridge Drive. Please see the accompanying map for specific treatment boundaries.

The image shows an aerial view of Village Park, highlighting park areas and nearby streets in a residential neighborhood.

July 20, 2026

Upcoming Control Treatment for Adult Mosquitoes

Northwest Mosquito and Vector Control District will perform adult mosquito spray treatments on Monday, July 20, 2026, to reduce mosquito populations in designated recreational areas within the City of Corona. The treatment is being conducted in response to elevated adult mosquito abundance in these areas.

A flyer for a mosquito control event in Eastvale with a map, dates, a QR code, and insecticide information.

October 24, 2024

Wide-Area Adult Mosquito Treatment Planned for City of Eastvale

Due to elevated mosquito abundance, Northwest Mosquito and Vector Control District (NWMVCD) will be conducting a wide-area mosquito control applications on October 24th and 25th, 2024. These spray applications will be conducted between the hours of 3:00 a.m. to 6:00 a.m. at the following location: the City of Eastvale between the streets of Archibald Ave. and Scholar Way near the bike path (see…

An aerial map showing a planned area for mosquito control treatment in Eastvale with date and product details.

September 26, 2024

Wide-area Adult Mosquito Treatment Planned for City of Eastvale

Due to elevated mosquito abundance, Northwest Mosquito and Vector Control District (NWMVCD) will be conducting a wide-area mosquito control applications on September 26, 2024. This spray applications will be conducted between the hours of 3:00 a.m. to 6:00 a.m. at the following location: the City of Eastvale between the streets of Archibald Ave. and Scholar Way near the bike path (see photo for…

Map showing mosquito application area with QR code and date info::_('Eastvale Wide-Area Larval Mosquito Application').

August 29, 2024

Wide Area Larval Mosquito Treatment Planned for City of Eastvale

Due to elevated mosquito abundance, Northwest Mosquito and Vector Control District (NWMVCD) will be conducting a wide-area mosquito control applications on August 29th, 2024. These spray applications will be conducted between the hours of 3:00 a.m. to 6:00 a.m. at the following location: the City of Eastvale near the southwest corner of Schleisman Rd and Achibald Ave (see map for more details).

Map showing a mosquito control application scheduled area with date, time, and product used.

August 24, 2024

Wide Area Adult Mosquito Treatment Planned for City of Eastvale

Due to elevated mosquito abundance, Northwest Mosquito and Vector Control District (NWMVCD) will be conducting a wide-area mosquito control applications on August 24th, 2024. These spray applications will be conducted between the hours of 3:00 a.m. to 6:00 a.m. at the following location: the City of Eastvale near the southwest corner of Schleisman Rd and Achibald Ave (see map for more details).

An aerial map with red lines marking areas for mosquito control application.

August 15, 2024

Wide Area Adult Mosquito Treatment Planned for City of Corona

Due to elevated mosquito abundance and a West Nile virus positive mosquito sample, Northwest Mosquito and Vector Control District (NWMVCD) will be conducting a wide-area mosquito control applications on August 15th, 2024. These spray applications will be conducted between the hours of 3:00 a.m. to 6:00 a.m. at the following location: the City of Corona, cross street of Ontario Ave. and Main Street…

An aerial map view with marked routes for larval control treatment in a residential area near a body of water.

August 9, 2024

Multiple Wide Area Mosquito Treatments Planned

Due to elevated mosquito abundance, the Northwest Mosquito and Vector Control District (NWMVCD) will be conducting multiple wide area larval and adult mosquito control applications on August 9th, 2024.

Press Release: Riverside County Mosquito Samples Test Positive for West Nile virus

Aerial view of a neighborhood with red lines marking a path or boundary.

August 8, 2024

Wide Area Mosquito Sprays Planned for City of Riverside

Due to elevated mosquito abundance, Northwest Mosquito and Vector Control District (NWMVCD) will be conducting a wide-area mosquito control applications on August 8th, 2024. These spray applications will be conducted between the hours of 3:00 a.m. to 6:00 a.m. at the following location: the City of Riverside near the southwest corner of Van Buren Blvd and Wells Ave (see map for more details).

Aerial map showing a mosquito treatment spray route through residential streets.

August 2, 2024

Wide-Area Mosquito Control Treatments Planned for City of Eastvale

Due to elevated mosquito abundance, Northwest Mosquito and Vector Control District (NWMVCD) will be conducting a wide-area mosquito control applications on August 2nd, 2024. These spray applications will be conducted between the hours of 3:00 a.m. to 6:00 a.m. at the following location: the City of Eastvale near the southwest corner of Schleisman Rd and Achibald Ave (see map for more details).

An aerial map showing a mosquito treatment route alongside the Santa Ana River near several residential areas and parks.

August 11, 2023

Wide-area Mosquito Sprays Planned for Cities of Eastvale and Norco

Due to the detection of West Nile virus (WNV) activity and elevated mosquito abundance, the district will perform adult mosquito spray treatments on August 11th., 2023 to lower the mosquito population affecting recreational and residential areas along the Santa Ana River in the Cities of Eastvale and Norco. The spray application will be conducted between the hours of 3:00 am to 6:00 am at the…

Riverside Mosquito Sample Tests Positive for West Nile virus

Northwest Mosquito and Vector Control District

Map showing a designated spray route for adult mosquito control in a neighborhood on August 24, 2022, from 3 AM to 6 AM.

Riverside Mosquito Treatments Planned for August 24th and 25th

Due to the detection of West Nile virus activity and elevated mosquito

Sign up for updates from Northwest Mosquito and Vector Control District