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Wide-area mosquito treatment planned for 6-2-2023

May contain: neighborhood, outdoors, chart, and plot


The District will perform adult mosquito spray treatments on June 2nd., 2023 to lower the mosquito population affecting recreational and residential areas along the Santa Ana River in the City of Eastvale. The spray application will be conducted between the hours of 3:00 am to 6:00 am at the following locations: Eastvale Bike Trail and the Santa Ana River trails surrounding Riverview Park. Please see attached images for the exact spray route. 

The District will be treating this area with Aqua-Reslin (EPA Reg. 432-796), which is approved for use in mosquito control by the US EPA.  We have been working hard to use Integrated Pest Management Practices in this area, and the majority of our efforts focus on preventing mosquito breeding and killing mosquito larvae before they become flying adults; However, due to an elevated abundance of adult mosquitoes, we have decided that adult mosquito control via truck-mounted ground fogger is our best means to control the current mosquito population in this area. Signs were posted on May 31st., 2023 in the area affected by our spray application.  Information regarding the treatment will be posted on our website at If there are any questions or concerns, please contact the District at 951-340-9792.