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Northwest Mosquito & Vector Control District

Post Date:06/27/2019 11:00 AM

The Northwest Mosquito & Vector Control District will perform adult mosquito spray treatments on June 28th, 2019 to lower the mosquito population affecting recreational and residential areas along the Santa Ana River in the City of Eastvale and the City of Norco. The spray application will be conducted between the hours of 2:00 a.m. to 6:00 a.m. at the following locations: the Riverwalk Park and bike trail located next to the Santa Ana River, Eastvale Community Park, Granja Vista Wetlands, and Silverlakes Sports Complex. Please see the attached image for the exact spray route.

The District will be treating these areas with Aqua-Reslin (EPA Reg. 432-796), which is approved for use in mosquito control by the US EPA. They have been working hard to use Integrated Pest Management Practices in these areas, and the majority of their efforts focus on preventing mosquito breeding and killing mosquito larvae before they become flying adults. However, due to elevated trap counts, they have decided that adult mosquito control via truck-mounted ground fogger is the best method to control the current mosquito populations in these areas. Signs were posted on June 26th, 2019 in the areas that will be sprayed to inform the public of these activities.  Information regarding the treatment will be posted on the district's website at If there are any questions or concerns please contact the District at 951-340-9792.

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