News and Announcements
Adult Mosquito Control Operations
Due to elevated levels of West Nile Virus and the mosquitoes that carry it, the next adult mosquito control operations are planned for Wednesday August 26th, weather permitting, between the hours of 8:00PM and midnight, for all areas within the village of River Forest, and between the hours of 9:00PM and midnight in the village of Oak Park.
Follow our Facebook page or check back regularly for updates to our operations. Please refresh in case your browser is running off of cache and not up to date!
Mosquito sprayings are scheduled only when mosquitoes are detected to be involved in elevated levels of a disease transmission cycle. In order to help fight against mosquitoes in your neighborhood, please check out our page on at-home prevention.
Click here for more information on the District's adult control operations.
Mosquito Season Update - August 25th, 2026
A quickly rising issue in the Chicago area is the invasive Asian Tiger Mosquito, which breed in small amounts of standing water in objects such as tires, buckets, tarps, cups, clogged gutters, pockets in trees, and endless other overlooked things. In some cases, they only need the amount of water that can fit into a bottle cap to develop. These mosquitoes peak in mid to late August, and the timing with the heavy region-wide rain really helped them take over.
Beyond routine mosquito control operations, additional community effort is important to eliminate these mosquitoes. They do not fly far from the water they come from, so please check around for any standing water. Dump, then store upside down or dispose of anything that can hold water, clean gutters that could be holding water, change bird bath water, cover rain barrels, and report anything too large to manage for inspection and treatment.
We also will accept up to 4 unrimmed tires from residents for disposal if brought to our Lyons location. When used according to the label, insect repellent containing DEET is very effective at preventing bites and the use of fans during outdoor activities can make it difficult for mosquitoes to fly or land.
Our focus is on larval control of mosquitoes in standing water, as it is really the only effective and reliable method of mosquito control. We unfortunately can't get access to every yard to adequately deal with them, making direct reports and resident cooperation necessary.
Spraying is only conducted against mosquitoes in an active disease transmission cycle, as numbers can be lowered enough to lower the spread of disease, but not noticeable annoyance.
Spraying for adult mosquitoes will be conducted during evening hours between dusk and midnight as needed in specific areas experiencing high levels of West Nile Virus activity. The District lists all areas to be sprayed on a particular evening on this page and through facebook, and in addition notifies Villages for inclusion on their websites.
For any general inquiries or to report standing water, please contact us!