Glen Ellyn MAD

Welcome to

Glen Ellyn Mosquito Abatement District


DuPage County, IL


What we do...



The Glen Ellyn Mosquito Abatement District was established by referendum in 1955. It services an area including the Village of Glen Ellyn, Illinois, except areas west of Bloomingdale Road, as well as unincorporated areas north of Glen Ellyn lying east of Bloomingdale Road, south of North Avenue and west of the East Branch of the DuPage River.

The District is managed by a Board of Trustees, five in number, who are appointed by the Milton Township Board. The District’s Trustees all reside in the District and serve without compensation. The Board meets on the third Wednesday of each month except during the months of November, December and February. The meetings are held at 6:00 P.M. in a third floor meeting room in the Glen Ellyn Village Hall. Please note that the District is not part of the Village of Glen Ellyn but is an independent municipal government.

The District’s revenues come from its tax levy on real estate. Its tax levy has been capped at .0111. What this means is that if real property has a market value of $450,000, resulting in an assessed value of $150,000, the District would receive about $16 in real estate taxes from it.

The District’s abatement program is run under a contract with Clarke Environmental Mosquito Control, now known as Clarke. There are three components to the program, being: surveillance, larval treatment and adult treatment.

As to surveillance, pools of standing water are checked starting in May for the presence of mosquito larva. Also the District maintains three traps to monitor adult mosquitos. Two of those traps are for monitoring floodwater mosquitos which usually occur in the late May and June months of the mosquito season. The third trap is to monitor and test the Culex type of mosquito. That type becomes more numerous in the latter part of the mosquito season. It’s that type of mosquito that carries the West Nile virus in the area. The County Health Department also maintains and tests that type of trap for West Nile, but none of the County’s traps are in the District.

Larval treatments are made regularly by adding tablets to pools of standing water, areas known for holding water during spring rains or heavy rains later in the season, and to storm water catch basins throughout the District that hold water. These tablets dissolve in the water and inhibit the growth of mosquitoes before becoming adults.

Typically the District does three District wide adult treatments. Historically, two of the treatments would be made around Memorial Day and in mid-June to combat the spring flood water mosquitoes, which are considered annoyance mosquitos. The third treatment was reserved for later in the summer, as needed. However, with the incursion of the West Nile virus in the area as carried by the Culex type of mosquito, which is indigenous to the area and which appears in greater numbers toward the end of the summer, the District now does one late spring treatment for the flood water mosquitoes. The other two treatments are used late in the summer for the Culex mosquitos. As stated, the typical number of adult District wide treatments is three. However, because of West Nile the District has done more than three when health needs and conditions required.

For complaints about mosquito annoyance or places of standing water which you do not believe are being treated, call Clarke. Also, Clarke maintains a call line to advise residents when adult treatments will be made. To contact Clarke, call its toll free number: 1-800-942-2555. For inquires about the District please call: 1-630-469-4085, or contact it through its website: http//glenellynmosquitoabatement.com/