Mosquito Control

Mosquito control services are provided by the Northwest Mosquito Abatement District for Cook County residents and by Clarke Environmental Mosquito Management Incorporate for DuPage County residents. Cook County residents can call the Northwest Mosquito Abatement District at 847-537-2306 with questions regarding their program. DuPage County residents can call Clarke Environmental Mosquito Management Incorporate at 800-942-2555 with questions regarding their program. Both programs utilize a balance of biological and chemical procedures that are environmentally compatible and economically feasible to reduce mosquito populations.


The following resources are available to learn more about area mosquito control and protection from the West Nile Virus:

Protection Index for West Nile Virus

To help DuPage County residents protect themselves against West Nile virus (WNV), the DuPage County Health Department has created a Personal Protection Index (PPI) that will inform residents of the amount of WNV activity in the county, as well as prevention steps that are recommended. The PPI provides residents with a current snapshot of WNV activity, ranging from zero to four, with zero being no activity and four announcing multiple human cases of WNV in DuPage County. The PPI will be updated every Wednesday at 3 p.m., by Health Department staff, during the surveillance season. The PPI will change to match the risk level (PDF) determined for that period. When activated, residents should follow the 4 D's of prevention that coincide with the PPI risk level. 

The 4 D's measures of prevention from West Nile Virus

Residents should observe the following defense measures to prevent the West Nile Virus:

  • Drain: Drain those items that collect standing water around your home, yard or business. Scrub and refill pet water dishes and bird baths regularly.
  • Defend: Use an insect repellent containing DEET when outdoors and reapply according to directions.
  • Dress: Wear long pants, long sleeves and closed toe shoes when outside to cover the skin.
  • Dusk & Dawn: Wear repellent outdoors during these prime times for mosquito activity.