Grand River Mosquito Control District 970-257-0191

Grand River Mosquito District

A Note from the Management

  • GRMCD requires written permission from property owners to treat standing water.  If you are willing to allow mosquito control personnel onto your property for the purpose of mitigating mosquito larvae activity, please download and sign the Permission to Access  The signed form can be faxed to 970-241-3592, emailed to, or mailed to 531 Maldonado Street, Grand Junction, CO, 81501.  If you have any questions, please call 970-257-0191, Monday-Friday, 8:00 a.m. to 4:00 p.m. 
  • Any notification provided to the public during a Public Health Pest Control operation (i.e.: mosquito treatment applications) is done as a courtesy to those requesting, not because it is a state law requirement.  For further information on Pesticide Sensitive Facts and Registry go to  To register for free as pesticide sensitive, a Beekeeper, or as an organic farmer, go to      
  • Meetings of the Board of Directors of the Grand River Mosquito Control District are open to the public.  Regular Board Meeting will be held on the third Wednesday each month, at 6:00 p.m. The location is at the GRMCD office, 531 Maldonado Street, Grand Junction, Colorado.      


Grand River Mosquito Control District

The objective, of the Grand River Mosquito Control District, is to suppress mosquito populations, within the boundaries of the district, and in an environmentally responsible manner. A secondary objective is to monitor both larval and adult mosquito populations; to organize the population statistics, to evaluate organizational efforts, and to plan subsequent control strategies.

To inform our community, we have developed this web site to provide information on the different mosquito species and trends; our means to control the populations, and personal protection and prevention. We invite you to contact us, regarding any mosquito issues that exist in western Colorado.