Mesa County’s COVID-19 Community Level is Low. Click for recommendations.

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(970) 248-6900

Mosquito Meter

Residents are encouraged to use protective measures

  1. DRAIN standing water on your property.
  2. DEET containing insect repellent when outside. (Picaridin, IR3535 or oil of lemon eucalyptus).
  3. DRESS in long sleeves and pants that have been sprayed with repellent.
  4. PROTECT by limiting exposure outside and check window screens.

Partnership with Grand River Mosquito Control District

This data is collected in collaboration with our community partners at the Grand River Mosquito Control District. It is because of this partnership that we’re able to provide real-time data on mosquito activity in the county. We’re grateful for their support and partnership to bring this important data to the community. You can visit their website for more information.


Culex Mosquito Counts Around the County:

This map shows the number of Culex species mosquitoes caught in mosquito traps around Mesa County for the most recent week. The Grand River Mosquito Control District (GRMCD) collects mosquitoes from each trap every week to keep track of which species of mosquitoes are showing up and where. There are 28 different types of mosquitoes present in Western Colorado, the Culex species are the only mosquitoes that cause disease (West Nile virus). The size of the circle changes based on how many Culex mosquitoes were caught in that trap the previous week. A bigger circle indicates more disease-causing mosquitoes were collected from that trap.

Culex Mosquitoes Counts in Selected Traps:

This chart shows the number of Culex mosquitoes that have been collected in the trap that you select in the map above. If no trap is selected, the number of Culex species for all traps is displayed. Counts for that trap are shown for 2018, 2019, 2020, and the average number collected from 2014-2019. Mosquitoes are counted from each trap each week, however, only the number of Culex species mosquitoes collected are displayed as these are the only ones known to cause human disease in Western Colorado.
Week numbers are used so that weeks are comparable across different years. For reference, July 4th usually falls during week 27 every year. The current week number is also shown in the bottom right corner of the chart.

Learn about West Nile virus