West Nile Virus and Mosquito Control Policy

Press Enter to show all options, press Tab go to next option

2018 Town-of-Berthoud-WNVIntroduction to West Nile Virus

West Nile is a serious, sometimes fatal, virus that has been found in Larimer County consistently over the past decade. The virus is transmitted by mosquitoes who bite infected birds and then spread that infection to humans and other animals.

There are no vaccines or treatments for the virus, so the best way to ensure safety is to prevent yourself from being bitten by mosquitoes.


If everyone takes preventative measures, the need for activating our control policies will be reduced.

The basics of West Nile prevention include:

  • Drain or dump standing water
  • Dress appropriately (long, loose-fitting clothing)
  • Defend yourself with insect repellant
  • Be aware at dawn and dusk, when mosquitoes are most active

Other preventative measures:

  • Stay clear of long grasses, wetlands, shrubs and grassy shores
  • Repair window and door screens to prevent mosquitoes from entering your home
  • Trim bushes away from the ground to allow for air flow and reduction of dampness
  • Leave dead birds where you find them and call 1.877.462.2911


 2019 Data

To monitor the mosquito population, the Town of Berthoud collects trap data. You can find these records below: 

2019 Annual Mosquito Report

June 2019 Monthly Report
July 2019 Monthly Report
August 2019 Monthly Report

Trap Data Test Data
 Aug 28, 2019  Week 35: Aug 28, 2019
 Aug 21, 2019  Week 34: Aug 21, 2019
 Aug 14, 2019  Week 33: Aug 14, 2019
 Aug 7, 2019  Week 32: Aug 7, 2019
 July 31, 2019  Week 31: July 31, 2019
 July 24, 2019  Week 30: July 24, 2019
 July 17, 2019  Week 29: July 17, 2019
 July 9, 2019  Week 28: July 9, 2019 
 July 3, 2019  Week 27: July 3, 2019
 June 26, 2019  Week 26: June 26, 2019
 June 19, 2019  Week 25: June 19, 2019
 June 12, 2019  Week 24: June12, 2019
 June 4, 2019    


Mosquito Control Safety

The Town of Berthoud is very concerned about protecting its residents from potential infection and also sensitive to the worries some may have regarding mosquito control. The issues of West Nile virus prevention and an emergency mosquito control policy are often controversial. 

Berthoud has partnerships with Colorado State University, the Larimer County Department of Health, and Vector Disease Control International to address the problems of both the West Nile Virus and emergency mosquito control measures.

Helpful links to navigate this page:

Learning more



Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.

Acrobat Reader Download Acrobat Reader Flash Player Download Flash Player Windows Media Player Download Windows Media Player Microsoft Silverlight Download Microsoft Silverlight Word Viewer Download Word Viewer Excel Viewer Download Excel Viewer PowerPoint Viewer Download PowerPoint Viewer