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Mosquito Activity on the Rise—Potential for West Nile Virus Increasing

This press release was posted 1,586 days ago and may contain inaccurate information.

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Contact Information
  • Mike Calhoon, City of Fort Collins, West Nile Virus Program Manager, 970-416-2079
  • Susan Herlihy, Interim Director, Communications and Public Information Office, 970-221-6207
The presence of West Nile Virus in Culex mosquitoes, the type of mosquitoes that can carry the virus, has tripled in the last week. In accordance with the City’s West Nile Virus policy, as the level of risk for West Nile Virus passes a specific threshold, the City of Fort Collins may need to spray for adult mosquitos. Residents are urged to sign up for the City’s email notification system at so they can be notified when spraying becomes necessary in their neighborhood. Fort Collins residents without internet access can sign up to receive phone notifications by calling Colorado Mosquito Control at 970-663-5697 or 970-962-2583.

The City of Fort Collins aims to reduce the risk of human West Nile virus infection while limiting adverse human health and environmental impacts. Any recommendation for spraying originates from the Larimer County Department of Health and Environment (LCDHE) and is preceded by a detailed analysis of West Nile virus risk by a 3-person West Nile Advisory panel that provides feedback to the City Manager.

The City also encourages residents to take precautionary measures to protect themselves against mosquitos. Residents can reduce the number of mosquitoes around their house by removing standing water in ponds, gutters, flower pots, and tires.

Residents can also reduce their risk by wearing long sleeves and pants and insect repellent. Repellents vary based on protection time and active ingredient and temporarily keep hungry mosquitoes from identifying humans as a food source.
To learn more about the virus, the City’s response plan, and to sign up for email notifications, visit the City’s website at
The City uses a data-driven approach to determine if and when spraying for adult mosquitos should occur. The West Nile Management Policy and Program Response Guidelines are available online at