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Virus Activity

The map below displays within a quarter mile the location of traps where mosquitoes have tested positive for virus this year in the Coachella Valley.

Virus Risk Assessment Report
2024 WNV SLE Virus Risk Assessment Report
Human Cases in Coachella Valley 0 0 Current Report - Week of 06-10-2024
Mosquito samples 97 0 Year-to-date Reports
point map graphic

Balloons represent mosquito trap sites where West Nile virus- and St. Louis encephalitis-positive mosquitoes have been collected (red is for WNV and blue is for SLE. Balloons are within a quarter-mile of actual sites).

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The geographical representation of this map and/or drawing is provided for informational purposes only and should be used for reference only. Any information represented here is not guaranteed to be accurate or current. No reliance on angles, distances, area sizes or other land survey data should be assumed without verification by the user. Neither the Coachella Valley Mosquito & Vector Control District nor the Coachella Valley Mosquito & Vector Control District Information Technology Department accepts any responsibility for errors or omissions. This webpage may not be reproduced, edited, or otherwise altered in any way without advanced permission of the Coachella Valley Mosquito & Vector Control District Information Technology Department.

The District uses mosquito traps as part of our surveillance program to detect arbovirus activity. The traps are set up throughout the Coachella Valley in both urban and rural habitats.

Virus Risk Response

There are five risk factors that contribute to the overall risk of arbovirus transmission in an area.

  • Environmental conditions (rainfall and temperature)
  • Adult vector mosquito abundance
  • Virus isolation rates from mosquitoes
  • Infection rates in wild or domestic animals
  • Human cases of mosquito-borne viruses

Each of these factors is rated on a scale of 1 to 5, with 5 representing conditions indicative of a high risk of human infection with a mosquito-borne virus. An average rating is determined for the five factors and is correlated with the response level as follows:

  • Level 1: Normal Season (1.0 to 2.5)
  • Level 2: Emergency Planning (2.6 to 4.0)
  • Level 3: Epidemic Conditions (4.1 to 5.0)

More information on the risk factors and how they are scored is in our Mosquito-Borne Virus Surveillance and Emergency Response Plan.

 Protect Your Neighborhood From Mosquito-Borne Illness

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