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West Nile Watch 2021

Dallas County Health and Human Services - 2377 N. Stemmons Freeway, Dallas, TX 75207

Telephone: 214-819-2000

Fight the Bite with DCHHS Online Mosquito Services

DCHHS is committed to protecting the health and welfare of the communities we serve from mosquitoes and vector-borne disease. Residents experiencing a mosquito problem may call 214-819-2115 or click here to set up a free service request.

Scroll down to check if mosquitoes have tested positive for West Nile in your zip code.



Health officials urge the public to take protective measures by utilizing the ‘4Ds’ to reduce the risk of West Nile virus:

  • DEET - All Day, Every Day:  Whenever outside, use FDA approved insect repellents that contain DEET, picaridin or lemon-eucalyptus oil.
  • DRESS:  Wear long, loose fitting, light-colored clothing when going outdoors.
  • DRAIN:  All areas of standing water in or around your home where mosquitoes can lay their eggs.
  • DAWN & DUSK:  Limit your time outside during dusk and dawn when mosquitoes are most active.

Please Note:  Cases reflect information received at time of publishing and are subject to change. DCHHS will report additional positive human cases and mosquito pools as they are confirmed.

Human West Nile Cases 2021

Case #West Nile Infection TypeCity of ResidenceZip Code

West Nile Deaths 2021

There have been no West Nile associated deaths reported in Dallas County in 2021.

Positive West Nile Mosquito Samples (Traps & Pools)

Testing for infected mosquitoes is ongoing throughout Dallas County. The following is a list of cities and their corresponding zip codes where mosquito samples have tested positive for West Nile virus.

  • Positive Mosquito Traps = 9
  • Positive Mosquito Pools = 9

Please Note: Traps from the state may not yet be included

Pools Testing Positive by City and Zip Code
CityZip Code
Balch Springs
Cedar Hill75104 (1)
Cockrell Hill
Farmers Branch
Grand Prairie
Glenn Heights
Highland Park
University Park
Unincorporated Dallas County-Near Wylie

Data reflect information received at time of last update on 06/14/21 and are subject to change.
 DCHHS will report additional positive human cases and mosquito pools as they are confirmed.