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Richardson Plans Mosquito Spraying Thursday and Friday
Posted Date: 7/26/2017

The Richardson Health Department plans to ground spray five areas (schedule and maps provided below) beginning this Thursday, weather permitting, in order to help prevent the spread of the West Nile virus. The decision to spray comes after City Health Department workers were notified that traps located within the subject spraying locations returned mosquitoes that tested positive for carrying the disease.

The City began collecting test samples on a weekly basis in April.

For more information on Richardson's mosquito abatement program, please visit

Spraying Locations
Weather permitting, spraying will occur according to the following schedule:

Thursday, July 27, and Friday, July 28*
- Arapaho Road south to Spring Valley Road and Coit Road east to Cottonwood Creek

Zone E


 - Renner Road south to Lookout Drive and Plano Road east to the President George Bush Turnpike
Zone J


- Campbell Road south to Arapaho Road and Coit Road east to Cottonwood Creek
Zone C

- Campbell Road south to Arapaho Road and Cottonwood Creek east to Richardson Drive
Zone D

- Arapaho Road south to Walnut Street and US 75 east to Bowser Road
Zone G


*As part of plans to increase the response to incidents of finding the West Nile virus in mosquito traps, targeted neighborhoods are sprayed twice. **Spraying events begin at 9 p.m. and will end by 4:30 a.m.

If wind speeds of greater than 10 mph are sustained or if it is raining, or if temperatures are forecast to drop below 50 degrees Fahrenheit, then Health Department staff may postpone spraying until weather conditions are more favorable.

Increased Surveillance
Richardson is working in conjunction with other cities and health agencies in the Metroplex to mitigate the spread of West Nile virus. Additional measures being taken in Richardson include:

  • Earlier monitoring of mosquito populations using traps strategically placed in the city;
  • Residential pool abatement, to reduce areas where mosquitoes can breed;
  • Treatment of storm drain system;
  • Closer collaboration among departments to reduce areas where water can become stagnant;
  • Deploying fish that can eat mosquito larvae, and increasing the areas where larvicide is used;
  • Improving the adulticide response by working with a private contractor that can provide additional ground spraying capacity;
  • Collaborating more closely with regional partners to provide an improved response.

How Spraying Locations are Chosen
The Richardson Health Department schedules mosquito spraying based on positive findings of West Nile virus in mosquito traps placed around the city. Once located, the area around the positive finding is targeted for spraying in an attempt to help limit the spread of the disease. In an effort to decrease the incidents of finding the West Nile virus in people and mosquito traps, targeted neighborhoods are being sprayed twice as part of a comprehensive plan implemented in early 2013 to help deter the spread of the disease. However, spraying is only a measure to help limit exposure, and health workers urge people to maintain vigilance in protecting themselves when going outside.

When Spraying Occurs
The Health Department schedules spraying events during overnight hours to limit exposure to people who may wish to avoid contact with the pesticide used to control mosquito populations. Spraying events begin at 9 p.m. with the goal of ending by 4 a.m., though they may run until 4:30 a.m. depending upon the size of the spray area.

Spraying is One Part of the Protection Plan
Spraying to control the population of mosquitoes and the spread of the West Nile virus is one component of a comprehensive plan the Richardson Health Department follows to control the mosquito population. Other activities include: continuous monitoring of mosquito test pool results, implementation of a residential pool abatement program to reduce areas where mosquitoes can breed, treatment of storm drains, use of larvicide and mosquito-eating fish along creeks and other stagnant bodies of water to prevent mosquito larvae from developing into adults, monitoring and notification in neighborhoods where potential mosquito breeding areas are discovered, closer collaboration with regional health departments, and public education efforts through mass communications channels.

Spray Zones Map
(Map of Richardson mosquito testing sites.)

How to Protect Yourself
To protect from mosquito bites, people are asked to follow the Four D’s of protection:

  • DRAIN standing water around the home,
  • Use insect repellent containing DEET,
  • Avoid being outdoors at DUSK and DAWN when mosquitoes are most active,
  • And DRESS to protect yourself with long sleeves and pants to reduce skin exposure.

More On the West Nile Virus
The West Nile virus is transmitted by a bite from an infected mosquito that's already carrying the virus, but not all mosquitoes are capable of carrying or transmitting the disease. In North Texas, the risk of being bitten by an infected mosquito is greatest from July to October. Not everyone who gets bitten by an infected mosquito will get the virus, and it's rare for people to become very sick if they do develop symptoms from the disease.

Symptoms of West Nile virus vary depending upon the person who becomes infected. People who do develop symptoms usually suffer from mild "flu-like" illness. Rarely, symptoms may require medical care or hospitalization. The people who are most susceptible to the disease are the very young, the very old and those with weakened immune systems.