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West Nile Virus

What You Need to Know

Mosquito Control Services

The Maryland Department of Agriculture (MDA) will provide mosquito control service to any community that would like to enroll in the program, within resource limits. Note: Mosquito control service cannot be provided within a community that has not enrolled in the program.

Mosquito, Standing and Stagnant Water Complaints

Owner-Occupied Residences

Complaints regarding owner-occupied residences should be referred to the EHS Office:
Phone: 410-887-3663                              
TTY users call via Maryland Relay

Rental Properties

Complaints regarding rental properties should be referred to:
Baltimore County Code Enforcement
Phone: 410-887-8099 or 410-887-3351
TTY users call via Maryland Relay

Recreational Areas and Large Commercial Sites

Complaints regarding recreational areas, streams, lakes, ponds and large commercial sites are also referred to EHS at, who will evaluate and refer the complaint to the Maryland Department of Agriculture, Mosquito Control Program, as necessary.

Dead Birds

Dead bird pickup and testing is no longer done in the State of Maryland. The risk of West Nile Virus infection is considered universal in Maryland and further testing of birds is not necessary. The disease is not transmitted by birds and the presence of dead birds does not predict human illness or dictate mosquito control efforts.

If you find a dead bird, please dispose of it as follows:

  • Wear plastic or latex gloves, or use a plastic bag as a glove.
  • With your gloved hand, place or wrap the bird in a plastic bag and tie the bag securely.
  • Dispose of the bag and gloves in an outdoor trash receptacle.
  • Wash your hands with soap and water.

Please note that dead birds may also be buried. Sick or injured birds should be reported to the Maryland Department of Natural Resources Wildlife and Heritage Service, Nuisance Animal Hotline at 1-877-463-6497.

Horses (Equine)

Your Horse and West Nile Virus informational brochure is available upon request by contacting:

Baltimore County Department of Health
Communicable Disease Division
Drumcastle Government Center
6401 York Road, Third Floor
Baltimore, Maryland 21212-2130
Phone: 410-887-2723
TTY users call via Maryland Relay

Information and Resources

24 Hour Hotline – Each year, beginning July 1 through October 31, the State Hotline 1-866-866-2769 will be available 24 hours a day providing recorded informational messages.
Mosquito Control Insecticides
– Information regarding specific mosquito control insecticides, including a label and material safety data sheet for each product, and ways to reduce exposure to an insecticide being applied, is available from the Maryland Department of Agriculture.

Centers for Disease Control and PreventionQuestions and answers regarding West Nile Virus.

Revised June 4, 2018         


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