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Boulder County
Public Health

3450 Broadway
Boulder, CO 80304
(303) 441-1100

You are here: Health Home > Communicable Disease Control > West Nile Virus > Prevention > Property


Protect Your Property

What you can do as a homeowner to control mosquitoes:

  • Empty or clean out all water-holding containers in your yard (bird baths, tires, cans, rain barrels, wading pools) - 1 small can of water can hold as many as 10,000 mosquito larvae.
  • Keep your gutters cleaned.
  • Keep ornamental ponds free of weeds, cattails, or other aquatic vegetation.
  • Introduce mosquito-eating fish into ornamental ponds. Contact Colorado Mosquito Control (CMC) at 303-558-8730 to obtain fish for your pond(s).

Adult mosquitoes are most active at dawn and for about an hour after dusk. Plan outdoor activities during warmer daylight hours or later in the evening to avoid adult biting mosquitoes.

  • Keep your lawn mowed as short as possible.
  • Cut back dense vegetation surrounding your yard; this is where mosquitoes hide during the day.
  • Keep ornamental shrubs and bushes pruned to allow more light and air to flow through them.

Farmers and agricultural landowners:

  • Keep irrigation ditches free-flowing and clear of vegetation and debris.
  • Repair ditches to reduce seepage.
  • Minimize standing water to less than four (4) days in fields.
  • Fill tire ruts and hoofprints to avoid puddles.
  • Keep horse and cattle troughs clean by changing the water weekly.
  • Vaccinate horses for Western Equine Encephalitis.
  • Report standing water to CMC at 303-558-8730.

Top of Page

Resources
General Pesticide Information

Spray Schedule

Integrated Pest Management (IPM)

Mosquito Control District

Request Not to Apply Pesticides (PDF 428 KB)

DEET Background
New England Journal of
Medicine: Using DEET as a Mosquito Repellant
(PDF 86 KB)
 

Prevention
  1. Use DEET or alternative.
  2. DRESS in long sleeves and pants.
  3. Avoid DUSK until DAWN.
  4. DRAIN standing water. 
Resources
  1. Pesticide Info

  2. Current WNV Activity

  3. Educational Materials

  4. Boulder County WNV Response Plan

Contact Us

West Nile Virus Hotline
 1-877-462-2911

Boulder County Hotline
303-441-1460

Additional Contacts
  

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