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West Nile Virus & Symptoms | Harboring Mosquitoes| Breeding Prevention
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Maricopa County Environmental Services offers valley-wide mosquito ground fogging location information on their website at www.maricopa.gov/wnv. The locations to be fogged are subject to change based on mosquito trap results and citizen complaints about mosquito activity.
The county also operates a self-reporting system for people with chemical sensitivities and/or respiratory problems. Residents should call Maricopa County at (602) 506-0700, the West Nile Virus Information Hotline at (602) 747-7500 or visit www.maricopa.gov/wnv.
Do the West Nile Walk
Monsoons can cause standing water in otherwise dry places. Maricopa County and the City of Scottsdale encourage you to help identify and eliminate any potential breeding grounds for mosquitoes by doing the West Nile Walk around your property after a storm. For more information, contact Maricopa County Environmental Services at (602) 506-0700 or visit www.maricopa.gov/wnv 
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| In order to keep residents updated, Maricopa County Environmental Services offers valley-wide mosquito ground fogging location information on their website at
www.maricopa.gov/wnv .
These locations are subject to change based on mosquito trap results and citizen complaints about mosquito activity.
Residents are urged to:
- Clear all standing water in dishes, old tires, buckets, or pots around your yard
- Wear long pants and long sleeved shirts (particularly at dusk and dawn)
- Wear insect repellents (use sparingly and carefully) - follow label directions with any insect repellent
In addition, the county operates a self-reporting system for people with chemical sensitivities and/or respiratory problems. Residents should call
Maricopa County at (602) 506-0700.
The following phone contacts can provide additional information:
- Fogging Hotline: (602) 506-0700
- Health West Nile Virus Information Hotline: (602) 747-7500
As the city is made aware of the county's ground fogging plans, we will place this information on this webpage and also run the information on Scottsdale CityCable
Channel 11.
City Efforts
City parks, drainage easements and basins
The City of Scottsdale continues to treat all City parks, drainage easements and basins with larvicides (environmentally-friendly oils and briquettes) on an as-needed basis. These public areas are continually monitored by trained city staff in accordance with the guidelines set forth by the Maricopa County Environmental Services division.
WestWorld of Scottsdale
Designed by the Bureau of Reclamation, the WestWorld flood detention basin, located at 16601 N. Pima Rd., was originally configured as a "low spot" or drainage basin to retain area storm water. When standing water is present, this area is tested and treated for mosquito larvae every two weeks by a city-contracted company.
For more information about the city's proactive efforts, contact:
- City of Scottsdale Parks & Grounds Management - (480) 312-2915
- City of Scottsdale General Information - (480) 312-3111
West Nile Virus & Symptoms
The principle route of human infection with West Nile virus is through the bite of an infected mosquito. Mosquitoes become infected when they feed on infected birds, which may circulate the virus in their blood for a few days. The virus eventually finds its way into the mosquito's salivary glands.
During subsequent blood meals, the virus may be injected into humans and animals, where it can multiply and possibly cause illness. Most people who are infected with the West Nile virus will not have any type of illness. It is estimated that 20% of the people who become infected will develop West Nile fever within 3 to 14 days.
Minor Symptoms: fever, headache, body aches, occasionally a skin rash on the trunk of the body and swollen lymph glands.
Severe Symptoms (West Nile encephalitis or meningitis): headache, high fever, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, and paralysis.
If bitten by a mosquito:
- Wash bite with soap and water
- Apply cold cloth for swelling
- Apply anti-itch medication
- Watch for symptoms
- Seek a doctor's help if experiencing West Nile symptoms