Sometimes communities ground or aerial spray pesticide to control mosquitoes in outdoor residential and recreational areas. Mosquitoes are a nuisance that impact quality of life, and they also can carry diseases, such as Eastern Equine Encephalitis (EEE) or West Nile Virus (WNV).
Pesticides are used at very low concentrations to control mosquitoes, and no adverse health risks are expected with its use for mosquito control. Negative health impacts would only be associated with long-term, repeated exposures to a chemical, not a short-term spraying episode. People who may be particularly sensitive to chemicals could possibly experience short-term effects, such as eye, skin, nose or throat irritation or breathing problems. Some pesticide residues may be present on outdoor surfaces after spraying. Studies on other chemicals suggest the amount of pesticide transferred to skin decreases with more time after spraying (and very little transfers 24 hours after spraying). Pesticides break down from surfaces more rapidly when exposed to sunlight and water.
Individual chemical sensitivities can vary; therefore, it is always a good idea to eliminate unnecessary exposures to ALL pesticides. All people, especially children and pregnant women should avoid exposure when practical.