The last time Andover conducted any spraying was in 2001, when several mosquito pools tested positive in West Andover and North Tewksbury.
The Board of Health and the mosquito control district are asking residents in the target area to survey their own yards for standing water and eliminate it.
While the current treatment area is limited, residents throughout the town and surrounding communities should take precautions when outside during times of high mosquito activity, according to the letter. Long-sleeved shirts and long pants and use of an insect repellent containing DEET are recommended.
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