The county started spraying Monday night in the area off Imperial Oaks Boulevard, which is the location of where the West Nile sample was found.
RELATED: Houston flies annoyingly high on list of U.S. cities with most mosquitoes
This is the first positive sample in the area this season.
SEE ALSO: Woman wears 'insect prevention suit' to stop swarm of mosquitoes in Brazoria Co.
Woman wears camouflage bee suit to prevent mosquito bites in Brazoria County