Champion School officials say measures have been to prevent the spread of mosquitoes on school grounds.
According to the district, during the first week in August, the Trumbull County Health Department deposited a tablet in the detention pond located behind the new baseball field.
The tablet was to eliminate mosquito larvae for up to 60-90 days.
Champion School nurse Rebecca Bucco spoke with the Health Department Director on Tuesday and said she was told that the tablet will keep larvae in check until the end of mosquito season.
That same day county health officials announced that one mosquito found in a pool along the bike trail in Champion Township tested positive for West Nile Virus.
The sample was collected between August 21 and August 22.
To date, there have been no human cases of West Nile Virus in Trumbull, Mahoning or Columbiana Counties.