They seem to be alright. It's a more rural district, if that means anything to you. It's not too far from Syracuse though. Here's information on the district:
Central Square Schools - CSSD
https://www.nystart.gov/publicweb/District.do?year=2007&county=OSWEGO&district=46080 1060000 (broken link)
Central Square Central School District schools, Central Square - NY: charter and public schools. Central Square school district - Central Square NY school district
Also, keep in mind that Brewerton is a community that is in both Oswego and Onondaga County. It's a nice and small community of about 4,000 people with the Seneca River running through it. Oneida Lake is really close by too.