Within Onondaga county radon levels differ from town to town. Camillus and Manlius tend to have high radon levels while towns like Clay and Cicero do not. However the only way to know if radon affects a specific home is to perform a radon test at that home.
Even if you don’t have interest in a radon test during a real estate purchase it will make sense to have done. This is because when you sell your house there is a good chance the next buyer will care about radon. If your home fails you will likely be on the hook to pay for radon reduction to sell your house. However if you test as the buyer you can have the seller pay.
The EPA recommends radon tests be performed every 2 years -even if a mitigation system is present- because the radon levels in any home may vary depending on many factors including: time of day, temperature, season, barometric pressure, ventilation, construction changes to the building etc.
Radon testing requires leaving a small, silent measurement device inside a home, usually for 48 hours.