We Always suggest you test for RADON during inspections and due diligence:

Mecklenburg county has a 3 rating for Radon

Radon Map for Mecklenburg County

EPA info about Radon 

Home Inspection Carolina info about RADON

Radon is the decaying properties of radioactive material in the earth and cannot be seen, touched, or smelled. The EPA has determined that if the level of Radon is found within your home with a reading of 4.0 pCi/L or higher, radon mitigation is recommended. Radon has been linked to diseases such as lung cancer and is, in fact, the second leading cause of the disease.  Please see the video below for more information on radon gases.  Additional information can also be found at ncradon.org.