Granite and quartzite used in commercial and residential construction, including kitchen and bathroom countertops, are also naturally radioactive.
https://healthybuildingscience.com/2012/04/27/radioactive-granite-and-quartzite-risks-from-radon/
If you live on land above granite deposits, your ground is radioactive.
The real issue is how radioactive.
If you have land in certain areas of South Park, Colorado, you must get a radiation survey before building a house on it. The "natural background radiation" in those areas is at a level considered hazardous.
Did the dinosaurs fight a war with atomic weapons in the ancient lands that became Colorado?