It is possible for any granite sample to contain varying concentrations of uranium and other naturally occurring radioactive elements.
Brazilian granite radon.
The reports were about granite countertops that contain radium which can emit radon a radioactive gas that can cause lung cancer.
Radon that originates in the soil is the main cause of radon problems the epa says.
What about radon and radioactivity in granite countertops.
Color and uranium content.
The us epa recommends taking corrective measures for radon levels at or above 4 pci l the us epa encourages you to consider reducing your radon levels for readings between 2 and 4.
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Some granite countertops have been found to give off trace amounts of radon and reporters cited a few kitchens with radon levels as high as 25 times the epa s safety limit of 4 picocuries per liter of.
Granites can be black gray pink or red depending on the colors of the constituent minerals.
Ok so the risk from granite is minuscule but how common is radon in u s.
Does the epa believe there is a danger of radon gas or associated radiation being emitted from granite countertops.