Kitchen with granite countertop
Photo: Muffy Kibbey
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The Curious Case of the Geiger Countertop

Mining stone for countertops may unearth some potentially scary radioactivity as well. Granite countertops are known to emit radiation and radon, albeit at very low levels, as they can contain naturally occurring uranium and other radioactive elements, such as thorium. To see if granite countertops are affecting your home's radon levels, contact the American Association of Radon Scientists and Technologists ( or visit the Marble Institute of America's website.
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