You may have heard that granite countertops emit radiation. Here's what the science actually says.
Where the Concern Comes From
Granite is a naturally occurring igneous rock that contains trace amounts of uranium, thorium, and potassium — all of which are naturally radioactive. This is true. Granite does emit low levels of radiation and can release small amounts of radon gas.
This fact has been used to generate significant concern — and some misleading headlines — about the safety of granite countertops. Here's what the science actually says.
What the Research Shows
The EPA, the Health Physics Society, and multiple independent researchers have studied this extensively. The consistent finding: granite countertops are safe.
The EPA, the Health Physics Society, and multiple independent research organizations have studied granite countertop radiation extensively. The consistent finding is that granite countertops do not pose a meaningful health risk.
The radiation levels emitted by granite countertops are extremely low — comparable to the background radiation you receive from the earth, the sky, and building materials in general. The additional radiation exposure from granite countertops is a tiny fraction of the natural background radiation that everyone is exposed to every day.
The Radon Question
Radon is a radioactive gas that can be released from granite. This is the more legitimate concern, because radon is a known carcinogen at high concentrations and is the second leading cause of lung cancer in the United States.
However, the radon released by granite countertops is extremely small compared to the radon that enters homes from soil and groundwater. The EPA's studies found that granite countertops contribute a negligible amount to indoor radon levels — far less than the radon that enters through foundation cracks and soil.
If you're concerned about radon in your home, the appropriate response is to test your home's radon levels (test kits are inexpensive and widely available) and address any elevated readings with proper ventilation — not to avoid granite countertops.
The Bottom Line
Granite countertops are safe. The radiation and radon concerns, while technically grounded in real phenomena, do not translate into meaningful health risks in real-world conditions. The scientific consensus on this is clear and consistent.
Questions about granite? We're happy to discuss the material in detail.
Have questions about granite for your home?
We’re happy to discuss the material in detail — performance, maintenance, aesthetics, and anything else you’re wondering about.