Color and uranium content.
Colors of granite and radon.
The health physics society after testing several samples of commercial granite concluded that the radon produced by a typical granite countertop would be about 30 times lower than the level laid out in the epa guidelines.
But don t swear off the stone just yet.
Radon originating in the soil beneath homes is a more common problem and a far larger public health risk than radon from granite building materials.
Granite like any other stone may contain veins of naturally occurring radioactive elements like uranium thorium and their radioactive decay products.
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.
Radon that originates in the soil is the main cause of radon problems the epa says.
Dozens of studies by scientists and the epa have measured the radon output of hundreds of granite colors and found radon levels to be far far lower than the amount that the epa considers safe.
Tips from the trade.
Granite countertops and radon gas science and technical committee of the american association of radon scientists and technologists aarst august 4 2008 2 pages.
The reports were about granite countertops that contain radium which can emit radon a radioactive gas that can cause lung cancer.
Yes granite emits radon.
There are currently no regulations concerning granite countertops radon gas or radiation emissions.
Claims of unacceptably high radon output have been criticized.
Granites can be black gray pink or red depending on the colors of the constituent minerals.
Granites can contain parts per billion of radium providing for an extremely small amount of.
This is perfectly illustrated by the contrast of the vivid veining and coloration of fusion granite by msi versus the simple monochromatic.
Ok so the risk from granite is minuscule but how common is radon in u s.
Your granite countertop health concerns answered january 19 2017 photo credit.
The epa says that approximately one of every 15 homes throughout the country whether new or old has elevated radon levels.