According to the US EPA:
Radon is a cancer-causing natural radioactive gas that you can’t see, smell or taste. Its presence in your home can pose a danger to your family's health. Radon is the leading cause of lung cancer among non-smokers. Radon is the second leading cause of lung cancer in America and claims more than 20,000 lives annually.
Based on this EPA map, it looks like Sacramento has relatively low radon levels, but since the EPA recommends that we all test our home's radon levels, I ordered this test for us and for our family members in Colorado and Minnesota too, since the average radon levels appear to be pretty high in those states.
