Radon

Radon is a radioactive gas you can't see, taste or smell. It's found throughout the United States and can move up through the ground and into a home through cracks and holes in the foundation, building up to high levels.

Radon can get into indoor air when released from tap water through showering, washing dishes and other household activities, and is sometimes associated with groundwater. In most cases, radon entering the home through tap water will be only a small source compared to radon entering the home through soil.

Radon is a known human carcinogen. Breathing air containing radon can lead to lung cancer. Drinking water containing radon also may cause increased risk of stomach cancer.

If you're concerned about radon in your home, test your home's air—it's inexpensive and easy with an over-the-counter kit. If the level of radon in your air is 4 picocuries per liter of air (pCi/l) or higher, you should find the source of the problem and fix it. There are simple ways to fix a radon problem that aren't too costly.

For more information, call the EPA's Radon Hotline at 800-SOS-Radon or see their
frequently asked questions about radon.