- Cancer 101: Cancer Explained
- Guide to Breast Cancer
- Skin Cancer Risks
- Find a local Doctor in your town
- Radon Facts*
- EPA Recommendations for Radon
- Overview About Radon
- How Does Radon Get Into Your Home?
- How to Test Your Home for Radon
- Short-term Testing for Radon
- Long-term Testing for Radon
- How to Use a Radon Test Kit
- What Your Test Results Mean
- Radon and Home Sales
- Radon in Water
- How to Lower the Radon Levels in Your Home
- The Risk of Living With Radon
- Radon Risk Charts
- Radon Myths
- For Further Information
Quick GuideHome Health Pictures Slideshow: Surprising Sources of Indoor Air Pollution
Radon in Water
There are two main sources for the radon in your home's indoor air, the soil and the water supply. Compared to radon entering the home through water, radon entering your home through the soil is usually a much larger risk.
The radon in your water supply poses an inhalation risk and an ingestion risk. Research has shown that your risk of lung cancer from breathing radon in air is much larger than your risk of stomach cancer from swallowing water with radon in it. Most of your risk from radon in water comes from radon released into the air when water is used for showering and other household purposes.
Radon in your home's water is not usually a problem when its source is surface water. A radon in water problem is more likely when its source is ground water, e.g. a private well or a public water supply system that uses ground water. If you are concerned that radon may be entering your home through the water and your water comes from a public water supply, contact your water supplier.
If you've tested the air in your home and found a radon problem, and your water comes from a well, have your water tested.
If you've tested your private well and have a radon in water problem, it can be fixed. Your home's water supply can be treated in two ways. Point-of-entry treatment can effectively remove radon from the water before it enters your home. Point-of-use treatment devices remove radon from your water at the tap, but only treat a small portion of the water you use and are not effective in reducing the risk from breathing radon released into the air from all water used in the home.
For more information, call EPA's Drinking Water Hotline at (800) 426-4791 or visit www.epa.gov/safewater/radon.html If your water comes from a private well, you can also contact your state radon office.