Protect Yourself and Your Family from Radon

Radon is a gas that you cannot smell, taste or see. Radon forms naturally when uranium, radium and thorium break down in rocks, soil and groundwater. People can be exposed to radon primarily from breathing radon in air that comes through cracks and gaps in buildings and homes.

Breathing in radon can cause health problems. Radon is estimated to be the second leading cause of lung cancer in the United States, responsible for over 20,000 lung cancer deaths each year, according to the Environmental Protection Agency.

  • You can take steps to reduce high radon levels in your home.
  • Testing your home is the only effective way to find out if you have a radon problem.
Radon Toolkit

Radon Communication Toolkit

Radon Toolkit for Public Health Professionals

Radon and Your Health

Radon in the Home

Take Steps to Reduce Radon

a residential neighborhood

Tracking Radon

Explore maps, charts, & tables


Radon is Real

Supporting STEM Education with Radon Outreach

A picture of a town in Washington showing apartment buildings with forest and mountains in the background. The caption reads: TRACKING IN ACTION: Mapping Radon Exposure in Washington

Video: Mapping Radon Exposure

Keeping Washington state residents safe

Related Links

Page last reviewed: January 29, 2020