Why do my radon levels change?

Radon is volatile. It is quite normal for radon levels to change up to a factor of 5 (5 times initial reading) within one 24-hour measurement. 

Radon levels can change because of the following reasons:

Changes in

  • Temperature
  • Pressure
  • Humidity
  • Ventilation
  • Building insulation
  • Building foundation
  • Use of water
  • Snowfall
  • Ice
  • Rain
  • Earthquakes

In addition, no radon test is 100% accurate. Radon levels will also change because of the inherent level of uncertainty in each method of measurement. 

Was this article helpful?
2 out of 2 found this helpful
Have more questions? Submit a request


Please sign in to leave a comment.