Radon levels fluctuate naturally. It is possible 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

Therefore, no radon test is 100% accurate, and it is important to observe your radon exposure as a long term average.

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