What is Radon Gas ?

Radon gas emanates naturally from rocks and soils in the ground, mixes with air and rises to the surface where it is quickly diluted in the atmosphere. Concentrations in the open air are very low. However, radon that enters enclosed spaces, such as buildings, can reach relatively high concentrations in some circumstances.

  • Radon is a naturally occurring radioactive gas.
  • It comes from the minute amounts of uranium that occur naturally in most rocks and soils.
  • It has no odour, taste or colour (at standard temperature and pressure).
  • It can only be detected by using specialist equipment.
  • Radon is present throughout the country and in Thanet at levels that pose a low risk.

Action Level for Radon

The Health Protection Agency (HPA) measures radon levels in Becquerel per cubic metres of air (Bq m-3) and have advised the government that a reading of 200 Bq m-3 in homes should be considered the ‘Action Level’. This is the level at which action should be taken to reduce the radon concentration.