Radon and its risks Radon Testing.
Radon is a radioactive gas which forms naturally when the Uran238 element decays. In turn, the radon gas decays into radon progeny. Radon progeny are radioactive metal atoms which get caught in our respiratory tracts during inhalation. When this decay takes place, radiation is emitted from the radon progeny which can damage the cells in our respiratory tracts and lungs. In the worst case they can cause cancer. According to the World Health Organization, WHO, depending on where you live, 3%-14% of all incidences of lung cancer are caused by radon.
Public Health authorities estimates that about 100 cases of lung cancer per year are caused by radon in Irish and Brittish homes and work places. If you live or work in a property with a high radon content, i.e. a radon content that exceeds the target level of 100 Bq/m³, you run a greater risk of being affected.
Measurement of radon in indoor air
As radon is both odourless and invisible, measurement is the only way to detect the gas. The amount of radon in indoor air varies with the season. These variations are primarily dependent on changes in outdoor temperature and wind conditions. The amount also varies during the day and night, and from room to room. How the ventilation system functions, and how often you give the house an airing also has an effect.
Consider measuring radon in the indoor air
- If no measurement has been conducted or more than ten years has passed since the last measurement.
- After a renovation, as small cracks can arise in the foundations where the radon gas can permeate in from the ground.
- If you have previously had a high amount of radon and have had measures implemented in your home to reduce it.
The measurement should preferably be for a duration of at least three months – the longer the period the more accurate the measurement. The limit values and guidelines we have in Ireland are given as an average annual value. In some cases, measurements are conducted with a shorter measuring period in order to obtain an approximate value, and we use short-term measurements with our specially designed detector Rapidos®, where measurements are taken over a period of at least 10 days. For example, this is common in connection with purchase and sale of buildings, when an indication of the radon level in the home is required quickly.
The measurement method we use is accredited according to ISO 17025.