Radon in ground water as a factor of risk for human health
Radon is a practically inert radioactive gas. However, its products emit alpha particles, which when entering human organism can cause cancer. The inspection of 2379 water wells in Czech Republic shows that 31% of them indicate the exceeding of permissible concentration of radon in drinking water. For this reason, the investigation of radon regularities in the earth's crust has been undertaken. The analysis of radon concentration in ground water in different types of rocks is given. Also ways to decrease the risk of cancer disease by water treatment are considered.