Overseas, there is some concern about radon (a natural radioactive gas) in houses. Some areas have ‘hot spots’ where there are very high levels of radon gas.
There is no evidence of such hot spots in New Zealand. A survey in 1986/87 measured natural radiation (including radon levels) in houses across the country. Radon levels were similar to those found in most places overseas.
How much am I exposed to?
New Zealand soils only contain traces of uranium and radium (the sources of radon).
People in New Zealand generally get about half their dose of natural radiation from radon. The rest comes from cosmic radiation, and traces of other natural radioactivity in the soil, building materials, and in our bodies.
Go to Natural radiation for more information.