Out in a National Park today to observe the background radiation levels. Mobile phone reception was between 0 and 1 bar.
The levels were very slight at < 10 micro Watts/m2 or the level of No Concern or at maximum Slight Concern per the International Building Biology Guidelines for Sleeping Areas (a place to sleep!):Contact Us
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No Concern – This category provides the highest degree of precaution. It reflects the unexposed natural conditions or
the common and nearly inevitable background level of our modern living environment.
Slight Concern – As a precaution and especially with regard to sensitive and ill people, remediation should be carried
out whenever it is possible.
Severe Concern – Values in this category are not acceptable from a building biology point of view, they call for action.
Remediation should be carried out soon. In addition to numerous case histories, scientific studies indicate biologi-cal effects and health problems within this reference range.
Extreme Concern – These values call for immediate and rigorous action. In this category international guidelines and recommendations for public and occupational exposures may be reached or even exceeded.