A recent survey and study of the sources of magnetic fields in the home has
found that less than 2.5% of UK homes have background magnetic fields above
0.2µT (microtesla) associated with the electricity power supply, and most of
these are not close to major power lines or electricity substations.
The Radiation Protection Division of HPA carried out this study on behalf of
the Leukaemia Research Fund (Epidemiology and Genetics Unit, University of
York) which was funded by the Department of Trade and Industry and the Energy
Investigation and Identification of Sources of Residential Magnetic Field
Exposures in the United Kingdom Childhood Cancer Study (UKCCS) studied sources
of power frequency magnetic fields associated with nearly 200 homes identified
from the UK Childhood Cancer Study (UKCCS) and found that:
Most UK homes have background magnetic fields in the range 0.01 to 0.1 µT and
less than 2.5% have levels above 0.2 µT.
AplusA-online.de - Source: Health and Safety Executive (HSE)