What typical levels of power frequency magnetic fields are people exposed to at home?
The magnetic field levels encountered in UK homes are typically in the range 0.01–0.2 µT or 10–200 nanotesla (nT). The highest levels in homes usually occur close to operating appliances and electrical wiring. Sources outside the home can also contribute to exposure because common building materials do not shield magnetic fields. The lower ‘background’ level away from appliances usually comes from distribution circuits outside the home. Magnetic field levels may increase to a few microtesla close to domestic appliances or in homes beneath power lines.
