China public limit at 50 Hz (power frequency)
100 µT magnetic flux density and 4 kV/m electric field for public exposure at 50 Hz, with 10 kV/m allowed on farmland and roads beneath overhead transmission lines.
Regulatorygeneral public0.025–1.2 kHz
Last verified 12 August 2026.
- Limit value
- 100 µTRegulatory value — legally enforceable — GB 8702-2014 Table 1 gives B = 5/f µT and E = 200/f V/m with f in kHz, so at 50 Hz (0.05 kHz) the values are 100 µT (1000 mG) and 4000 V/m (4 kV/m). Note 4 permits 10 kV/m at 50 Hz on cultivated land, pasture, aquaculture surfaces and roads under overhead lines, with warning signage. The same figure as the EU recommendation, and half the ICNIRP 2010 level.sources: china-gb-8702
- Quantity
- magnetic flux density
- Frequency band
- 0.025–1.2 kHz
- Population
- general public
- Set by
- China GB 8702-2014 electromagnetic environment control limits (GB 8702-2014, effective 1 January 2015)
- Kind
- Regulatory — legally enforceable
- Frequency-dependent formula
- B = 5/f µT and E = 200/f V/m (f in kHz)
Related records
- EU 1999/519/EC public magnetic field reference level, 50 Hz
100 µT (1000 mG) magnetic flux density and 5 kV/m electric field strength at power frequency, the values still in force across the EU.
Exposure limits
- ICNIRP 2010 general public magnetic field reference level at 50/60 Hz
200 µT (2000 mG) for the public and 1000 µT occupational — five orders of magnitude above typical household background.
Exposure limits
Sources
- china-gb-8702 GB 8702-2014 电磁环境控制限值 (Controlling limits for electromagnetic environment) — Ministry of Ecology and Environment of the People's Republic of China, 2014. regulation, link checked 2026-08-12.
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