Objective To assess the exposure levels and sources of power frequency magnetic field in college students and analyze the features.
Methods Personal samplers were used to measure their 24 h exposure to power frequency magnetic field. A questionnaire were filled to record the personal information and activities.
Results Ninety-two individual samples were collected, comprising 44 males, 48 females, with their age ranging from 21 to 34 years old. The median and interquartile range (IQR) of cumulative exposure levels over 24 h was 1.249 μT/h and 0.930 μT/h, with no significant difference by sex, academic degrees (undergraduate and graduate students). The main source was the computer, and the location of the peak exposure were generally concentrated in school dormitory, library and dining hall. During the 24 h, the frequency of people exposuring to high level magnetic field (>0.4 μT)was diversed in different periods of time and was associated with personal activities.
Conclusion The study substantially expands information on students exposure to power frequency magnetic field in college and the exposure levels is related to personal activities and locations.
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