According to researchers, there are no confirmed health risks associated with EMFs. This research stems from the early 1970s, when questions began to surface about the possible adverse health effects associated with electric fields produced near power lines. In response to these questions, numerous studies on the issue have been conducted. When research found no significant effects, the focus shifted toward the possible adverse health effects of magnetic fields.

The major research on EMF and potential health effects has been performed in the following four areas: 

Epidemiology
Epidemiology is the science that attempts to establish patterns, links or association between disease causing agents and diseases in human populations, such as cancer or leukemia. However, the epidemiological evidence for a relationship between exposure to low frequency (60 Hz) EMFs is inconsistent, ranging from weak to non-existent.

Animal Studies
Animal studies are used to determine if there are any biological effects of EMF on animals to determine if exposure causes cancer in rodents, for example. Numerous studies have been performed on animals at a variety of exposure levels over several generations. The data does not support a conclusion that exposure to 60-Hz EMF has an effect on the frequency or pattern of cancer.

Biological Studies
Biological studies are used to detect EMF responses on individual cells or DNA and determine if magnetic fields cause damage to cells. There is no consistent evidence that EMF exposure damages either cells or DNA. Generally, cancer initiation is caused because DNA has been damaged, but the results of EMF exposure to cells and DNA have been negative.

Clinical Studies
Clinical studies test the exposure of human volunteers to EMF levels higher than generally encountered in residential or work environments. Human responses have been detected at extremely high field strengths, but generally do not correlate or show association with health hazards.

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