Electric and magnetic fields (EMFs) are invisible areas of energy, often referred to as Radiation, that are associated with the use of electrical power and various forms of natural and man-made lighting. EMFs are typically grouped into one of two categories by their frequency:

    • Non-ionizing: low-level radiation that is generally perceived as harmless to humans
    • Ionizing: high-level radiation that has the potential for cellular and DNA damage

During the 1990s, most EMF research focused on extremely low-frequency exposures stemming from conventional power sources, such as power lines, electrical substations, or home appliances. While some of these studies showed a possible link between EMF field strength and an increased risk for childhood Leukemia, their findings indicated that such an association was weak. The few studies that have been conducted on adults show no evidence of a link between EMF exposure and adult cancers, such as leukemia, brain cancer, and breast cancer.

Now, in the age of cellular telephones, wireless routers, and the Internet of things, all of which use EMF, concerns persist about possible connections between EMF and adverse health effects. NIEHS acknowledges additional research is needed and recommends continued education on practical ways to reduce exposure to EMFs.

Does my cell phone emit EMF radiation?

Cell phones emit a form of radiofrequency radiation at the lower end of the non-ionizing radiation spectrum. Currently, scientific evidence has not conclusively linked cell phone use with any adverse human health problems, although scientists admit that more research is needed.

The National Toxicology Program (NTP), headquartered at NIEHS, conducted toxicology studies in rats and mice to help clarify potential health hazards, including cancer risk, from exposure to radiofrequency radiation like that used in 2G and 3G cell phones. Please visit the Cell Phone Radio Frequency Radiation webpage to learn more.

It is important to remember that the strength of a magnetic field decreases dramatically with increasing distance from the source. This means that the strength of the field reaching a house or structure will be significantly weaker than it was at its point of origin.

For example, a magnetic field measuring 57.5 milligauss immediately beside a 230 kilovolt transmission line measures just 7.1 milligauss at a distance of 100 feet, and 1.8 milligauss at a distance of 200 feet, according to the World Health Organization in 2010.

For more information, see the NIEHS educational booklet, “EMF: Electric and Magnetic Fields Associated with the Use of Electric Power

Source: niehs.nih.gov ~ Images: niehs.nih.gov

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