Questions & Answers About ElectroMagnetic Fields

Q: What are Electro-Magnetic Fields? A: Electro-magnetic fields (EMFs) are invisible lines of force that surround any electrical device. EMF's are present adjacent to various power sources such as power lines, lamps, and household appliances, and have been prevalent for decades. An electrical device that is plugged in but not turned on emits only an electric field; however, once the device is turned on, a magnetic field is produced as well, and it is called an electro-magnetic field. EMFs are strongest at the source and dissipate rapidly with increasing distance. Q: Why are EMFs a subject of concern? A: Electric fields alone create electrical charges on or near a person's body; EMFs, however, actually pass through the body and induce electrical currents within a person. Concern arose over the effects of EMFs after the publication of a 1979 study which reported that children living near power lines may have higher rates of cancer. Currently, no definitive scientific link has been established. Moreover, an intensive study published in the influential New England Journal of Medicine in July, 1997, strongly rejected any connection between EMFs and cancer. Q: Have any legal steps been taken regarding EMFs? A: Most lawsuits over EMFs have involved plaintiffs who claimed that power lines on or near their property caused them to develop cancer. Some states have established limits on EMFs transmitted from power lines and California prohibits high voltage lines from being located within a specified distance of schools. Q: Why should REALTORS be concerned about EMFs? A: Buyers' concerns over EMFs may have a depressing effect on the value of property located near power lines. If EMF measurements exist for a property, REALTORS should encourage disclosure of such information to prospective buyers. For property near high voltage power lines, REALTORS should inform prospective buyers that property values may be affected and that there are unproven public health concerns about long term exposure to EMFs.