Because there is no scientific basis to conclude the EMF poses any health risk, there are no federal, State of Nevada, or local laws, standards or guidelines pertaining to the levels of EMF from power lines. EMF comes from both natural and man-made sources. The earth is the largest single source of electric and magnetic fields. Electricity produces two types of fields. Electric fields are created by voltage.
Magnetic fields occur when current flow through a wire.
The stronger the current, the stronger the magnetic field. An appliance wire that is plugged in has an electric field even when the device is turned off. Turning the appliance on causes current to flow, creating a magnetic field. The strength of a field depends on the voltage level and the amount of current flow. The amount of current flowing through a power line varies as the demand for electric power changes.