I bought an EM meter when we were house hunting a couple years ago. I had always heard that the high voltage power lines are a concern. They may be, but the EM strength varies as a square of distance, so it drops off pretty fast. What I did find out is that regular street power lines produce a high EM signal at the houses near them. Cell phones have a different electromagnetic characteristic (I can't remember the difference between the straight magnetic field from power lines and the cell phone energy). My conclusion is that the EM affects from power lines is probably very, very low, or there would be widespread health effects, since the street power line signals are high for so many houses.
I bought an EM meter when we were house hunting a couple years ago. I had always heard that the high voltage power lines are a concern. They may be, but the EM strength varies as a square of distance, so it drops off pretty fast. What I did find out is that regular street power lines produce a high EM signal at the houses near them. Cell phones have a different electromagnetic characteristic (I can't remember the difference between the straight magnetic field from power lines and the cell phone energy). My conclusion is that the EM affects from power lines is probably very, very low, or there would be widespread health effects, since the street power line signals are high for so many houses.