One can get an EMF reader from Fry's Electronics and can measure EMF readings.
Starfish prudent to do so.
There are great studies done, based on Age of Kid, Person and Bone Density.
Bone density determines EMF factors.
You will hear a lot of debates on this. Resale is what you will also want to take into consideration, because if you are questioning it, so will others.
All the best to you.