Hi farrisdannean,
Welcome to the Mattress Forum! 
You can see some comments about innersprings and electromagnetic (EMF) fields in posts #2 and #3 here. It’s certainly not something that would concern me in any way.
I’m certainly not a health professional or an expert in electromagnetic fields but EMF fields from mattress innersprings are a very controversial subject and there are certainly some people that believe they are harmful although I’m not one of them. I have seen and read article that make comments about innersprings being a “health” issue because of electromagnetic fields, but I have never seen any specific evidence that is compelling to me and most of these types of articles use some very non specific anecdotal stories or what I would consider to be some questionable correlations that don’t provide any clear evidence that would directly relate to innersprings or metal frames. I would personally be more cautious with “active” electromagnetic fields (such as living close to high tension wires, holding a cell phone too close to your head, or sleeping near active electrical fields or wiring as examples), but I personally wouldn’t have any issues with sleeping on an innerspring in terms of health or safety (although I recognize that there are certainly others that have a different opinion).
A forum search on electromagnetic (you can just click the link) will bring up more comments and feedback about EMF’s as well.
Phoenix