Hi csilverdds,
That would really depend on how you define “non toxic” because each person may have very different ideas about “how safe is safe enough”. For some … memory foam or polyfoam that is CertiPur certified is “safe enough” while others may consider both to be “toxic” by their personal definition (or just be more sensitive to some of the chemicals in them than others).
Post #2 here has more information and links to resources that will give you much more information about a very controversial subject. Knowing what is in your mattress (in terms of materials and the method used to make it fire retardant) is important if “safe” or “non toxic” is a primary issue and your definitions, chemical sensitivities, needs, or even just preferences are different from most.
Post #2 and #4 in this thread has some of the better options I’m aware of within a reasonable drive of Hartford.
Phoenix