Asbestos tiles can usually be identified by their size.
- They are smaller than tile today typically, and are either 8x8 or 10x10.
- If your tiles are this size, they may be asbestos.
Unless the tiles are damaged or flaking in any way, the asbestos is bound in the product and probably not a concern -- but better safe than sorry, in my opinion.
The best thing to do is take a small sample and send it to a lab for testing. If you are concerned still, have the tiles removed professionally and replaced with something nontoxic like cork, linoleum, or ceramic/porcelain tile.
For more information:
Read "Are national funds available for taking off or covering old asbestos siding? How hazardous is handling old asbestos siding?" a Q&A answered by Rick Goyette.
Also, read "How do I know if the tile in my home is toxic?" a Q&A answered byGennaro Brooks-Church.