<p>How do I test for contaminants in my soil? I know there are places I can send my samples to, but I want to test it myself. Is there a way I can determine whether contaminants are present in my soil based on the pH? For example, can I assume that contaminants are present if my pH is too high, or too low? Thanks… It would also be nice if you knew how to test for trace minerals in soils.</p>