See also "Ground Turmeric as a Source of Lead Exposure in the United States": https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5415259/ The problem with lead in tumeric seems to extend beyond Bangladesh.
Yikes. Are their any trustworthy, mainstream sources of spices in the U.S.? E.g., if I buy turmeric from Walmart or Whole Foods, can I safely assume that they're monitoring the product streams for lead? EDIT: I just saw a sibling comment about a company named "American Turmeric". I'm curious about more mainstream sellers, who might possibly monitor other spices as well. I'd prefer to not play whack-a-mole on a spice-…
If you're not taking it in supplement quantities, then I'm not sure I'd be tremendously worried about any other contamination...