[dunham]

I buy from thespicehouse.com - they seem to be careful, but I haven't inquired about turmeric. I should send them an email. (I prefer them over Penzey's, which is the same family, because they have dried fenugreek leaves.)

[RhodesianHunter]

If you don't have or provide any insight into their testing processes, I don't think a recommendation is relevant here.

[x0x0]

I buy from there too.

Here's their answer and it's disappointing. tl;dr: they import the whole spice and have it ground in the US.

https://www.thespicehouse.com/pages/ingredients-and-allergy-...

forget trusted suppliers; they should be running lab tests on random samples

[marze]

I emailed Bill Penzey a few years ago, asking if they did testing for lead in their turmeric, got no response.

[EricE]

seconded - high quality and friendly service. Hard to ask for more.

[autoexec]

Unless you maybe want to ask for proof that they test their products for lead. That seems pretty easy.