Don't take this the wrong way, but water can be harmfull too. Life is too short to worry about every little contaminant out there. I enjoy my food and will eat what tastes good. My family seems to be long lived and we have for generations been known for our feasts and none of us will ever be told we are under weight, if you know what I mean. But have been pretty healthy and cook on grills or in grease at a majority of our meals.
If you want to watch all the hazards of eating then thats great but as for me, when the good Lord calls I'll be ready and full. That is good info too. Again I'm not trying to tell you the info isn't wanted or appreiciated, I just hear how this, and that, and everything else is harmfull and want to say keep this in perspective, and remember us humans have survived for many centuries cooking over fire in far worse sanitary conditions and we aint died off yet.
I thought I was wrong once, but I was mistaken.
(3)WSMs, 22.5" CharBroil kettle,
4'offset (gave away after 1st WSM cook)