bongs filter out the some shit but not thc...thc is not water soluible so it is not broken down in the water...the only thing that would effect thc is certian kinds of alcohol
endo..jay Reviewed by endo..jay on . How Much Does Bongwater Really Filter Out? How Much Does Bongwater Really Filter Out? In my estimation, smoking weed, in terms of actual smoke damage to the lungs, is as dangerous as smoking an unfiltered cigarette. In your estimation, how much do you think pulling the smoke thru water decreases it's toxicity? Rating: 5