We recently received the following inquiry regarding NSF 53 and VOC's: "I am primarily interested in filtering VOCs from my drinking water. It is my understanding that NSF/ANSI standard 53 addresses this issue. However, I have noticed that some Standard 53 filters claim VOC filtration, others do not. My question is, in evaluating filtration systems (RO, carbon block, etc., etc.), do I simply go by the claimed NSF/ANSI standard, 53 in this case, or is there more to it than that?"
We suggest contacting each manufacturer for a list of the contaminants their system(s) will remove or reduce. As far as we are concerned, if a company does not flat out state that their unit will remove or reduce specific contaminants, then we do not ever assume their unit will do anything to lower levels of those contaminants in a water supply.
Check out the NSF web site for 'official' information on water filtration devices and what they are NSF certified to remove/reduce.
http://info.nsf.org/Certified/DWTU/ -- This page contains a search function that you can use to research specific manufacturers and products currently certified by the NSF for the removal and/or reduction of water contaminants.