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Comment by jb775 | Hacker News Reader

I think you're wrong. I did extensive research on this prior to purchasing a home recently and the general consensus I found is that you need a pretty advanced water filtration system consisting of carbon + reverse osmosis filtration that requires yearly servicing. Some water companies do this, but most probably don't. You can also have a system installed in your house.

Your standard Brita filter doesn't even come close to filtering these chemicals.

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This is not true. The NSF/ANSI standard 53 specifies that filters must remove PFOS/PFAS[1], and both reverse-osmosis (RO) units /and/ granulated activated carbon filters are certified under that standard. Granulated activated carbon filters are the same kind found in Brita filters.

For example, Samsung RWP70010TWW is a refrigerator filter approved[2] for filtering PCBs, PFOS, and PFAS, as well as a whole host of other things. You don't need to spend ten thousand dollars installing a reverse osmosis system to get clean water.

1: https://www.nsf.org/knowledge-library/perfluorooctanoic-acid... 2: https://info.nsf.org/Certified/DWTU/Listings.asp?ProductFunc...

An under-sink RO system is only $200 in hardware, and I'd estimate (from my own) costs about $40/yr in service.

It’s the distillation that gets rid of everything else, not the filtering

AFAIK, distillation will not remove volatile organics that have a lower boiling point than water(well, theoretically you could do some fractional distillation technique, but its easier to just run a carbon filter).

any thoughts on the berkey?

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