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Comment by nonrandomstring | Hacker News Reader

Perhaps you can tell us the magical way that PFAS is currently removed in commercial water treatment?

Certain technologies have been found to remove PFAS from drinking water, especially Perfluorooctanoic acid (PFOA) and Perfluorooctanesulfonic acid (PFOS), which are the most studied of these chemicals. Those technologies include activated carbon adsorption, ion exchange resins, and high-pressure membranes. These technologies can be used in drinking water treatment facilities, in water systems in hospitals or individual buildings, or even in homes at the point-of-entry, where water enters the home, or the point-of-use, such as in a kitchen sink or a shower.

> Certain technologies

Actual ones. Actual ones in use right mow in your neighborhood? In use on the water you're drinking today?

Reverse osmosis water filtration systems that use activated carbon are pretty common, and least where I live. We have one under our kitchen sink, and so do my in-laws. Most refrigerators that include a water dispenser come with an activated-carbon-based water filter as well.

That's nice that you've got that in your home.

But at scale? For the rest of us?

I live in a "developing nation" [0] of 70 million people whose private water companies are fined billions every year because they cannot meet the most basic standards of supplying potable water and not dumping raw sewerage into the rivers and sea.

[0] https://www.theguardian.com/commentisfree/2013/dec/09/britai...

I’m not sure what point you’re trying to make anymore. You asked if people actually have these things. We do. Why does this need to scale? If you want to be pedantic, anyone can make themselves an activated charcoal water filter using fire, wood, half a plastic bottle and some rocks and straw and stuff. If you’re on the Internet you already have access to this knowledge.

Downvoting my question will make it go away. It will not make the problem go away.

I thought it was a fair question

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