I've alluded to the fact that I spent many years working on a nation-wide(US) water testing project once and that I don't own the results, they were never published, and I can't specifically give away those results that I don't own. All of this recent talk about PFAs in water is absolutely killing me. This new water testing is going to take place over the next three years, and it's important to note that it's *only* talking about a handful of chemicals.

I've found that particularly US-based people really think their water is great and vastly overestimate how great it is. It comes out of the tap, you drink it and you don't die of waterborne illnesses. Woohoo. Really, it's an accomplishment.

But until you spend time in a water testing lab you don't really begin to realize how much isn't tested for in that water you drink and bathe in. It's just not possible.

People would ask me all the time "How do I get my water tested for everything?" You can't. Think of the story recently about how many chemicals are in plastics, for instance. 16,000-ish and over 4,000 that are potentially hazardous. Basically zero of those are tested for in any way whatsoever. To get something tested, someone has to care enough that it's there in the first place. Then someone has to create testing procedures and standards. Then there has to be a market for that test.

Let's JUST talk about PFAs. You know how many there are? Ballpark is ~15,000 different PFAs. You know how many are tested in this new EPA program? 25.

Now that we've established that, just how likely is it that testing will find PFAs in YOUR water in the US?

ewg.org/interactive-maps/pfas_

Pretty likely.

While I can't really talk about what states are likely to find if they honestly look, what I do talk about, and have for probably 20 years now, is what I did when I realized what's really in your water. I put in a whole home filter outside of our home to filter out a lot of stuff for showering and hand washing. No one so much as cleans vegetables here unless the water comes from the reverse osmosis system in our kitchen. Drinking water, ice, pasta water, fruit and veggie washing water, etc all comes from that.

I'm very sensitive to the fact that not everyone can do all of that. It's a step in the right direction that the EPA is beginning to do something about this, but it's far later than it should be and doesn't go nearly far enough. All I can say is that you should demand better, and not just about PFAs, but all contaminants in your water supply.

And before anyone asks, yes, the spring water on the homestead is about as clean as you can find anymore. Under 10 TDS and no contaminants that I've found to date. Again, can't test for everything even if you wanted to and had a million dollars to throw at it. It was a major selling point on the property for us.

@BE I only drink water that's been through a British Berkefeld gravity filter (ceramic 10 micron? and activated charcoal).

Would that get rid of PFAs or are they ionically dissolved and therefore impossible to get rid of by filtration (or just potentially too tiny)?

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@davep

That's a great question, and to the best of my knowledge I don't think either of those would remove a high percent of PFAs.

I wasn't familiar with this filter, so I dug into it just a little bit, and it seems more geared towards heavy metal removal, while it does do other things.

doulton.com/products/ultra-ste

If you can find specs on it that specifically list amounts of different materials it filters out, link to it here because now I'm curious about it.

@BE Here's some data for their pressurised systems (which should be similar). They've had proper independent testing done too, I'll try to root that out.

doulton.com/en-fr/pages/test-d

@davep

OK, so, better on some organics than I would have thought, but, nothing specifically on PFAs after a quick look through.

It's certified for NSF/ANSI 401 which NSF says is:

"This standard offers up to 15 specific contaminant reduction claims. Some of the most popular categories include prescription drugs, over-the-counter medications, herbicides, pesticides and chemical compounds."

nsf.org/knowledge-library/nsf-

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