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About the right time to mention the associated Penn & Teller "Bullshit" episode.

Yeah, water tastes different from different sources. I can tell that by drinking water from my well, then drinking from the city water source. However I am also not willing to pay for that difference.

I wonder if there are kits you can buy in the store to measure water quality like bacterial hard/soft etc. Would be nice if there was a built in mechanism to upload tap water data with GPS coords which would then show on an online map

I don't think people's reaction to the water sommelier is derision — maybe more "what kind of idiot do you take me for?"

Right so don't mock the som, mock the people buying into it, right?

Don't Mock the Water Sommelier