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Comment by akaru | Hacker News Reader

They drink more if they are formula fed and use that as a water source.

Again, it is physically impossible for an infant to drink as much water as an adult.

They drink more as a percentage of ingested materials. They are small and suffer increased effects.

True. I wouldn't give a baby anything that doesn't have a safe chain of custody and history of purity and reliability. Even in the 1970's from whence I came, my parents didn't trust tap water for anything more than brushing teeth and showering because the water had floating crap (scale) in it and high hardness.

Personal water intake history:

70's - 1993: Name brand bottled water from grocery stores

1993 - 1997: Self-service distilled or reverse osmosis water store, and remote pump at home

1997 - 2001: Carbon block, multi-stage, under sink filtration

2001 - 2018: Add reverse osmosis

2018 - present: Add UV stage

PSA1: Alkaline water is a scam

PSA2: Buy a water softener, whole house filter system, under-counter RO system, and maybe an indoor tankless water heater together on a wink-wink commercial purchase order (taxable) and have it freighted to your driveway (liftgate charge). It saves thousands on plumber markup and allows buying a TCO cheaper and better system.

People have been drinking hard water for a long time. Seeing as the whole population of a place like Copenhagen hasn't keeled over or shown any particular health issues in general I'm going to come down on the side of it's fine for health but annoying for appliances. I've got a filter for tea water for taste preference. The level's you're going to seem a bit extreme, are they a waste of your time and money?

There’s plenty of evidence that many of the minerals in hard water are beneficial. I use mineral drops to reharden my RO water after removing the flouride, and hexavalent chromium in my tap water.

I am not following how your point is relevant. Dosages are different for kids and adults. Even different for kids of different sizes.

That's true but infants are far smaller than adults. It takes a lot less (of anything) to have an effect on an infant.

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