The story of real water

Water has a history, and for most of it nobody had to think about this at all.

Where it came from

Rain falls carrying almost nothing. It becomes interesting on the way down — moving through limestone, granite and sand, dissolving a little of everything it passes.

By the time it surfaces at a spring it carries a profile written by the specific geology it travelled through. Calcium, magnesium, potassium, bicarbonates. That composition is why spring water from two valleys tastes different, and why people have always had opinions about wells.

Then it came through a pipe

Municipal supply solved the problem that actually killed people — waterborne disease — and it deserves more credit than it gets. But treatment and distribution added chlorine, and ageing infrastructure added things nobody intended.

Tap water became safe and stopped being trusted. Those are different properties, and the gap between them created a market.

So we bought it in bottles

Bottled water sold the memory of the spring. Mountains on the label, mineral analysis on the back — because even then, the minerals were understood to be the point.

A good deal of it, though, was municipal water that had been demineralised and then partially remineralised. The label described a mountain. The process described a factory.

And then we bought a membrane

Reverse osmosis arrived in Indian homes as an answer to a real and specific fear. It works, and it removes what you want removed.

It also removes everything else, and discards roughly 60% of the water it touches. Neither of those was hidden. They simply were not what anyone was competing on. The category competed on how low the number went, and the number went low.

Two decades of that produced a settled national belief: pure means empty, and empty means good.

What was actually lost

Not much, per glass. A few dozen milligrams of calcium. Some magnesium. Bicarbonates that kept the pH level and the taste round.

But water is the thing you consume more than anything else, thirty-odd times a day, every day, for a lifetime. Small and constant is how water has always worked on the body — and how it works in reverse when the contribution stops.

Where it goes next

The interesting development is not a better membrane. It is not needing one.

Selecting by electrical charge rather than filtering by size makes it possible to take out what is harmful and leave what is not — which is what a spring does, by accident of geology, and what no domestic purifier has previously been able to do on purpose.

Water that keeps what the earth put in it is not a new idea. It is the oldest one there is. It has simply been unavailable from a tap for a very long time.