Water knowledge

Piz Sardona Academy

What is in a glass of water? Here we answer the most common questions about drinking water — factually, free of myths, and with an eye for what makes a good mineral water.

Interactive tool

How much water do you need per day?

The intake calculator works out your personal guide value — from body weight, age, exercise and temperature, based on common rules of thumb.

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30–35 mlper kg of body weight · rule of thumb

Water knowledge

True or not?

Six claims about water. Three of them hold. After each answer you can see where the verdict comes from.

Question 1 of 6

Distilled water makes body cells burst.

All articles

Water knowledge · 7 min

Still water: more than water without carbonation

What sets still water apart and how to recognise quality on the label. With pairing advice for food and wine, plus a myth check.

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Water knowledge · 6 min

Spring water or mineral water? The difference is defined by law

Spring water or mineral water? Learn how Swiss food law separates the two categories and how to recognise them on the label.

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Water knowledge · 6 min

Drinking hard water: safe – what hardness really means

Why hard water is safe to drink and what the Swiss °fH scale tells you about calcium and magnesium in your water.

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Water knowledge · 6 min

Can you drink distilled water?

Small amounts of distilled water are harmless and the burst-cell story is a myth. Why it still makes no sense as an everyday drink.

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Drinking habits · 6 min

Can you drink too much water?

Drinking too much water is possible but rare. How hyponatraemia develops and which amounts healthy people can treat as safe in everyday life.

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Drinking habits · 6 min

Not drinking enough water: how to recognise the symptoms

How to spot the early signs of not drinking enough water, and why the sensation of thirst grows quieter with age.

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Mountain & Origin · 6 min

Piz Sardona: the mountain behind the water

Piz Sardona: 3,056 m border summit in the UNESCO World Heritage Tectonic Arena and origin of a mineral water filtered for around 12 years.

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Water knowledge · 6 min

What is alkaline water?

Alkaline water has a pH above 7. What determines that value, how natural water differs from ionised water, and what it can really do.

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Water knowledge · 6 min

Kangen water: what’s behind the trend

Kangen water explained factually: how water ionisers work, why the pH they produce soon drops again and what is scientifically proven.

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Water knowledge · 6 min

Artesian water: when the spring rises on its own

Artesian water rises without a pump. How artesian springs form, why they are so well protected and where the largest reserves lie.

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Water knowledge · 6 min

Glacier water: what is really in the bottle

Glacier water is seen as pure, yet it is usually very low in minerals. What the term means and how it differs from natural mineral water.

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Drinking habits · 6 min

Drinking warm water: what it does – and what it doesn't

Drinking warm water is mainly a matter of comfort: what the morning ritual really does, where it comes from and why “detox” is not a bodily process.

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Comparison & choice · 5 min

Best mineral water: what really tells you about quality

There is no single best mineral water. But there are clear criteria: mineralisation, calcium, magnesium, sodium and pH. How to read any label.

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Comparison & choice · 5 min

Swiss mineral water: what makes the springs of the Alps special

Why the Alps make Switzerland a land of water: geology, strict regulations, short transport routes and the diversity of Swiss mineral waters at a glance.

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Water knowledge · 6 min

PFAS in water: what a laboratory analysis shows — and what it does not

What PFAS are, why they are regulated and what a laboratory analysis says: why ‘no traces detected’ means something other than ‘not present’.

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