I’m not going to filter out something that I’ll then have to pay to consume again.
As a specialist in social and preventive medicine, I can fully understand this line of thinking.
The most important minerals found in tap water are probably magnesium and calcium.
So let’s take a look at how much of these two minerals is contained in drinking water (the values may vary from municipality to municipality):
Magnesium: 4–30 mg/l (examples: Arosa and Recherswil) => approx. 20 mg/l
Calcium: 8–120 mg/l (examples: Arosa and Risch) => approx. 65 mg/l
Let’s now put this into perspective with the recommended daily intake for an adult:
Magnesium: 300–400 mg/day => Ø 350 mg/l
Calcium: 1000–1200 mg/day => Ø 1100 mg/l
It follows that we need the following amounts of tap water per day to meet an adult’s daily requirement:
Magnesium: 350 mg / 20 mg/l = 17 litres of tap water
Calcium: 1100 mg / 65 mg/l = 17 litres of tap water
Enjoy drinking 17 litres of tap water a day...
Whether you drink tap water or not, you must make sure you get enough magnesium and calcium from other sources. Here are a few recommendations:
Magnesium: Oatmeal (130 mg/100 g), Brazil nuts (360 mg/100 g), hemp seeds (650 mg/100 g), soya beans (220 mg/100 g) and cocoa (480 mg/100 g)
Calcium: hard cheese (1000 mg/100 g), yoghurt (130 mg/100 g), kale (200 mg/100 g), broccoli (200 mg/100 g), almonds (260 mg/100 g)
Tip:
You’re thoughtlessly throwing away the purest and most concentrated source of calcium and collagen.
These are eggshells, or rather eggshell membranes.
Why not collect your eggshells along with the membranes, boil them and dry them in the oven at <120°C.
Then grind them in a mortar or grinder and add the powder to your salt, your spices or your muesli. Just 1.5g of this is enough to meet your daily requirement.
Conclusion:
There are more efficient and purer sources for meeting your daily mineral requirements than tap water.
That is why I recommend – especially for children and the elderly – filtering tap water to remove the substances it contains, so that you do not ingest nitrates, nitrites, heavy metals, medicines, hormones, PFAS, microplastics, etc.
I have developed a number of devices for this purpose, which you can install discreetly in your kitchen plinth so that you can conveniently drink purified water straight from the kitchen tap.