Why it is better to do without tap water

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Of: Tobias Hinne-Schneider


If you fill your coffee machine with tap water, you lose the best taste. But with a tip, your coffee will become a real pleasure.

Hamm – Coffee plays a major role in many people’s diets – they consume the hot drink every day. Why not? More than 800 aromas ensure an incomparable drinking pleasure that coffee connoisseurs no longer want to do without. For example, wine only has 400 aromas. But to get the best taste from your coffee, there are a few things you need to pay attention to, wa.de reports.

Coffee black, psychotropic, caffeinated drink made from roasted and ground coffee beans
origin The coffee tree comes from Africa
cultivation Coffee is grown in more than 50 countries around the world

Making coffee: this is why tap water should be avoided

Not only the quality of the coffee bean or the functionality of the machine play a role, but also the properties of the water used. Although the tap water in Germany is of drinking quality, it is by no means optimal for the preparation of coffee.

Factors such as water hardness and pH have a decisive influence on the final taste of the coffee. Thomas Steinke is head of the coffee academy at coffee roaster Dinzler in Irschenberg, Bavaria – he explains what’s important: “The ideal hardness range is between five and eight levels of carbonate hardness.” This is where the flavors come into their own. Too soft water lets acids dominate in the coffee, and harder water pushes bitter substances to the fore.

Making coffee: which is the best? Water filter or flow filter?

Thomas Kraft of the German Barista School in Fürstenfeldbruck gives dpa a carbonate hardness of 3 to 6 and a pH of between 6.5 and 7.5. The water that comes directly from the tap is therefore clearly too calcareous.

A professional water filter is optimal for good coffee, but even a normal commercial circulation filter can help increase the taste. “It’s definitely better than taking the water out of the tap,” Steinke says. And it’s not just coffee that benefits from filtered water – the machine doesn’t calcify as quickly either.

Barista Thomas Kraft recommends a permanently installed filter system at the point of water extraction. “These filters offer much more convenience and, in the long run, are also less expensive than tabletop filter systems.”

Make coffee: ask the water supplier

Local water suppliers tell you how hard tap water is in your own place of residence. Either directly on their website, or on request. If you want to know exactly, you can also have a sample analyzed in the laboratory.

Also important: the water must be fresh. So if you have a fully automatic machine with a large tank, it is best to change the water regularly. Portafilter machines with a larger brewing vessel also benefit from regular water changes.

If you fill your coffee machine with tap water, you lose the best taste.  These tips will make your coffee a real pleasure.
If you fill your coffee machine with tap water, you lose the best taste. These tips will make your coffee a real pleasure. © Nicolas Armer/dpa

Making coffee: Can you use tap water?

Some swear by bottled mineral water: “It’s definitely an option”, says Thomas Steinke. Especially in areas where the water is chlorinated. But: “I also have to make sure that there is lime in it.” Regular cleaning of the machine with a water filter or mineral water is therefore not spared.

Many people drink their coffee with a little milk. It belongs in the refrigerator, no one doubts that. But it is crucial to know where it is stored. A mistake is made very often. While milk can currently be easily obtained in the supermarket, other products are becoming scarce: after honey, oil and flour, there is another product that is difficult to find. (with dpa material)

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