A cup of coffee is about 98 percent water, which is why it is only logical that the quality of the water used has a decisive influence on the coffee enjoyment. Hard water in particular can have a detrimental effect on the taste. However, the quality of tap water differs greatly from city to city and region to region, which is why a closer look at your own water values ​​makes sense.

Determine hardness of the water

An important criterion for determining the water quality is the water hardness. These can be found at your local water supplier or on various sites on the Internet. In addition, you can also determine the hardness of the tap water with test strips from various suppliers. The higher the degree of hardness, the more minerals are in the water.

What is the optimum water for making coffee?

For best coffee flavor, use water with a hardness of 8 to 12 ° dH and if this water has a pH of 7. Soft water with a low degree of hardness increases the intensity of the acid and bitter substances in the coffee, which makes it both sour and bitter taste. Too hard water, on the other hand, neutralises the acid and your coffee loses its aroma.

When does a water filter make sense?

In some coffee machines, a water filter already exists and must be replaced after prolonged use. These water filters should ensure that the usually too hard tap water is softer after the filtering process and thus the coffee tastes more aromatic. If no automatic water filter is installed on your fully automatic machine and the tap water in your region is too hard, you can resort to the cheap table water filter and thus improve the water quality.

Instead of using a filter, some coffee lovers rely on mixing in soft mineral water. However, this results in higher costs and the adverse impact on the environment should not be completely ignored. Finally, it is advisable to let one’s own taste decide whether an appreciation of the water quality is even necessary.