6 June 2023

Why is water so important in preparing an espresso?

Along with roasted and ground coffee, water is the primary ingredient in preparing an espresso. In fact, it represents 92% of its composition, which means the quality of the water has a direct impact on the quality of the coffee we drink. Water can enhance or eliminate acidity, add body or leave it flat, and alter the flavour of an espresso

Water quality and composition vary depending on the source, whether it’s from rivers, lakes, swamps, dams, or underground sources. The minerals present in the water affect its smell and taste, and good quality water is an essential part of the perfect cup of coffee. Among the minerals present, calcium, magnesium, sodium, potassium, bicarbonate, sulphate, and chlorine contribute to the flavour and can create different sensations in the mouth.

Chlorinated water is not suitable for coffee preparation because it requires filtering to recover a neutral flavour. Hard water, which contains high levels of magnesium and calcium salts, can cause lime and gypsum deposits to form in coffee machines, leading to malfunctions and breakdowns.

The pH of the water is another crucial element to consider, specifically in the coffee extraction phase. Water with a neutral pH, between 6.5 and 9.5 on the scale, is ideal for human consumption. Water that is too acidic or alkaline affects the taste of the coffee.

In the case of coffee machines connected to the water supply, the substances used to treat the water can give a chlorine, corky, or sour taste. The pipes and metals in the mains add particles to the water that also affects the coffee’s taste and smell.

Azkoyen espresso Coffee machines are designed to extract espresso that meets the highest standards. The company pays great attention to the quality of the water used in their machines, recommending the use of professional filters that can be adjusted to address the hardness and pH characteristics of the available water, guaranteeing consistent, high-quality espresso.

In summary, water quality is a critical factor in the preparation of espresso. The minerals present in the water affect the taste and aroma of the coffee, and water that is too hard or has an unsuitable pH can cause problems in coffee machines.

Azkoyen  espresso coffee machines address these issues by providing professional filters that guarantee consistent, high-quality espresso.