What kind of water should be used to extract coffee?

1. Freshness means that the water is rich in oxygen and vitality. And to start with cold water, it is best not to use cold water directly. 2. Tasteless, many cities with poor water quality have high levels of phosphorus and chlorine in their tap water, which leads to a strong flavor and a heavy impact on the taste of coffee. 3. The acidity is very easy to understand. The best bubble water is neutral water with a pH value of 7.