How can water impurities affect coffee?

Water impurities can impact the extraction process of coffee, which is essential for developing its flavor profile. When water used in brewing contains impurities such as chlorine, minerals, or other contaminants, these can interfere with how the coffee's natural flavors are extracted from the coffee grounds. Instead of allowing the nuanced flavors to shine, impurities can mask or dull these characteristics, resulting in a less vibrant and balanced cup.

For optimal coffee brewing, purified water is recommended because it helps in achieving a clearer flavor profile that showcases the intended taste notes of the beans. This understanding is crucial for anyone aiming to brew a high-quality cup of coffee, making it clear why impurities would have a negative effect on taste.