Coffee Brewing and Water Quality
Though the spotlight is often on the coffee bean itself, water plays a pivotal role in determining the quality and character of a cup of coffee. Given that a cup of coffee is roughly 98% water, paying attention to the quality and composition of the water you use is essential.
The Chemistry of Flavor
Water acts as a powerful solvent during the brewing process, extracting the myriad of compounds that give coffee its unique characteristics. Drawing out the intricate flavors and aromas of your coffee requires the right water. Let's dive deeper into what that means.
The mineral content of water can significantly alter your coffee's taste profile. Hard water, rich in calcium and magnesium, may reduce the perception of acidity and unintentionally promote bitterness. Conversely, overly soft water may lead to a flat and uninspiring cup.
Moreover, water's pH level—its acidity or alkalinity—also affects flavor. For most coffees and brewing methods, we recommend a target pH of 7 (neutral).
Chlorine, often used for municipal water disinfection, can introduce off-flavors and unpleasant aromas. Even trace amounts might disturb the delicate balance of flavors within a brew.
Optimal Water for Brewing Coffee
Optimal brewing water strikes a much-needed balance: it should contain an adequate but not excessive mineral content to enable proper flavor extraction while remaining free from undesirable impurities. For most coffees and brewing methods, we recommend 150–200 parts per million (ppm) for total dissolved solids (TDS)—a measure of water's mineral content.
Unlocking Coffee's True Potential
Given that a cup of coffee is roughly 98% water, paying attention to the quality and composition of the water you use is essential. Investing in simple water filtration can dramatically improve your daily brew by removing chlorine and other common tap water contaminants.
You might also consider experimenting with different water types and their mineral compositions. Experimentation is a great way to unlock a richer and more nuanced expression of coffee, allowing the true character of your favorite beans to shine through.
