Like a daily dose of coffee, here’s your daily dose of coffee science: If your coffee tastes different from day-to-day, it’s not because of how you brew it or how much coffee you use. It’s because of the water.
Yes, water. We all just think of coffee as being coffee, but the coffee beans and grounds need that liquid to make a delicious cup. Depending on the water you use, and also where you live in the United States, the taste of your coffee can vary from cup-to-cup.