What qualifies as "Decaffeinated" for coffee? July 11, 2022 04:32 Updated The decaffeinating process must reduce the caffeine levels in the coffee by at least 97% to qualify as decaffeinated. However, all of our Swiss Water® Decaf coffees are 99.9% caffeine-free! Learn more: How Much Caffeine Is in a Cup of Coffee? Related articles What are the differences in coffee beans? What makes Espresso different then regular roasted coffee?