Swiss Water Decaf Ground Kona Coffee. The Swiss Water Process is the only method of that is completely chemical-free. If you prefer your coffee processed with as few chemicals as possible, youll be happy to know our decaffeinated Kona Coffee is Swiss Water Decaffeinated. Some of our customers mix our Decaf Kona half-and-half with regular Kona Coffee to reduce caffeine. Great for after dinner if caffeine affects your sleep.