In Bermuda our main water source is rainwater collection. All those beautiful whitewashed roofs serve as a collection area for the rain and they send all that water in to a cistern. When brewing it’s very important to know you base water very well in order to ensure that your beer turns out as you’ve designed it. Rain water changes with each season and each waterfront, additionally it’s very likely that contaminants get in to the rainwater as it passes from the atmosphere to the roof, though the gutters, in to cistern, and through the pumps and pipes on it’s way to the tap. On the positive side, mother nature doesn’t add chlorine or fluoride to the rain water either. Knowing this we can take a few steps when brewing with this water!