Seamus,
Dem say the ice machines used double filtered pipe water. Apparently the locations that make ice are checked by health officials on a regular basis. I bought 4 bags at Texaco in Non Parell road.
Happy,
The only filter that will truly protect you from pipe water if it's bad, is a reverse osmosis system. That said, if no one is getting ill from the ice, please order up a couple of dirty bananas!