Bromates within the drinking water do pose a slight increased risk of cancer in something like 2 out of 10,000 people. With that said, there should be no bromates present in drinking water anywhere on St. Martin. Bromates can be removed from drinking water through a process called reverse osmosis -- a process that I use at home to filter water for my marine aquarium which I've maintained since 1995. I wouldn't suggest asking about this on the French side, but if a facility is using this process given the present status of the water then there would be nothing to worry about. But, I would still prefer bottled beer!