Oh my god James, you drank the water in Baltimore? Probably ate bay crabs as well, tsk tsk.
Coesey -
Drink bottled water lots of it, 3 times as much as you do at home. Buy some at a store, it will be cheaper than the
PR if they do not provide it. There is a little tienda two blocks (10th ave) away from the beach, turn right mid block from your hotel. Brush your teeth with bottled, everything else will be fine.
now remember this formula:
I drink (booze, wine or beer)
1 bottle of water
and you will be fine.