A few years ago and friend and I had a 10 hour layover in Seoul. It was novembr and we were returning from a trip to Bangkok. Our final destination was Honolulu. I did not bring a jacket and damned near froze to death.

We stopped off at a small noodle shop and drank the water that was on the table in a large jug. My friend barely made it back to Honolulu. He as sick for over two weeks. I got sick a day later but it was pretty bad for week. My advise is to not drink the water. Aloha