Waterfall trek (and dysenteria??)

Yesterday, a Canadian chick and I hired an Aussie guide (I am in Cambodia, I promise) to take us to a waterfall near Kampot. It was a 2 hour, ridiculously hot trek up through banana, mango and papaya jungle, up the Elephant Mountains. A very rewarding swim in clear, cold water awaited us on the top. Our guide, Danny, then kindly re-filled our water bottles under our suspicious glare, but the water was better than what was in the bottle to start with.