I was just doing an internet search on this same topic, because I am also getting sick when I drink water. Right now, my stomach is cramping, burning, I feel nauseous & have diarrhea. All this started first thing this morning when I started drinking a different brand of bottled water. It seems to happen with well water, city water & bottled water, some more than others. I had a colonoscopy & they found inflammation in my colon. I also have IBS & diverticulitis. I don't know if the inflammation is caused by the water, or the inflammation causes me to not be able to tolerate the water. I also have a scratchy, red throat most of the time which another reader mentioned. I used to drink vinegar & honey water (1/2 c. each of apple cider vinegar & water, to a gallon of water). That was the only way water didn't upset my stomach. I think I'm going to have to start drinking that again because I get too dehydrated with the present water situation.