In 2007, my wife started throwing up multiple times a day. After about a year of this and doctors, we finally decided to remove tap water from her diet and only use spring water from the store. Instantly she stopped throwing up. I don't know what the issue was since she didn't have problems drinking it before then. I live in the Houston area and looking through water reports and doing some research online, Houston's municipal water districts discontinued using chlorine to disinfect water and switched to chloramine. This coincides with the start of my wife's vomiting. I don't know that this is the cause it might be. She drinks spring water from gallon jugs now. It's been almost 10 years since she's been drinking only spring water. She has recently been getting nauseous again. I don't know why. Perhaps the spring water now has chloramine in it. We're searching again.