Regular tap water from your home contains chlorine. Lots of it. Chlorinated water not only kills the beneficial bacteria in your gut, but it also contains carcinogens (cancer causers) called trihalomethanes. Trihalomethanes accumulate in the tissues of your body and cause cell mutation (unusual changes) and can damage immune function. According to the U.S. council of Environmental quality, “Cancer risk among people drinking chlorinated water is 93% higher than those whose water does not contain chlorine. If your suffering from ulcerative Colitis, a good way to avoid flair-ups is to use a water filter. Using a filter helps remove toxins from your water. Regular gargling, spitting and hydrating removes irregular bacteria form the throat and mouth, which can protect your colon from digesting unhealthy bacteria.