A very small amount of Sodium Hypochlorite is added to the water at the District’s wells and the surface water treatment plants disinfect it. The chlorine kills bacteria and viruses that could otherwise make you sick. We measure the chlorine residual at various locations throughout our water distribution system daily to ensure your safety. We also do microbiological tests every week to make sure there are no coliform bacteria. If these indicator organisms are found, there could also be other bacteria in the water that can make you sick. We protect our water against those bacteria and viruses by having a small amount of chlorine in it.