Shankar says the groundwater level can be maintained if such units located near lakes and rivers without licences are closed. R Kathiravan, Designated Officer, FSSAI, Chennai, says that there are 17 packaged water manufacturing units in the city alone. “We regularly monitor them and if we find the water to be unfit for consumption, we immediately ask the manufacturers to stop processing. After tapping the water, the manufacturers should do the purification process promptly. Some companies would not maintain the equipment properly and in such a scenario there is a possibility for water contamination. So, the manufacturers should be careful during the entire process of purification,” he says.