The Indian Public Health Association’s Tamil Nadu Branch is pursuing water surveillance in the interest of the public. The response comes after it was discovered that close to 300 mineral water RO plants are functioning in the state without licence. This is done to remove the misconception from the public conscience that bottled water is safe water. Food safety officers will also keep a close look out for unauthorised units that do not have a registered RO system or an ISI certification. Care will be taken to see the manner in which the bottles are washed in the plants.