While regulating the use of RO system in the country, based on the TDS parameter, the concerned Local Bodies like Public Health Engineering Department (PHED), Jal Nigam, Municipal Corporation, Jal Board, Municipalities, Private and Public sector agencies engaged in potable water supply, shall inform the consumers about the water sources and quality including total dissolved solids (TDS) concentration of water being supplied through billing instruments and also through public advertisement in newspaper and other mass media means on regular basis.

[2]

The statement came in the wake of the question on whether the National Green Tribunal had directed the Ministry of Environment to issue notification restricting the use of reverse osmosis water purifiers in places where tds in water was below 500 mg per litre.