India, June 2 -- Drinking water in Delhi doesn't taste as refreshing as it should. In fact, there are many areas in the city where groundwater is notoriously harsh and salty in taste. If the water that you get as a part of the water supply in your home has a salty aftertaste, leaves white stains on utensils and causes scaling in home appliances, you are most likely battling high TDS (Total Dissolved Solids). In many neighbourhoods in Delhi, TDS levels easily cross the recommended 500 ppm limit. This is particularly true in the areas that depend on borewell water, groundwater, tanker supply, or a mix of multiple sources for their water supply. All of this makes the water taste unpleasant and unsafe to drink. This is where a good duty RO (r...