Pure water

The city's second desalination plant, and the country's largest, has been operational since February this year. When running to full capacity, this reverse-osmosis based plant at Nemmeli, on the way to Mamallapuram, will supply 100 million litres of treated water every day. To enable that, it takes in a little over 250 million litres of seawater every day from the Bay of Bengal. 

But wait. Doesn't the desalination plant at Minjur also put out 100 MLD of treated water? So how is this the country's largest? Well, the only explanation is that the position is jointly held by these two plants which together provide roughly one-sixth of the city's current fresh water requirements!