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2.2 billion liters vs 1.8 billion liters – that’s Chennai’s water demand-supply equation


Read an interesting article in Hindu Business Line by S Sundaramoorthy, a desalination expert titled “Toilet to Tap” ( https://bit.ly/2XMtJ5u ).

The writer had discussed how treating sewage water and getting it back to circulation is an idea that is both practical and has the potential to solve Chennai’s water woes.

It is a brief but well articulated analysis – do read it if you are interested in the water situation in Chennai.

From a stat point of view, what grabbed my attention were the demand – supply equation (dataholism is what happens if you had been in market research too long!):

To sum up his data points:

(data points in million liters per day)

  • Total water availability in Chennai: 1789 (from reservoirs, Krishna water, ground water & desalination)
  • Total water requirement:                    2249 (from all sectors together for Chennai and surrounding municipalities)
  • Total deficit: 460 (about 20% of demand)
  • Total amount of water treated daily at sewage treatment plants: 550

Interesting. If all sewage water were treated and gotten back into circulation, the deficit vanishes.

That, indeed was the point of the article.


Categories: Chennai, Water

Author - Narasimhan Santhanam


Thank you for reading this post – hope it was helpful. You can connect with me at narsi@eai.in. My detailed profile here and my LinkedIn profile here

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