The per capita demand or per capita consumption is usually calculated for a specific city, area, or village for planning the water requirement of that area and to plan a specific water distribution system accordingly. so coming back to your we generally calculate per capita demand for a specific city for example cities like Mumbai, Kolkata, Banglore, Nagpur, etc
so generally we cannot calculate the water demand for a whole country or nation. instead of that, we calculate the water demand for specific areas.
I’m listing down some percapita demand of some cities in India .Hope it will helpyou in understanding things.
- kolkata 116 lpcd
- hyderabad 96 lpcd
- ahemdabad 95 lpcd
- mumbai 90 lpcd
- madhurai 88 lpcd
- delhi 78 lpcd
- kanpur 77 lpcd
(note : per capita demand =current population*water demand/365*100)