3 litres of water per day.
According to the Water Encyclopedia, that’s how much the average human needs per day for survival. This amount increases with physical activity and with temperature. Aside from replacing our body’s water we need water for a number of purposes including agriculture, cooking sanitation and hygiene. This amounts to 50 liters required to meet human needs.
Treatment and delivery of water costs a lot of money. The water needs to be pumped from a source like a lake, river or well to a water treatment plant. Depending on requirements the water can be treated in different ways.
Commonly it is filtered and then disinfected with a chemical such as chlorine. However, the equipment to do this costs thousands of dollars. Plants also need a building to be situated in, sensors to monitor the process, and an operator to run and maintain the system.
Costs for this are often Read more…














