The Economics of Water

I live in the city of Bangalore, in India. Bangalore was once known as a city of lakes, home to hundreds of reservoirs constructed to store water, sustain fish and support agriculture.

Today, the city faces an acute water shortage. About half of the city gets its drinking water through piped supply. The other half relies on groundwater, which has been depleted by unplanned and uncontrolled urbanization.

Bangalore is just one example of a developing global water crisis. Cities across the world are becoming increasingly thirsty as the demand for water grows and supply dwindles. Parts of Spain are experiencing the worst drought in recorded history. Water scarcity forced the U.S. to limit water releases in its western states. Unprecedented water shortages have afflicted Mexico City. Cape Town is planning for “day zero,” a point at which the city’s taps would run dry.

Two-thirds of the world's largest rivers are no longer free-flowing. Since 1970, the world has lost over one-third of its remaining wetlands. The Rio Grande/Rio Bravo, the water supply for over 6 million Americans and 10 million Mexicans, is drying up rapidly.

Climate change, along with growing populations and the transition to clean energy, will only intensify water stress. Morgan Stanley estimates global water demand will be 40% greater than supplies of fresh water by 2030. India is the most stretched, with about one-fifth of the global population but only 4% of the world’s fresh water. Saudi Arabia and South Africa are the major countries from the Group of 20 nations facing extreme water deficits. Cooler regions are not immune: London faces “serious shortages” by 2040, according to the Greater London Authority.