One of reports I have read says that some water basin of a country will be depleted by around 2020 if people use water by the same speed of its usage. This can be a biggest blow to the country.
Well, then, what do you do?
Good planning, good management of water resources, or budget increase in the sector, or education of local people to use wisely, or infra refinement against water leaking?
Or desalination, or import water?
This is not a challenge for the country alone, but a challenge to you, sooner or later.