Transboundary Aquifers, a global outline

This document outlines the situation of the transboundary aquifers in the world.

The vast majority of countries (excluding island states) are so-called ‘aquifer states’, sharing a precious natural resource: groundwater. Aquifer states need to have a good knowledge of these shared resources because changes in groundwater quality and quantity can have an effect across the border which can lead to international problems.