Does your drinking water come from fresh rain that regularly falls near your city, or from an ancient groundwater reserve in a neighbouring country that’s nearing depletion?

Understanding the source and sustainability of our water is crucial to preventing sudden shortages and ensuring long-term access. With the right data, communities and decision-makers can take informed action. Isotope hydrology plays a key role in this process, enabling scientists to trace the origin of water and determine how long it has been circulating since it first fell as rain. This helps us map how water moves through the environment and assess how quickly essential groundwater reserves are being drained. These insights are vital for managing water resources sustainably and protecting them for future generations.

?