To keep track of the information about groundwater age is significantly important to comprehend the water resources and groundwater flow. It can also contribute to evaluate the safety and vulnerability of drinking water. The use of radioisotope and (or) dissolved gas tracers is highly advantageous because they can provide the direct information of each sample as to the groundwater age.

Chikyu Kagaku Kenkyusho has extensive knowlede and expererience regarding the whole procedures of ground water dating : collecting samples, the choice of tracers, analysis, calculation of age and interpretation.