This work aims to show the rules, fundamentals and essential features of the use of
stable and radiogenic isotopes in the identification and dating of groundwater, starting with
studies of stable isotopes from hydrogen and oxygen and effects that reaches them, studies of
water groundwater in local and regional level from alluded isotopes. This involves dating of
groundwater using tritium, since questions about its formation (natural and anthropogenic),
also stands out, its use to estimate flow velocities of water in the underground. The use of
elemental carbon in a study of groundwater is treated at work, both its direct relationship in
the composition of living and dating of groundwater (radiocarbon) with methods that seek
greater precision in the calculation of the period of groundwater. At the end of the work, other
topics are treated as the methodology for the study of these isotopes and case studies that
show the potential of isotopic tool. Finally, the study seeks to relate the isotope geochemistry
as a tool to assist water management setting important parameter for decision making by the
relevant authorities.
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