This book illustrates the use of 2-D resistivity survey in determining the potential aquifer. 2-D resistivity is one of the efficient method which are non-destructive, rapid and cost-effective in finding groundwater or aquifer. Thus, this book is written to share the knowledge of 2-D resistivity survey in characterizing an aquifer. Seven different locations were compile with borehole records and geological evidence to validate the 2-D resistivity results. Besides that, the porosity calculation using the equation from Archie's law was used to support the interpretation from 2-D resistivity results to capture the reader's interest and understanding. The authors foresee that this book has the potential to better expand the knowledge on 2-D resistivity and share the experiences with those from the same field or to others in various fields such as engineering, environmental studies, geology and hydrology.