Geophysical data offers a spatially extensive complement to traditional borehole sampling and can be used to improve groundwater investigations. We provide site specific advice for the application of geophysical methods, geophysical data processing and integrated interpretations. Geophysical interpretations can be directly used in groundwater system conceptualization and guide numerical model construction. We can work with external geophysical contractors to organize field data collection, and review publicly available regional geophysical data for existing resources.