Environmental geophysics is often limited to surveying and “anomaly-picking” or performed as an add-on to other environmental investigation techniques. There is usually little scope for detailed quantitative interpretation or meaningful combination with other environmental investigation results. In this study, we have combined ground and airborne radiometric data with related geochemical, geographic, hydrologic and radiation protection results from the Wonderfonteinspruit catchment of the West Rand. An improved understanding of the environmental contamination processes in the vicinity of gold/uranium mining and processing operations has been obtained. Information of this type can form the basis for hazard and risk assessment studies.