This document reports on a research study funded by Electric Power Research Institute (EPRI), the Great Lakes Protection Fund (GLPF), the National Council for Air and Stream Improvement (NCASI), and the Council of Great Lakes Industries (CGLI). The objective of the research was to understand and compare, with the assistance of case study applications, water resource stewardship assessment tools that have been proposed by different organizations. The report concludes that tools used to assess global water use practices have the potential to improve industry's understanding of water use. After reviewing 19 tools, the project team further concluded that no single existing tool can comprehensively demonstrate that a particular water use is sustainable. The team also concluded that the tools need to be enhanced or modified to meet the unique needs of the electric power sector.