This is a user's manual for effectively evaluating water issues associated with enhanced oil recovery (EOR) production. It is designed to provide ready reference and to assist EOR producers, energy planners, and decision-makers in assessing the impacts of water issues related to EOR production. An evaluation is made of EOR water requirements using public available information, data from actual field applications, and information provided by knowledgeable EOR technologists in 14 different major oil companies. Water quantity and quality requirements representing the total water needed from all sources (e.g., aquifers, lakes, etc.) are estimated for individual EOR processes in those states and specific geological locations where these processes will likely play major roles in future petroleum production by the year 2000. A reduction in these quantities can be achieved by reinjecting some or all of the produced water potentially available for recycle (i.e., some is lost in oil and water separation treatment processes) in the recovery method. Data and information for quantity and quality of surface and ground water availability and competing entities by four major user categories are presented on a qualitative and quantitative basis on a state-county basis from monitoring sites nearest existing EOR projects. Information regarding regulatory bodies responsible for the control of water supply and use is presented in tabular form by state only because of the volume and complexity of material. While no major EOR project to date has ever been abandoned because of water supply problems, factors such as competing regional uses for water, drought situations, and scarcity of high quality surface and ground water could be impediments to certain projects in the near future. 6 figures, 22 tables.