Aquifer storage and recovery (ASR) is a practice used for the management of water supplies. In the United States, there are more than 50 sites in at least 26 states that have either utilized or investigated the concept of ASR. As of 2001, there were operational facilities in 15 states and pilot systems in another 5 states. Feasibility studies for ASR projects have been, or are being, conducted in another 6 states. As water supplies have become limited in more areas of the country, interest in ASR has expanded. However, regulatory concerns about water rights, degradation of groundwater quality, and storage and treatment of drinking water supplies have limited its use or have slowed the development of some ASR facilities. The purpose of the study was to accumulate information on the current regulatory practices affecting ASR in the various states, including a review of current active projects. The authors conducted a telephone survey of state water quality and water resources agencies in every one of the 20 states with an operational or pilot ASR facility. The authors conducted a written survey of ASR facilities throughout the United States, and received responses from 46 of the 51 facilities identified and surveyed. This paper presents a brief analysis of the similarities and differences among state regulatory approaches to ASR projects, as determined by survey results. Complete survey results and analysis, including profiles of each facility and of each state's regulatory approach, will be posted on the American Water Works Association (AWWA) web site, at a site maintained by the AWWA Groundwater Committee. Includes 6 references, tables, figures.