As part of the 2012 Update of the Oklahoma Comprehensive Water Plan (2012 OCWP Update), the Oklahoma Water Resources Board (OWRB) has prepared this Public Water Supply Planning Guide to assist public water supply systems in developing plans to meet their specific long-term water needs. While the guide may be most useful for smaller systems that have not prepared water supply plans in the past, the outlined steps and processes for planning are applicable to any size system.; The purpose of this guide is not to provide a single solution that fits every system, but to develop a framework for long-range water system planning. This framework includes collecting data, determining if there are gaps between the existing system and future needs, and developing and assessing strategies to close the gap.; This guide will help identify how public water systems can use the technical information provided by 13 OCWP Watershed Planning Region reports (OCWP Regional Reports) that were published in 2012. These reports present elements of OCWP technical studies pertinent to each of the states 82 surface water basins (aggregated into 13 planning regions). Each report contains information from both a regional and multiple basin perspective, including water supply/demand analysis results, forecasted supply shortages, potential supply solutions and alternatives, and supporting technical information