The locations of 1,940 selected wells in 72 counties, which comprised the Kansas groundwater observation-well network 1983, are listed. Water level measurements are made in these wells on a continuous, monthly, quarterly, or annual basis. Data collected from the observation well network are stored in a computer and have been published in various formats. The observation well network provides a continuing program of collection, analysis, and storage of groundwater level data required to define and describe the groundwater resources of Kansas. Accurate groundwater information is the single most important item for management of the State 's groundwater resource and is required for the application of research to the solution of groundwater related problems. The information provided by the observation well network is needed at all management levels to aid in the evaluation and conservation of groundwater. (Lantz-PTT)