The field-measurement phase of the 2015 annual cooperative water-level measurement program was successfully completed by both the Kansas Geological Survey (KGS) and the Division of Water Resources (DWR), Kansas Department of Agriculture, prior to March 1, 2015. The annual program is designed to regionally sample the High Plains aquifer in Kansas so trends can be established and evaluated for effective incorporation into water-resource management strategies. Water levels were recorded in 96.6% of the 1,389 network wells in 2015. The KGS measured 556 wells and the three DWR offices (Garden City, Stafford, and Stockton) measured 833 wells. Responsibility for reading Ford County wells was assumed by KGS in 2015; the DWR office in Stafford had been responsible for reading these wells in 2014. Data acquisition by KGS staff was completed in January.