Quality Assurance of Water Level Records from Wells in the Mississippi River Valley Alluvial Aquifer in Missouri from the Missouri Department of Natural Resource's Well Information Management System (WIMS)

The Missouri Department of Natural Resources' (MoDNR) Well Information Management System (WIMS) is a repository for recent (1983-present) well information that includes date of completion, well construction, geology, and water level. Well information is provided by the well drillers during the permitting process and is updated regularly by MoDNR. This data set consists of well records that were drilled into or through the Mississippi River Valley alluvial aquifer in an approximately 7 county area in southeastern Missouri as reported by the well drillers. Records that met specific threshold criteria were identified and statistical analysis done to ensure that the well was open to the Mississippi River Valley Alluvial aquifer (Asquith and others, 2020). Records that did not meet the specific criteria were identified and noted in the MoDNR WIMS dataset. Water levels from wells meeting all criteria were placed into a final dataset to be used in groundwater modeling efforts for the Mississippi River Valley alluvial aquifer. Each original record can be found in the WIMS data base by searching for the well reference number. The MoDNR site can be accessed at the following URL: https://www.dnr.mo.gov/mowells/.