Welcome to Wellogic, the State of Michigan’s statewide groundwater database!  Wellogic is the Internet-based data entry program developed by the state of Michigan in 2000 to provide an easy method for water well drilling and pump installation contractors to submit water well records.  Water well records from January 2000 and later are being entered into Wellogic by contractors, local health departments, and the DEQ. Both water well and pump records and abandoned well plugging records are being entered into the database.