A Groundwater Strategy for Michigan: Protecting the “Sixth Great Lake” assesses Michigan’s current groundwater management landscape, identifies areas for improvement, and proposes recommendations for the state legislature, regulatory agencies, and advocacy organizations to advance groundwater protection. To achieve these objectives, researchers conducted a comprehensive review of existing data on Michigan’s groundwater resources and management scheme, policy analysis of Michigan and comparative states, and qualitative interviews with local officials, residents, and experts, focused on 3 case study counties.