ENRTF ID: 032-A Project Title: Critical Insights from Historical Lake Water Quality Data Category: A. Foundational Natural Resource Data and Information Summary: Derive ~40-year water quality database for >10,000 Minnesota lakes and analyze with in-lake, watershed, and economic factors to evaluate benefits to users and managers of improving or maintaining lake quality. Total Project Budget: $ 480,000 Proposed Project Time Period for the Funding Requested: June 30, 2023 (3 yrs) Name: Jeffrey Peterson Sponsoring Organization: U of MN - Water Resources Center Job Title: Director Department: Address: 1985 Buford Ave, 173 McNeal Hall St. Paul MN 55108 Telephone Number: (612) 624-9292 Email jmpeter@umn.edu Location: Statewide Alternate Text for Visual: Geospatial, temporal and economic analysis of ~40-year satellite derived lake water quality database will inform data-driven management and provide “how, what, why” answers and benefits/costs of water quality changes.