Quiz: What is the primary reason for the decline in water quality December 24, 2024 by Lake Core Editors Desk What is the primary reason for the decline in water quality in many of Michigan’s lakes? Discover more about Michigan Lakes at our Michigan Lake Category. A) Nutrient runoff from agricultural activities B) Increased recreational boating C) Natural sedimentation processes D) Excessive rainfall and flooding Submit Answer See also Quiz: Which of the following lakes is the largest inland lake in M