Assess students' ability to analyze how urban, agricultural, and forest land uses influence a local watershed's water quality by identifying key pollutants (nutrients, sediments, stormwater contaminants), interpreting simple monitoring data or scenarios, comparing impacts across land uses, and proposing practical mitigation strategies (e.g., riparian buffers, stormwater management, reduced fertilizer use). Scope: Grade 6–8, medium complexity, focus on causes, effects, and actionable local solutions.