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Community river cleanup programs have expanded rapidly over the past decade, drawing volunteers who spend a single Saturday morning removing plastic bottles, tyres, and household waste from urban waterways. Organizers report that the visible results boost morale, since a clogged channel can look dramatically clearer within hours. However, environmental scientists caution that surface litter removal does little to address dissolved pollutants such as agricultural runoff or industrial effluent, which remain invisible but often more damaging to aquatic life. Some cleanup groups have begun partnering with local laboratories to test water samples before and after events, adding a scientific dimension to what was once a purely cosmetic exercise. This pairing of hands-on labour with data collection is increasingly seen as a model other environmental volunteering efforts might adopt.