Industries are a major source of water pollution. Many industries discharge untreated or inadequately treated effluents directly into rivers and streams. These effluents often contain a dangerous mix of chemicals, heavy metals like lead and mercury, detergents, and organic waste. The textile, chemical, and leather industries are particularly known for releasing toxic dyes and chemicals. Furthermore, thermal power plants release large quantities of hot water, which reduces the oxygen levels in water bodies, harming aquatic life. This industrial pollution not only makes the water unfit for human consumption but also destroys entire aquatic ecosystems.