This document discusses water pollution and its various types. It introduces water pollution as the contamination of water bodies that occurs directly or indirectly when pollutants are discharged without adequate treatment. The types of water pollution discussed include surface water, ground water, microbiological, oxygen depletion, nutrient, suspended matter, and chemical pollution. The document also outlines causes of water pollution like sewage, industrial waste, and agricultural runoff, and effects like harm to wildlife and ecosystems as well as human health impacts. Ways to prevent water pollution mentioned are proper waste disposal, reducing plastic use, conserving water, and choosing environmentally-friendly products.