Water pollution is the contamination of water bodies, such as lakes, rivers, oceans, and groundwater, usually caused by human activities. Pollutants include chemicals, trash, bacteria, and parasites. This pollution affects aquatic ecosystems, making water unsafe for drinking, recreation, and agriculture. Sources of water pollution can be categorized as point sources (e.g., industrial discharge) and non-point sources (e.g., agricultural runoff). Addressing water pollution requires comprehensive strategies involving regulations, improved waste management, and public awareness to protect water resources and human health.