Here are 3 essays and paragraphs about water pollution. Fertilizers and pesticides applied in fields and crops are washed away by rainwater and mixed with river, canal and pond water, causing water pollution. Water pollution is also caused by the construction of unhealthy open latrines on the banks of water bodies, and the dumping of industrial wastes into rivers and canals. Water pollution poses a risk to human health and destroys the environment. Many of the causes of water pollution are responsible for air pollution too. In order to keep the earth habitable, we must stop all pollution that destroys the features of nature.