Water pollution, both rivers, seas, lakes and underground water, is increasingly becoming a problem in Indonesia, as is air pollution and soil pollution. Getting clean water that is not polluted is not easy anymore. Even in the rivers on the slopes of the mountains though.

Water pollution in Indonesia is mostly caused by human activities that leave residential waste, agricultural waste, and industrial waste including mining. Residential waste has the meaning of all pollutants produced by residential areas or households. Residential waste can be in the form of organic waste (wood, leaves, etc.), and non-organic waste (plastic, metal, and detergent).

Agricultural waste has the meaning of all pollutants produced by agricultural activities such as the use of pesticides and fertilizers. Meanwhile, industrial waste has the meaning of all pollutants produced by industrial activities which often produce hazardous and toxic materials (B3).

Another impact that is no less detrimental than water pollution is the disruption of the environment, ecosystems, and biodiversity. Polluted water can kill various organisms that live in the water.