Nonpoint source pollution refers to the type of environmental contamination which originates from diffuse and varied sources. This ecological phenomenon has a wide variety of synonyms, including diffuse source pollution, nonpoint source runoff, nonpoint pollution, as well as Atmospheric deposition. The term is often contrasted with point-source pollution, which originates from discrete, identifiable sources like industrial sewage treatment facilities. Other synonyms for nonpoint source pollution include agricultural pollution, urban runoff, surface runoff pollution, and even natural sources of pollution, such as volcanoes or wildfires. These synonyms are commonly used in environmental research, sustainability policy, and regulatory practices to regulate, monitor, and mitigate the nonpoint source pollution.