Pollution Types and Definitions

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Non-point source

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Release of pollutants from numerous, widely dispersed origins.

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Point source

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Release of pollutants from a single, clearly identifiable site.

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Persistent pollutants

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Pollutants that don't break down under natural processes.

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Biodegradable pollutants

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Pollutants that can break down under natural processes.

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Primary pollutants

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Active upon emission, such as carbon dioxide and nitrate containing substances.

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Secondary pollutants

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Arise from primary pollutants undergoing some kind of physical or chemical change.

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Acute pollution

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Occurs during a pollution incident.

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Chronic pollution

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When pollution is persistent and perhaps recurrent.