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  1. Something that pollutes, especially a waste material that contaminates air, soil, or water.
  2. Any substance of such character and in such quantities that when it reaches a body of water, soil, or air, it is degrading in effect so as to impair their usefulness or render them offensive.
  3. Any solute or cause of change in physical properties that renders water unfit for a given use.

Go to Process Safety Glossary

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