- Something that pollutes, especially a waste material that contaminates air, soil, or water.
- 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.
- Any solute or cause of change in physical properties that renders water unfit for a given use.
Important Notice: Limited Web Access Dec 16 to 18, 2016
AIChE will undertake a routine upgrade of our digital infrastructure over the weekend of December 16-18, 2016. During this period access to certain areas of the website will be limited. Additional information will be forthcoming shortly.