pollutant

pollute +‎ -ant

• IPA^(key): /pəˈl(j)uːtənt/

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pollutant (plural pollutants)

1. A foreign substance that makes something dirty, or impure, especially waste from human activities.
   • 1987 January 20, “Airborne Pollutants”, in The New York Times‎, ISSN 0362-4331:

     Acid rain forms when water in the atmosphere condenses on particles containing acid-forming pollutants, such as sulfate produced by the burning of fossil fuels and nitrogen oxides from automobile exhausts.

• micropollutant
• persistent organic pollutant

• pollutant on Wikipedia.Wikipedia