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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Environ Int. 2013 Jul 9;59:10.1016/j.envint.2013.06.003. doi: 10.1016/j.envint.2013.06.003

Table 1.

Interaction of pollutants.

(EPA, 2000)
Additivity: Effect of the combination equals the sum of individual effects
Synergism: Effect of the combination is greater than the sum of individual effects
Antagonism: Effect of the combination is less than the sum of individual effects
Inhibition: A component having no effect reduces the effect of another component
Potentiation: A component having on effect increases the effect of another component
Masking: Two components have opposite, canceling effects such that no effect is observed from the combination