Measured environmental concentration

A measured environmental concentration is the amount of a chemical substance found in an environmental sample. The concentration of the compound may result from direct contamination, the transformation or metabolization of a different chemical contaminant, natural origin, or a combination of these sources.
MEC is to be used as a reference in the context of Chemical Safety Assessments and should be compared with the respective Predicted [Environmental Concentration] and Predicted No-Effect Concentration in order to decide whether exposure model is valid and the compound related risk is controlled.
The formula:
Risk =
is used to calculate risk information.