Measures of pollutant concentration

Measures of pollutant concentration are used to determine risk assessment in public health.

Industry is continually synthesizing new chemicals, the regulation of which requires evaluation of the potential danger for human health and the environment. Risk assessment is nowadays considered essential for making these decisions on a scientifically sound basis.

Measures or defined limits include:

• no-observed-adverse-effect level (NOAEL), also called no-effect concentration (NEC), no-observed-effect concentration (NOEC) or similarly
• lowest-observed-adverse-effect level (LOAEL)
• acceptable operator exposure level (AOEL)^[1]
• ECx (in percentage).