Metals Environmental Risk Assessment Guidance (MERAG)

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Metals are natural components of the earth and exist in many forms - each with its own specific chemical characteristics that define its interactions with the environment and with living organisms.


  1. Risk characterisation – general aspects.

  2. Exposure assessment.

  3. Effects assessment.

  4. Marine risk assessment.

  5. Bioavailability – water, sediment and soils.

  6. Bioavailability – water, sediment and soils (continued).

  7. Uncertainty analysis.

  8. Classification.

  9. Weight of evidence.

Overview document

Background document