Good Environmental Status is a qualitative description of the state of the seas that the European Union's Marine Strategy Framework Directive requires its Member States to achieve or maintain by the year 2020. Good Environmental Status is described by 11 Descriptors: Good Environmental Status is a qualitative description of the state of the seas that the European Union's Marine Strategy Framework Directive requires its Member States to achieve or maintain by the year 2020. Good Environmental Status is described by 11 Descriptors: