Member States shall collect and maintain information on the type and magnitude of significant anthropogenic pressures to which the water bodies in each river basin district are liable. River basin management plans (RBMPs) containing concrete measures to be implemented have to be established with public participation and regularly reviewed (every six years) to take into account recent information. Within transboundary river basins, requirements for environmental objectives as well as programmes of measures should be coordinated for the basin as a whole.