The diagrams are based on only water bodies with classified ecological status or potential.
- The percentage high and good status (blue or green colour) or water bodies without pressures or impacts (blue colour) are always presented to the right of the bar charts.
- Diagrams with country comparison are always ranked by the percentage of water bodies not achieving good status (red, orange and yellow colour).
- This ranking by percentage of water bodies not achieving good status are kept when presenting percentage of water bodies affected by different pressures or impacts.
- Pressure information has been aggregated to main pressure groups (see the notes to the diagrams).