What is classification?

Classification systems are used to assess the state of the aquatic environment at a point in time. They show where the environment is of good quality and where it may require improvement. Classification systems therefore help in planning what measures might be required for improvements, and will help in the future to assess how our actions have benefited the environment.

Regulatory agencies in the UK already use classification systems such as the General Quality Assessment (GQA) scheme. The GQA has been a very useful tool for measuring the quality of our rivers and giving a snapshot of levels of pollution. This has proved useful in showing how river quality has improved over recent years as a result of investment. However, a more detailed picture of the water environment is now needed to support implementation of the Water Framework Directive (WFD).