Monitoring and classification
SEPA has introduced new water monitoring and classification systems that will provide the data to support the aim of the Water Framework Directive (WFD): that all water bodies are of good ecological status, or similar objective, by 2015.
SEPA has many years' experience in monitoring and protecting the aquatic environment. The WFD introduces a holistic approach to monitoring for a range of different pressures. The new monitoring network will enable us to identify further problems and resolve them, thereby improving the water environment.
The new classification system covers all rivers, lochs, transitional, coastal and groundwater bodies, and is based on a new ecological classification system with five quality classes. It has been devised following EU and UK guidance and is underpinned by a range of biological quality elements, supported by measurements of chemistry, hydrology (changes to levels and flows) and morphology (changes to the shape and function of water bodies). Some of the quality elements used in the new ecological classification system have not been monitored in Scotland before.
The classification scheme has been agreed across the UK, and gives us the best picture we have ever had of the quality of Scotland's aquatic environment.
SEPA produces an annual water classification.
EU and UK work
SEPA has made a significant contribution to the EU and UK working groups directing the work on monitoring and classification. This work is taken forward through European CIS guidance and the UK Technical Advisory Group (UKTAG).
Long term water quality indicator
SEPA publishes a long-term water quality indicator, based on a consistent set of five water quality parameters which are sensitive to organic pollution, nutrients and toxic substances, and which provide a measure of species diversity. This indicator is published in Key Scottish Environment Statistics 2011 
on the Scottish Government website.