1. European Union, Directive 2000/60/EC establishing a framework for Community action in the field of water policy, Water Framework Directive, 2002.
2. European Union, Common Implementation Strategy (CIS) for the WFD, 2003.
3. IMPRESS, Guidelines for the analysis of pressures and impacts in accordance with the Water Framework Directive. CIS Working Group 2.1, Office for Official Publications of the European Communities, 2002, 156 pp.
4. Council Directive 91/271/EEC of 21 May 1991 concerning urban waste-water treatment.
5. Council Directive 96/61/EC of 24 September 1996 concerning integrated pollution prevention and control.