The IPPC Directive has recently been codified (Directive 2008/1/EC). The codified act includes all previous amendments to Directive 96/61/EC, the substance of which is unchanged. The Urban Waste Water Directive requires secondary treatment for loads in excess of 2 000 population-equivalent (p.e.). For instance, biological water quality is currently assessed in terms of macro invertebrates only. The new classification will take account of phytoplankton, aquatic flora, invertebrates and fish.