For countries without their own environmental monitoring systems, the Environmental Performance Index (EPI) can be useful for working out where there is a need for action in environmental policy making, but otherwise there are already better ways of getting results, says the conclusions of a study conducted by the Helmholtz Centre for Environmental Research (UFZ).
According to the study authors, Germany, for example, already has more accurate and appropriate instruments than the 2008 EPI – such as the European Environment Agency´s State of the Environment Report and the Federal Environmental Agency´s Umweltbarometer.
One difficulty is the legitimacy of the targets set for each indicator. The EPI employs a distance-to-target method which requires explicit target values, against which the countries are measured. According to the EPI 2008 report, only 5 out of 25 target values have been set in international agreements or guidelines, all others represent expert judgement taken from scientific literature. Augustin Berghöfer, one of the analysts at the UFZ says, "the EPI lacks crucial legitimacy as an instrument for benchmarking. Why should governments measure themselves against target values which they may not even have heard of so far?"