Sustainable development is indeed a complex phenomena, thus making the comparison and valuation of advances of EU-member states in the implementation of its objectives specifically difficult. The authors attempted to establish a synthetic measure of the level of sustainable development taking into account simultaneously three components: economic, social and environmental. It was aimed to compare particular countries by the mentioned measure and then grouping them. Relying on basis of content aspects the basics of research were "headline indicators" of sustainable development, sourced from the 2005-2012 research period formed the premise of the study. The study results demonstrate ongoing gradual advances being made in the implementation of concepts of sustainable development in EU-member states. Although there can be visible a gradual convergence of EU-member states in respect of their levels of sustainable development, nonetheless majority of countries still post indicators of sustainable development below the EU average, especially those which recently became members of the European Union.However, in respect of indicator X7share of renewable energy in gross final energy consumption -EU countries were strongly differentiated in 2005, with the coefficient of variation almost reaching 90%. Leading countries in this case were Sweden (40.5%), Latvia (32.3%) and Finland (28.9%). The mean indicator level for the countries studied was 11.6%. The share of renewable energy in gross final energy consumption in most EU countries was below the mean (right-handed asymmetry).Sweden, Latvia and Finland, in 2012, maintained their leadership position in the use of renewable energy sources. The lowest level of the X7 indicator was observed in Malta, Luxembourg and the UK, similar to the 2005 figures. The mean level of the indicator was 16.9% for the countries covered, while the EU countries continue to be strongly differentiated, with a coefficient of variation of about 70%.The lowest value of the X8 indicatorprimary energy consumptionfor 2005 was obtained in Malta, Cyprus and Latvia, while the highest was in Germany, France and the UK. EU countries were very strongly differentiated in terms of the values of the indicator, with a coefficient of differentiation of about 135%.The 2012 mean level for the primary energy consumption indicator for EU countries declined when compared with 2005, although neither the leading nor the bottom countries in the rating changed their positions as far as the X8 factor is concerned. The next headline indicator of sustainability in EU countries is X9energy consumption of transport relative to GDP (2000 = 100). Low levels of this indicator in 2005, when compared with 2000, were obtained in 16 EU countries. The leaders in this regard are Malta, Germany and the UK. The countries of Slovakia, Luxembourg and Austria occupied bottom positions in the national rating. When compared with 2000, low levels of indicator X9 were, in 2012, obtained in 21 EU countries. Greece, Ireland and Malta came out leaders ...