Environmental indicators in Slovenia

Environmental indicators are based on graphs, maps and assessments and as such present environmental trends in Slovenia. The indicators represent one of the four pillars of our environmental reporting, and are prepared in accordance with the Environmental Protection Act. The Environmental Indicators in Slovenia website enables users to browse among 180 indicators. They are based on numerical data and they indicate the state, characteristics and trends of environmental development in Slovenia. They are prepared using a systematic approach based on data and monitoring, as shown in the information pyramid.

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In Slovenia, total emissions of the pollutants that contribute to acidification and eutrophication have decreased by 78 % between 1990 and 2018. Emissions of SOx have decreased by 98 %, NOx by 53 % and NH3 by 19 %. The emissions of sulphur oxides, nitrogen oxides and ammonia were in 2018 below the prescribed target values.


For the period 2002–2005, an improvement in the chemical and saprobiological quality of rivers was observed.

Due to changes in legislation, this indicator was replaced in 2006 by the indicator [VD12] Chemical and ecological status of surface Waters.


Slovenia has some of the greatest subterranean biodiversity in the world. The aquatic fauna, with its 200 species, is by far the richest, while the terrestrial fauna, with 150 species, is second only to the more southern areas of the Dinaric karst. Five Slovenian cave systems have been listed among the 20 richest cave systems in the world. The Postojna-Planina Cave System, with its 50 aquatic and 35 terrestrial species is by far the most abundant. The Cave Protection Act protects the subterranean environment as a whole.


The assessment of external costs of transport in Slovenia for 2002 varies between 6 and 9.8 % of GDP, which is at the level of the EU-15 average (7 %). The majority (over 90 %) of all external costs of transport in Slovenia are caused by road transport.