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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The quality of water required to support life and growth of marine bivalves and gastropods in the period 2003–2009 was in compliance with statutory requirements.


Air pollution is the greatest environmental risk to health and a major cause of disease and premature deaths in Europe. Pollution due to PM2.5 causes respiratory, cardiovascular, neurological and metabolic diseases. Since 2005, the number of premature deaths due to PM2.5 pollution has been decreasing in Slovenia and in EU countries. In 2019, there were 1,409 premature deaths due to PM2.5 pollution in Slovenia, and 307,000 in the European Union.


In the last decades, major emissions of air pollutants from transport decreased. However, road transport remains one of the most significant sources of air pollution. In Slovenia in 2020 road transport contributed 38 % to the total emissions of nitrogen oxides. In the period 1990-2020 emissions of substances that cause acidification and emissions of ozone precursors in transport sector declined by 74 % and 77 %. In the period 2000-2020 emissions of particulate matter decreased by 56 %.


In Slovenia, in 2021, drinking water monitoring (quality monitoring) was carried out for 94,6% of the population, at the point of use (user's tap) on drinking water supply systems, or in 873 supply zones that supplied 50 or more inhabitants and included 23 smaller supply areas, which also supplied public facilities, facilities for the production and distribution of foodstuffs. In the drinking water monitoring did not include 5,4% of the population of Slovenia, which supplies fewer than 50 persons e.g. individual supply providing, rainwater.


In 2021, drinking water monitoring was carried out in supply zones (water supply systems) that supply 50 or more persons (94,6% of the population). Large, medium and some of small supply zones that supply more than 500 (90,0%) inhabitants, generally have adequate drinking water quality. The smallest supply zones that supply 50-500 inhabitants are the least regulated, in comparison to larger due to the fecal contamination, as some with karst water resources.


Frequency of groundwater drought is increasing in recent decades in alluvial aquifers. 8 out of 10 years with highest intensity of groundwater drought in period 1981-2022 occurred after year 2000. Groundwater droughts with higher intensity is characteristic for winter while milder groundwater droughts mostly occur at the end of the summer and at the beginning of autumn. Groundwater drought intensity is also increasing seasonally with time between June and September when groundwater use is pronounced.