Heavy metal emissions in Slovenia significantly decreased between 1990 and 2023. This can be largely attributed to the implementation of the EU legislation, improved surveillance and use of the best available technologies.

In the last decades, emissions of air pollutants from transport decreased. However, road transport remains one of the most significant sources of air pollution. In Slovenia in 2023 road transport contributed 40 % to the total emissions of nitrogen oxides. In the period 1990-2023 emissions of substances that cause acidification and emissions of ozone precursors in transport sector declined by 71 % and 76 %. In the period 2000-2023 emissions of particulate matter decreased by 51 %.

In Slovenia, slightly more than 106,000 tonnes of municipal waste were landfilled at 10 non-hazardous waste landfills in 2023, compared to slightly more than 90,000 tonnes the year before. The increase in landfilled municipal waste in 2023 was the result of the extensive floods that hit Slovenia during the summer of that year.

The share of landfilled municipal waste at the EU level in 2023 was 22% of generated municipal waste. The countries in which more than half of generated municipal waste was landfilled include Greece, Romania, Malta, Cyprus, Portugal, Hungary, and Bulgaria.

In Slovenia, just over 1.1 million tonnes of municipal waste were generated in 2023, which is 7 % more than the previous year, of which 69 % was collected separately. 26 % of municipal waste generated was packaging waste. In 2023, more than 294.000 tonnes of packaging waste were generated in Slovenia, of which more than one fifth was plastic packaging waste.

The share of waste electrical and electronic equipment (WEEE) disposed of within mixed municipal waste annually in the period 2020-2023 represented an average of 0.8% of collected mixed municipal waste. The share of waste batteries and accumulators (WBAs) was even lower, representing an average of 0.03% of all collected mixed municipal waste in the same period annually. The amount of separately collected WEEE has been increasing over the years. In Slovenia, just over 16,600 tonnes of WEEE were collected separately in 2023, which is almost 8% more than in 2022.