In Slovenia, emissions of persistent organic pollutants (polychlorinated biphenyl, polycyclic aromatic hydrocarbons, hexachlorobenzene, dioxins and furans) decreased between 1990-2023, primarily due to targeted legislation, improved control and use of best available technologies.

In 2023, agriculture accounted for 97.4% of total ammonia emissions. From 1990 to 2024, ammonia emissions in Slovenian agriculture decreased by 31.0% and by 15.7% since 2005. Slovenian agriculture is achieving the overall emissions target set out in the NEC Directive (a gradual reduction of at least 15% by 2030 compared to 2005).

Emissions of primary particles smaller than 10 µm (PM10), particles smaller than 2.5 µm (PM2.5), and all total suspended particles (TSP) decreased in Slovenia in the period 2000–2023 by 26 %, 36 %, and 11 %, respectively. The main source of particulate matter emissions are households, mainly due to the use of biomass for domestic heating.

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 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.