In 2023, Slovenia recorded a decrease in the number and total area of functionally derelict areas (FDAs): 1070 FDAs were registered with a total area of 3225.44 ha. This brings the situation closer to that of 2017, with a decrease of 62 in the number of FDAs and 469.83 ha in total area, compared to 2020.

In Slovenia, built-up areas continue to increase, representing 5.7% of the land use structure in 2023. In the period 2019-2023 built-up areas were predominantly spread to grasslands (42%), forest (18.6%) and the category other (16.1%), with the total built-up area increasing by 1,618.9 ha over this period. Existing data sources in Slovenia have recently made it possible to evaluate the actual loss of land to development.

Water consumption in Slovenia represents a relatively small proportion of the annual gross water outflow from the country. In 2019, the annual WEI+ index was around 3%, and same 3% compared to the periodic average of water availability. The Long-term Annual Average Water Exploitation Index shows a slight decrease, but the trend is not statistically significant.

In recent years, the amount of wastewater treated by secondary or tertiary treatment processes increased, while primary treatment processes have closed. The amount of wastewater treated through secondary treatment processes increased by 150 % since 2000 or from 30 million m3 (in 2000) to almoust 45 million m3 (in 2019). There were almost no tertiary wastewater treatment processes in Slovenia in 2000, and in 2019, 72% of wastewater or 113 million m3 of wastewater was treated by tertiary process.

In 2008, the trend of reducing annual quantities of deposited waste continued both in landfills that are part of public infrastructure as well in landfills operated by the industry. In 2008, 835.3 thousand tonnes of waste were deposited on landfills belonging to public infrastructure and 207.8 thousand tonnes were deposited on landfills operated by industry.

Since 2004, the share of collected waste oils in relation to the quantity of oils sold grew from 15% to 30% in 2007, which is the target figure. In recent years, the share of recovered or incinerated waste oils compared to deposited oils is also increasing, which shows that this waste is used as additional energy-generating product. According to 2004 data, 4145 tonnes of waste oils were recovered, and 134 tonnes deposited.

The collected quantities of health-care waste increased after the adoption of the regulation governing this waste. Collected quantities of waste medicines are also expected to increase, since collection in pharmacies was introduced at the end of 2009.

The majority of waste edible oil is exported to other EU Member States for recycling into biodiesel. According to the official records of the Environmental Agency of the Republic of Slovenia, there is no industrial biodiesel production from waste edible oils in Slovenia.

Collected quantities of organic kitchen waste more than doubled after the implementation of the regulation, but its management has so far failed to achieve the set objectives. Deficiencies are particularly evident in composting. About 3,000 tonnes of such waste were composted in 2007, but so far only one entity obtained the environmental permit required for this activity.