The amount of waste from coal combustion is decreasing as a result of the reduction in the use of coal for electricity generation. In 2022, the amount was 15% lower than the previous year. By far the largest source is the Šoštanj thermal power plant. Most of the waste is used as fill material in mines.

Over the period 1990-2022, the amount of spent nuclear fuel, the only high-level radioactive waste, increased at an average rate of 5% per year. In the absence of a satisfactory permanent storage solution, there are concerns about the accumulation of this waste.

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.