In Sweden, about 700 plants are included in the European Union Emission Trading Scheme (ETS) for carbon dioxide (CO₂), which was launched on the 1st of January 2005. The Swedish Environmental Protection Agency (EPA) is responsible for collecting and reviewing the data.

For international reporting of emissions to the UNFCCC, EU Monitoring Mechanism, CLRTAP and the EU NEC Directive 1990-2004, activity data is mainly based on energy statistics from Statistics Sweden’s surveys. In some cases, additional data sources, such as companies’ environmental reports or direct information from the company, are used as a compliment. 

In this study, activity data, thermal values and CO₂ emission factors from the largest 63 plants in the ETS (which account for 75% of the CO₂ emissions from all plants within the ETS) in 2005 are compared with the energy statistics and analysed. Furthermore, this study presents different choices and recommendations of data sources for the international reporting for these plants. 

The results show that for 21 plants, accounting for about 49% of the CO₂ emissions of the 63 plants investigated, based on the Swedish energy statistics, no significant difference between the two data sources are identified.  

It was discovered during the project that not all plants in the energy production sector (CRF 1A1a) were included in the ETS data delivered by the Swedish EPA, and therefore many of the results on plants need further investigation to make correct comparisons. This report also gives suggestion on a few large industrial plants for which additional attention should be paid in future studies.