A method to improve the international comparability of emission data from industrial installations

Abstract Emissions from industrial installations are regulated under several international conventions and directives to prevent harmful impacts on environment and human health. Stricter limitations often exist in national legislations, or due to regional and local conditions, than in the international conventions. The international comparability of emission data from industrial installations is currently poor. Comparability is an essential element when the environmental performance of different installations or techniques is studied, as well as in reviewing data presented in emission registers. The availability of reliable and comparable data is an important requirement for the emissions trading market. Comparable emission data ought to be used when reviewing compliance with the national emission reduction targets established under international conventions, as well as in reviewing the compliance of industrial installations with the requirements set in the environmental permit conditions. There are currently no internationally agreed principles or a comprehensive strategy for production of emission data at the level of an industrial installation. The data production chain principle presented in this paper provides a tool for identifying elements that are essential in comparing emission data correctly and that need to be taken into consideration to ensure emission data reliability. The method was originally developed and applied in Finland for emission and impact monitoring of wastewaters from industrial installations and fisheries. Due to the implementation of the Integrated Pollution Prevention and Control (IPPC) directive the methodology was reconstructed for integrated emissions monitoring purposes. The data production principle was introduced for European use when preparing the BREF document on monitoring of emissions. It will also be relevant when the industrial installations report their emissions data to the Pollutant Release and Transfer Registers (PRTRs).