The EU-LCI Working Group


Welcome to the website of the EC Subgroup on EU-LCI Values.

Our task is to derive and recommend EU-wide harmonised health-based reference values for the assessment of product emissions, based on the so-called ‘Lowest Concentration of Interest’ (LCI) concept. We were established by EC-JRC, Ispra in 2011 and are now constituted as a Sub-group of the Expert Group on Dangerous Substances within the larger committee structure of the EC Advisory Group on Construction Products. We use set procedures and protocols to establish EU-LCI values in a rigourous, scientific and transparent manner.

Our membership comprises a wide range of stakeholders and individual experts and an independent Chair (see ‘Members’ page), ensuring that our work is well informed and uninfluenced by potential conflicts of interest.


As explained in ECA Report No 29 “Harmonisation framework for health based evaluation of indoor emissions from construction products in the European Union using the EU-LCI concept” (see ‘Links’ page), the EU-LCI harmonisation process has established a robust protocol for establishing a harmonised list of compounds and their associated EU-LCI values that takes into account existing procedures used in some EU Member States. This procedure, based on sound toxicological and risk assessment principles, represents an appropriate health-protective, science-based and transparent yet pragmatic approach for the evaluation of chemical emissions from construction products. 

A list of EU-LCI values has now been produced (see ‘EU-LCI Values’ page). This includes some of the compounds most relevant to DG ENTR’s ad hoc group on emission classes (i.e., acetaldehyde, toluene, xylene, 1,2,4-trimethylbenzene, 1,4-dichlorobenzene, ethylbenzene, 2-butoxyethanol and styrene) and two compounds of recent concern in Germany (ε-Caprolactam) and Belgium (α-pinene).

A flexible framework is used that enables future revision of the content of the EU-LCI list in terms of both the type and number of compounds included and their associated EU-LCI values. The framework provides the possibility of taking into account new knowledge (e.g. data resulting from the REACH implementation process or compounds identified and suggested by EU national authorities).

The detailed protocol developed for the de novo derivation of EU-LCI values is based on a clear definition of EU-LCI and the establishment of a Data Compilation Sheet and a Summary Fact Sheet for each compound assessed. The Data Compilation Sheet contains all relevant toxicological data from different literature sources assimilated into one table. The Summary Fact Sheet has a standardised format and ensures that the derivation of EU-LCI values is transparent. It comprises four main sections: a) general information; b) toxicological database (values derived from the data compilation process); c) assessment factors; and d) the derivation of the EU-LCI value. At the end of the factsheet the rationale for the derivation of the EU-LCI is given. This succinctly explains/justifies the selection and use of key data in the derivation of the EU-LCI value, in particular the selection of the key study used to determine the point-of-departure value. It also, where necessary, explains/justifies the use of particular assessment factors, especially non-default factors. The protocol also provides guidance on applying a harmonised application of read-across and assessment factors in EU-LCI derivation. This whole process helps guarantee the fundamental principle of transparency.

The lists of EU-LCI values published on this website will be updated annually in December each year.

The EU-LCI work is now featured on the DG Growth website at:


EU-LCI values are not indoor air quality guidelines and are to be used only in the context of material emissions testing.

In the work performed to date, only volatile organic compounds (VOCs) have been considered. Very volatile organic compounds (VVOCs), semi-volatile organic compounds (SVOCs) and carcinogens have not yet been considered at this stage.