The European Commission's Joint Research Centre (JRC) has published a report on environmental radioactivity levels in the European Community in 1993. This report is the 27th in an annual series documenting environmental radioactivity data submitted by Member States to the Commission under the terms of Article 36 of the Euratom Treaty. The report continues the attempt to improve the clarity of presentation of information on low levels of radioactivity in the European environment by making use of standardized reporting levels. These are supported by the presentation of more detailed radioactivity levels from a limited number of stations that provide high sensitivity measurements. Figures for Austria, Finland and Sweden are also fully incorporated into the report for the first time. All the results obtained from the Member States are introduced into a REM data-bank by the Environment Institute of the JRC, which collected, collated and loaded the data to prepare the statistics and figures for the report. The report is divided into three main parts: - A general introduction and data for eleven nuclide categories in five sampling media: . Airborne particulates: Be-7, Cs-137; . Surface water: Cs-137; . Drinking water: H-3, Sr-90, Cs-137; . Milk: Sr-90, Cs-137; . Mixed diet: Sr-90, Cs-137; - Results presented by sample and nuclide type; - Additional information on the Euratom Treaty, the calculation of reporting levels, averaging procedures, data sources, information on the REM data bank and contact details and reports from national authorities.