[en] A report about partial monitoring system 'Radioactivity of the environment' in the Slovak Republic in 2012 is presented. Slovak Hydrometeorological Institute (SHMI) integrates the national meteorological service, the national hydrological service and the national air pollution service. SHMI is governmental budgetary organisation directed by the Slovak Ministry of Environment. Staff number is about 500 employees. SHMI is certificated on ISO 9001. The radiation monitoring network of the Slovak Hydrometeorological Institute as a system of early warning is part of the radiation monitoring network of the Slovak Republic. It is based on the Law 355/2007, of 21 June, on preservation, encouragement and development of public health. This system fulfils a second function too: it is part of the environmental monitoring in the Slovak Republic on the base decision of Slovak Government. A Centre for the Partial monitoring system - Radioactivity of the environment was established at SHMI in 2000. All activities of radiation monitoring in the SHMI is financed from budget of governmental environment monitoring. SHMI operates 4 from 10 environmental monitoring subsystems in the Slovak Republic (Meteorology and Climatology, Water, Quality of Air, Radiation Monitoring). All active detectors are placed in the professional meteorological stations located throughout Slovakia. The first of these detectors was installed in 1999 and the last two detectors in 2002. The former type of detector FHZ 621B (FAG) was completely replaced. A Slovak product company Microstep-MIS detector RPSG-05 is in the test operation on the 3 monitoring sites from 2008. SHMI operates 2 aerosol sampling stations in Hurbanovo and Stropkov. Nominal flow rate is 200 m3/h. Filters from these stations are analysed in the Public Health Authority laboratories (Cs-137, Be-7). They are exposed 1 week per month and then they are sended to the laboratory for analysis. Radiation data (gamma dose rate in nSv/h) from all detectors in the automated meteorological stations are transmitted by data-logger and private SHMI network to the National Telecommunication Centre in Bratislava. The service program runs on the server RADMON in SHMI and every 10 minutes the data (dose rate and precipitation) from Stratus Continuum (message switch system) are inserted into the database. The 1 hour and 24 hour averages are computed on the server automatically. Delay between the time of measurement and time of inserting data to the database is only 10 min. The radiation files from the SHMI network are transmitted on-line to the information system of the Nuclear Regulatory Authority of the Slovak Republic. SHMI cooperates with the European Commission Joint Research Centre (EC JRC) at Ispra in the frame of EURDEP (European Union Data Exchange Platform) from 1998. In the 2008 Memorandum of Understanding between EC JRC and SHMI was signed. At present format EURDEP 2.0 from 1.12.2002 is used in the data exchange with EC JRC. A new format EURDEP XML is prepared. Data from the Slovak monitoring network is stored on the ftp server of SHMI every 1 hour and then the data is down-loaded to the Ispra database. The monitoring of gamma dose rates in the Slovak Hydrometeorological Institute is an important part of the early warning system, hazard management and monitoring of the environment. The radiation monitoring network is an integral part of SHMI monitoring activities. This network is equipped with metrological verified devices but they need revitalization in the short time. Data processing includes many mathematical and statistical analyses. SHMI is responsible for international data exchange with the European Commission and with partners in Austria and Hungary. (authors)