In accordance with Annex 2 of Decree …/2024, which implements certain provisions of the Act on the Public Hydrometeorological Service, the Czech Hydrometeorological Institute (CHMI) provides current operational (unverified) hourly data on outdoor air pollutants (pollutant concentrations from monitoring stations with automated measurement programs, as specified by Act No. 201/2012 Coll., on Air Protection).
The data made available include key pollutants with ambient air quality limits under current legislation: nitrogen dioxide (NO₂), nitrogen oxides (NOₓ), ground-level ozone (O₃), suspended particles PM₁₀ and PM₂.₅, sulfur dioxide (SO₂), and carbon monoxide (CO).
The data are based on measurements taken at stations owned by CHMI.
In accordance with Annex 2 of Decree …/2024, which implements certain provisions of the Act on the Public Hydrometeorological Service, the Czech Hydrometeorological Institute (CHMI) has made operational (unverified) primary and aggregated data available for outdoor air pollutants (pollutant concentrations from automatic monitoring stations, provided in the scope and temporal aggregations specified by Act No. 201/2012 Coll., on Air Protection).
The data include key pollutants with ambient air limit values under current legislation: arsenic (As), benzene, benzo[a]pyrene, cadmium (Cd), carbon monoxide (CO), nickel (Ni), nitrogen dioxide (NO₂), nitrogen oxides (NOₓ), ground-level ozone (O₃), lead (Pb), suspended particles PM₁₀, suspended particles PM₂.₅, and sulfur dioxide (SO₂).
The data are based on measurements from CHMI-owned stations since 1969. Primary data are provided in measurement intervals of 30 minutes, 1 hour, or 24 hours, depending on the type of measurement. Aggregated data are calculated from the aforementioned primary data and include the following: daily averages, monthly averages, annual averages, and the number of exceedances of ambient air limit values. Preliminary data include air quality information that is older than one hour. Verified data can be found in the dataset *Air Quality Measurements – Verified Data*, in accordance with the data verification process. Verification is carried out once a year, no later than July 1st (YYYY-1).
Zones and agglomerations layer for air quality assessment and management in the Czech Republic. The zones and agglomerations are defined on the basis of the legislative specifications of the EU Directive 2008/50/EC and Act No. 201/2012 Coll., on Air Protection. A zone is an area defined by the Ministry of the Environment for the purpose of monitoring and managing air quality; an agglomeration shall mean a zone that is a conurbation with a population in excess of 250 000 inhabitants.
In accordance with Annex 2 of Decree …/2024, which implements certain provisions of the Act on the Public Hydrometeorological Service, the Czech Hydrometeorological Institute (CHMI) has made verified primary and aggregated data available for outdoor air pollutants (pollutant concentrations from Concentration of pollutants from monitoring stations with automatic and manual programs, provided in the scope and temporal aggregations specified by Act No. 201/2012 Coll., on Air Protection).
The data include key pollutants with ambient air limit values under current legislation: arsenic (As), benzene, benzo[a]pyrene, cadmium (Cd), carbon monoxide (CO), nickel (Ni), nitrogen dioxide (NO₂), nitrogen oxides (NOx), ground-level ozone (O₃), lead (Pb), suspended particles PM10, suspended particles PM2.5, and sulfur dioxide (SO₂).
The data are based on measurements from CHMI-owned stations since 1969. Primary data are provided in measurement intervals of 30 minutes, 1 hour, or 24 hours, depending on the type of measurement. Aggregated data are calculated from the aforementioned primary data and include the following: daily averages, monthly averages, annual averages, and the number of exceedances of ambient air limit values.
The most recent verified data available date back approximately 18 months from the current date, in accordance with the data verification process.
Concentrations of air pollutants in the 1x1 km grid, years 2018–2022. Limit values for the protection of human health SO2 - 4th highest 24-hour SO2 concentration [µg.m-3], PM10 - annual average concentration [µg.m-3], PM10 - 36th highest 24-hour average concentration [µg.m-3], PM2.5 - annual average concentration [µg. m-3], NO2 - annual average concentration [µg.m-3], O3 - 26th highest maximum daily 8-hour moving average concentration averaged over 3 years, 2019-2021 [µg.m-3], As - annual average concentration [ng.m-3], Cd - annual average concentration [ng.m-3], benzo[a]pyrene - annual average concentration [ng.m-3], benzene - annual average concentration [µg.m-3]. Areas with exceedances of limit values without O3. Areas with exceedances of the limit values with the inclusion of O3. Limit values for the protection of ecosystems and vegetation O3 - AOT40 exposure index values, 5-year average, 2019-2023 [µg.m-3], NOx - annual average concentration [µg.m-3], SO2 - annual (annual average) and winter period (winter average) [µg.m-3].
Legislation (Act 201/2012 Coll., as amended) requires that the primary source of assessment be the results of stationary measurements. Measured concentrations may be supplemented by modelling and indicative measurements in the production of pollutant maps to ensure that the resulting estimate provides sufficient information on the spatial distribution of air pollutant concentrations. In the Czech Republic, the Eulerian chemical dispersion model CAMx is mainly used, additionally also the Gaussian model SYMOS and the European Eulerian model EMEP. In addition, in the case of individual pollutants, e.g. altitude or population density.
Act No. 201/2012 Coll., on Air Protection, as amended
The network of measuring stations registered in the ISKO database in 2018–2022. The basis for the air quality assessment is the concentrations measured at the monitoring stations. The measurement network is densest in the areas with the highest concentrations of pollutants, but covers the whole Czech Republic. The backbone network of monitoring stations is the National Air Quality Monitoring Network (NAQMN), operated by the CHMI. It includes both stations with an automated monitoring programme (AIM) and stations with a manual monitoring programme (MIM), from which the samples taken are analysed in the laboratories of the CHMI. In many cases, air pollution at one site is monitored simultaneously by both automatic and manual methods. The national network of concentration monitoring is supplemented by monitoring stations of other organisations, whose measurements are also used in the assessment of air quality.
Concentrations measured by all monitoring networks are stored in the AQIS air pollution database. The database contains data from the beginning of measurements, and sulphur dioxide and suspended particulate matter concentrations from the station networks of the CHMI in North Bohemia and Prague from 1971. Accompanying meteorological data, which are measured at a large part of the automated monitoring stations of the CHMI are used for the evaluation of air quality-meteorological relationships, are also stored in the ISKO database. In addition, the ISKO emission database also includes data provided by cooperating institutions. These include the Public Health Institute in Ostrava, the Public Health Institute in Ústí nad Labem, the National Institute of Health, ČEZ, a. s., municipal authorities and other contributors. The database also includes information from the border areas of Slovakia, Germany, Poland and Austria.
Overview of concentrations of air pollutants for which limit values for the protection of human health have been set, measured at station networks of ambient air quality monitoring in the Czech Republic: r18–r22As - List of stations with annual average concentrations of As, 2018–2022; r18–r22BaP - List of stations with annual average concentrations of benzo[a]pyrene, 2018–2022; r18–r22BZN – List of stations with annual average concentrations of benzene, 2018–2022; r18–r22Cd – List of stations with annual average concentrations of cadmium, 2018–2022; r18–r22NO2 – List of stations with concentrations of NO2 (annual average and 19. highest hourly concentrations), 2018–2022; r18–r22O3 – List of stations with ground-level ozone concentrations (max. daily 8-hour moving average, averaged over 3 years), 2018–2022; r18–r22PM10 – List of stations with PM10 concentrations (annual mean and 36. highest 24-hour concentrations), 2018–2022; r18–r22PM25 – List of stations with PM2.5 annual average concentrations, 2018–2022; r18–r22SO2zdr – List of stations with SO2 concentrations (25th highest hourly concentrations and 4th highest 24-hour concentrations), 2018–2022. Summary of concentrations of air pollutants for which immission limits are set to protect ecosystems and vegetation, measured at station networks of ambient air quality monitoring in the Czech Republic: r18–r22AOT40 – AOT40 exposure index values, 5-year average, 2018–2022 [µg. m-3.h]; r18–r22NOx – List of stations with annual average NOx concentrations, 2018–2022; r18–r22SO2zp – List of stations with SO2 concentrations (winter average), 2018–2022; r18–r22SO2rp – List of stations with annual average SO2 concentrations, 2018–2022.
According to Regulation 2018/1999 of the European Parliament and of the Council of the EU, all EU Member States are required to report their approximate (proxy) GHG emission inventories for year (t-1) by 31 July of the current year (t). These are only approximate estimates. Final GHG emission inventories are published the following year (t+1).
This website is updated based on information from regional authorities, which have been issuing permits since 1. 1. 2003.
The types of permits are the following:
Permits according to § 17 paragraphs 1 and 2 of Act 86/2002 Coll. – permits issued until 1. 9. 2012.
Permits according to § 11 paragraph 2 d) of Act 201/2012 Coll. – permits issued after 1. 9. 2012.
Integrated permits according to § 13 paragraph 3 of Act 76/2002 Coll. – for plants meeting certain criteria (primarily capacity constraints) within the categorization according to Annex 1 to Act 76/2002 Coll.
Act No. 262/2024 Coll., on the public hydrometeorological service as amended by implementing regulations
Yearly updated geographical navigator:
The geographic navigator presents overall annual information about facilities for the incineration and co-incineration of waste, which are obtained from summary operating records. These are the following: identification number (IČ), name of the facility, address of the operator, address of the facility, putting into operation, types of waste incinerated, nominal capacity, amount of waste incinerated in tonnes per year, number and brief description of incineration lines, enumeration of equipment for reducing emissions, annual emissions of all pollutants reported.
Act No. 262/2024 Coll., on the public hydrometeorological service as amended by implementing regulations
Informative Inventory Report – IIR pursuant to Directive No. 2016/2284 on the reduction of national emissions of certain air pollutants and Protocols to CLRTAP
Act No. 262/2024 Coll., on the public hydrometeorological service as amended by implementing regulations
Zones and agglomerations layer for air quality assessment and management in the Czech Republic. The zones and agglomerations are defined on the basis of the legislative specifications of the EU Directive 2008/50/EC and Act No. 201/2012 Coll., on Air Protection. A zone is an area defined by the Ministry of the Environment for the purpose of monitoring and managing air quality; an agglomeration shall mean a zone that is a conurbation with a population in excess of 250 000 inhabitants.
Concentrations of air pollutants in the 1x1 km grid, year 2023. Limit values for the protection of human health SO2 - 4th highest 24-hour SO2 concentration [µg.m-3], PM10 - annual average concentration [µg.m-3], PM10 - 36th highest 24-hour average concentration [µg.m-3], PM2.5 - annual average concentration [µg. m-3], NO2 - annual average concentration [µg.m-3], O3 - 26th highest maximum daily 8-hour moving average concentration averaged over 3 years, 2019-2021 [µg.m-3], As - annual average concentration [ng.m-3], Cd - annual average concentration [ng.m-3], benzo[a]pyrene - annual average concentration [ng.m-3], benzene - annual average concentration [µg.m-3]. Areas with exceedances of limit values without O3. Areas with exceedances of the limit values with the inclusion of O3. Limit values for the protection of ecosystems and vegetation O3 - AOT40 exposure index values, 5-year average, 2019-2023 [µg.m-3], NOx - annual average concentration [µg.m-3], SO2 - annual (annual average) and winter period (winter average) [µg.m-3].
Legislation (Act 201/2012 Coll., as amended) requires that the primary source of assessment be the results of stationary measurements. Measured concentrations may be supplemented by modelling and indicative measurements in the production of pollutant maps to ensure that the resulting estimate provides sufficient information on the spatial distribution of air pollutant concentrations. In the Czech Republic, the Eulerian chemical dispersion model CAMx is mainly used, additionally also the Gaussian model SYMOS and the European Eulerian model EMEP. In addition, in the case of individual pollutants, e.g. altitude or population density.
Act No. 201/2012 Coll., on Air Protection, as amended
The network of measuring stations registered in the ISKO database in 2023. The basis for the air quality assessment is the concentrations measured at the monitoring stations. The measurement network is densest in the areas with the highest concentrations of pollutants, but covers the whole Czech Republic. The backbone network of monitoring stations is the National Air Quality Monitoring Network (NAQMN), operated by the CHMI. It includes both stations with an automated monitoring programme (AIM) and stations with a manual monitoring programme (MIM), from which the samples taken are analysed in the laboratories of the CHMI. In many cases, air pollution at one site is monitored simultaneously by both automatic and manual methods. The national network of concentration monitoring is supplemented by monitoring stations of other organisations, whose measurements are also used in the assessment of air quality.
Concentrations measured by all monitoring networks are stored in the AQIS air pollution database. The database contains data from the beginning of measurements, and sulphur dioxide and suspended particulate matter concentrations from the station networks of the CHMI in North Bohemia and Prague from 1971. Accompanying meteorological data, which are measured at a large part of the automated monitoring stations of the CHMI are used for the evaluation of air quality-meteorological relationships, are also stored in the ISKO database. In addition, the ISKO emission database also includes data provided by cooperating institutions. These include the Public Health Institute in Ostrava, the Public Health Institute in Ústí nad Labem, the National Institute of Health, ČEZ, a. s., municipal authorities and other contributors. The database also includes information from the border areas of Slovakia, Germany, Poland and Austria.
Overview of concentrations of air pollutants for which limit values for the protection of human health have been set, measured at station networks of ambient air quality monitoring in the Czech Republic: r23As - List of stations with annual average concentrations of As, 2023; r23BaP - List of stations with annual average concentrations of benzo[a]pyrene, 2023; r23BZN – List of stations with annual average concentrations of benzene, 2023; r23Cd – List of stations with annual average concentrations of cadmium, 2023; r23NO2 – List of stations with concentrations of NO2 (annual average and 19. highest hourly concentrations), 2023; r23O3 – List of stations with ground-level ozone concentrations (max. daily 8-hour moving average, averaged over 3 years), 2023; r23PM10 – List of stations with PM10 concentrations (annual mean and 36. highest 24-hour concentrations), 2023; r23PM25 – List of stations with PM2.5 annual average concentrations, 2023; r23SO2zdr – List of stations with SO2 concentrations (25th highest hourly concentrations and 4th highest 24-hour concentrations), 2023. Summary of concentrations of air pollutants for which immission limits are set to protect ecosystems and vegetation, measured at station networks of ambient air quality monitoring in the Czech Republic: r23AOT40 – AOT40 exposure index values, 5-year average, 2023 [µg. m-3.h]; r23NOx – List of stations with annual average NOx concentrations, 2023; r23SO2zp – List of stations with SO2 concentrations (winter average), 2023; r23SO2rp – List of stations with annual average SO2 concentrations, 2023.
Feature layer depicting the location of springs where the observation of yield is performed. In the past, all springs were observed by volunteers. Currently, these springs are still partly monitored in this way, and partly monitored with equipment having a daily measurement frequency. The data are stored in the Central Regime Database of Groundwater which is maintained by the Hydrology Database and Water Budget Department.
Feature layer depicting the location of boreholes observing groundwater level in shallow and deep aquifers. Currently, most of the measuring objects are equipped with automatic stations that record locally or transmit the data. These stations record once a day. Originally, the boreholes were observed by volunteers with a weekly frequency of measurement. Most of new measuring objects were built during the so-called ISPA project. They went into operation in 2007. The data are stored in the Central Regime Database of Groundwater which is maintained by the Hydrology Database and Water Budget Department.
Feature layer with the location of water-gauging stations. Over 90% of measurements are carried out through automatic stations with locally stored records or transmitted records. Discharge is derived from observed water level using rating curves, which are determined based on hydrometric measurements. The data from these stations are stored in the Central Regime Database of Surface Water which is maintained by the Hydrology Database and Water Budget Department.
Monthly updated review of waste co-incineration facilities.
Information for this review is obtained from the periodic report of the Czech Environmental Inspectorate. The following information is monitored: change of operator or source name, technological modifications, changes in the composition of waste, source shutdown or start of operation. These reports also provide information about the performed measurements and compliance with emission limits. Some summary information (especially the amount of incinerated waste) is obtained from summary operating records. They are made public in the form of synoptic tables which contain following data: identification data (region, name of operator, name of facility, identification number (IČ), identification number of the operating unit (IČP), address of operator, address of facility) and operating data (putting into operation, capacity in tonnes per year, amount of waste incinerated in last three years in tonnes per year), emission limit values compliance and appropriate comments about operating changes, performed measurements etc.
Act No. 262/2024 Coll., on the public hydrometeorological service as amended by implementing regulations
Monthly updated review of waste incineration facilities:
Information for this review is obtained from the periodic report of the Czech Environmental Inspectorate. The following information is monitored: change of operator or source name, technological modifications, changes in the composition of waste, source shutdown or start of operation. These reports also provide information about the performed measurements and compliance with emission limits. Some summary information (especially the amount of incinerated waste) is obtained from summary operating records. They are made public in the form of synoptic tables which contain following data: identification data (region, name of operator, name of facility, identification number (IČ), identification number of the operating unit (IČP), address of operator, address of facility) and operating data (putting into operation, capacity in tonnes per year, amount of waste incinerated in last three years in tonnes per year), emission limit values compliance and appropriate comments about operating changes, performed measurements etc.
Act No. 262/2024 Coll., on the public hydrometeorological service as amended by implementing regulations
Layer of automatic meteorological, climatological and precipitation stations close to 1.06.2024
The Act no. 201/2012 Coll. on the Protection of Air.
Pollutant emissions projection according to the international obligations of the Czech Republic (EEA and EMEP)
Act No. 262/2024 Coll., on the public hydrometeorological service as amended by implementing regulations
In accordance with Act 123/1998 Coll. on free access to environmental information, as amended, the CHMI has provided verified primary and aggregated data on outdoor air pollutants. These are the main pollutants with limit values according to current legislation: arsenic (As), benzene, benzo[a]pyrene, cadmium (Cd), carbon monoxide (CO), nickel (Ni), nitrogen dioxide (NO2), nitrogen oxides (NOX), ground-level ozone (O3), lead (Pb), particulate matter (PM10), particulate matter (PM2.5), sulphur dioxide (SO2). The data are based on measurements at stations owned by the CHMI for the period 1969-2022. The primary data are presented in measurement intervals of 30 min, 1 h or 24 h, depending on the type of measurement. Aggregated data are calculated from the above primary data. These data are: daily mean values, monthly mean values, annual mean values and the number of exceedances of the limit values for the protection of human health. Verified data for subsequent calendar years from 2020 will always be available by 1 July of the following year.
Emission balance (national and regional) in the breakdown of REZZO 1-4 and in the structure of NFR (Nomenclature for reporting)
Act No. 262/2024 Coll., on the public hydrometeorological service as amended by implementing regulations
Summary data from reports in ISPOP (total emissions of operation units, categories of sources operated, types of fuels, total rated thermal input, etc.)
Act No. 262/2024 Coll., on the public hydrometeorological service as amended by implementing regulations