In accordance with Annex 2 of Decree 106/2025 Coll., which implements certain provisions of the Act on the Public Hydrometeorological Service, the Czech Hydrometeorological Institute (CHMI) provides yearbooks. The Yearbook “Air Pollution in the Czech Republic in the YYYY,” together with the published data yearbook “Summary Tabular Overview” and the methodological material “Data Collection, Processing, and Evaluation System,” provides a complete overview of air quality information in the Czech Republic for the given year. The air quality assessment is based on measured data collected within the ISKO framework, utilizing additional resources and mathematical tools. The data yearbook presents verified measured concentration data and information on the chemical composition of atmospheric precipitation from various locations, including aggregated data. The graphical yearbook offers summarized information with commentary in the form of detailed maps, graphs, and tables.
In accordance with Annex 2 of Decree No. 106/2025 Coll., implementing certain provisions of the Act on Public Hydrometeorological Service, the Czech Hydrometeorological Institute (CHMI) provides access to monthly reports assessing air quality. The Air Quality Division of the Czech Hydrometeorological Institute (CHMI) has been issuing reports from October 2014 to the end of 2023, evaluating air pollution and dispersion conditions in the Czech Republic for the preceding month. The aim of these reports is to provide the public with the most up-to-date information and assessments of the situation.
The evaluation primarily relies on measured concentrations of suspended particulate matter (PM10), which represents one of the major air quality issues. During the period from April to September, ground-level ozone concentrations are also assessed, as their levels often increase to the point of exceeding air quality limits during the warmer months.
If unusually high or above-limit concentrations of sulfur dioxide, nitrogen dioxide, or carbon monoxide occur during the evaluated month, the report also includes an assessment of these pollutants. Evaluations of air pollution by ground-level ozone, often referred to as a "summer" pollutant, are included in reports from April to September. Concentrations of other substances with air quality limits, such as benzo[a]pyrene and heavy metals, cannot be included in the monthly reports due to the time required for sampling and processing.