This Programme for measuring the level of air pollution (air quality or the concentration of a pollutant in the air or its deposition on surfaces in a certain time) in stations of the state network for permanent monitoring of air quality, which are determined by article 4 of the Decree determining the list of measuring points for monitoring concentrations of certain pollutants in the air and locations of measuring stations in the national network for permanent monitoring of air quality (published in the Official Gazette of the Republic of Croatia 107/2022) contains: the Programme A Measurement of air quality in stations established in agglomerations; and Programme B - Measurement of air quality in stations established in zones.