Comparative analysis of indoor and outdoor concentration of PM10 particulate matter on example of Cracow City Center

Abstract

Article concerns the problems of air pollution with PM10 particulate matter in Cracow. An indoor concentration of PM10, along with the outside air pollution, was observed in the period between January and March. Comparative analysis was carried out, especially for the periods with exceptionally high outside concentration of PM10. Both outside and inside concentration results were subjected to analyses on raw and averaged (minute, hourly, daily) data, along with extreme values. The results of investigations showed that for the time periods with extremely high concentration of particulate matter suspended in the air outside, the air quality indoor was also poor. In general, after exceeding the value 250 μg/m3, PM10 concentration inside building was higher than outside, especially during night time. Analysis of the relationship between PM10 concentration and air temperature and wind speed showed higher correlation between PM10 and wind speed; however, the relationship PM10–temperature appeared significant, too.