*Article* **Case Study of Pollution with Particulate Matter in Selected Locations of Polish Cities**

**Remigiusz Jasi ´nski, Marta Galant-Goł ˛ebiewska, Mateusz Nowak, Monika Ginter, Paula Kurzawska, Karolina Kurtyka \* and Marta Maciejewska**

> Faculty of Civil Engineering, Institute of Combustion Engines and Powertrains, Poznan University of Technology, Piotrowo 3 Str., 60965 Poznan, Poland; remigiusz.jasinski@put.poznan.pl (R.J.); marta.galant@put.poznan.pl (M.G.-G.); Mateusz.s.nowak@put.poznan.pl (M.N.); monika.t.kardach@doctorate.put.poznan.pl (M.G.); paula.kurzawska@put.poznan.pl (P.K.); marta.maciejewska@put.poznan.pl (M.M.)

**\*** Correspondence: karolina.t.kurtyka@doctorate.put.poznan.pl

**Abstract:** Despite the introduction of increasingly restrictive regulations, the air quality in Poland is still considered one of the worst in Europe. Two cities (Wroclaw and Cracow) were selected for this study, so they represent a pair of Polish cities with poor air quality, and at the same time are academic cities, popular with tourists. The article focuses on the emission of particulate matter, which is one of the most dangerous components of air pollution. The focus was on particles less than 10 μm in diameter which are most often neglected at measuring stations. We have identified the sources of particulate emissions in selected locations in Wroclaw and Cracow, and then measured particles in terms of their mass and number distribution. It was noted that the PM10 emission values obtained as a result of the measurements were different from the value specified by the Inspectorate of the Environmental Protection in Poland.

**Keywords:** urban air quality; PM2.5; PM10; particle emission sources
