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<p align="LEFT">We summarize the investigations and results of recent empirical <span style="font-family: NimbusRomNo9L-Regu;">analysis on particulate matter </span><span style="font-family: CMTT12;">PM10 </span><span style="font-family: NimbusRomNo9L-Regu;">in Graz. The influence of meteorological </span>as well as anthropogenic factors is presented and discussed. Moreover we introduce a prediction model using current information and meteorological <span style="font-family: NimbusRomNo9L-Regu;">forecasts to predict the average concentration of particulate matter </span><span style="font-family: CMTT12;">PM10 </span><span style="font-family: NimbusRomNo9L-Regu;">for </span>the next day. Finally, we report on experiences with a test run carried out from December 16, 2004 until April 15, 2005.</p>