During this study field measurements were carried out at a territory of coal transshipment company. Using the solid particle concentration detection system Casella Dust Detective kit, concentration monitoring of total particulate matter (TSP), PM10 and PM2.5 was carried out. After comparison of results with concentration values set in normative documents of Latvia and EU, it was found out that average 17 diurnal day concentration values of PM10 exceeded normative values for nine times. PM2.5 daily average concentrations of 12 days exceeded for four times exceeded the value of 25 µg/m3, which is mentioned in Directive 2008/50/EC of EU. The obtained results prove that there is an urgent problem with significant particulate matter emissions into the air at the coal transshipment site. After analysis of wind behaviour impact on the concentration values it is now understood that if wind comes from the dust emission source to the measurement system, the increase in wind speed increases particle concentration as all particles in the air and those raised from coal piles are driven towards the equipment. If wind comes from the opposite direction, the decrease of wind velocity results in an increase of concentration values as emitted dust cloud stays within the territory of the measurement. It was observed that wind speed causes the concentrations to change gradually, but wind direction is responsible for rapid concentration changes.