Özet:

Particulate matter (PM2.5) concentrations were measured by using a high volume sampler in summer (July 2018 - September 2018) and winter seasons (November 2018 - January 2019) in Izmit Country. Samples were collected at 14 points to determine the discrepancy in spatial distribution. PM2.5 samples were collected using a quartz filter at a flow rate of 1.13 m3 min-1 for 24 hours. The mean concentration of PM2.5 in the summer and winter seasons for the 14 sampling points was measured as 22.11 ± 4.30 µg m-3, 45.44 ± 18.71 µg m-3, respectively. The highest and lowest concentrations of PM2.5 were found in the winter season. It was determined that the concentrations measured in the sampling areas of Sepetçiler, Yeşilova, 28 Haziran and Kabaoğlu during the winter months are lower than the concentrations measured in the summer months. According to the spatial distribution, the lowest pollution was observed in the 28 Haziran District, while the highest pollution was observed in the Cedit District and the Sanayi District. It has been determined that these regions are affected by different sources of pollution compared to other urban and traffic-related regions. It has been determined that the K/Y ratio is below 1 in 28 Haziran District, Yeşilova District and Sepetçiler District due to soil resource, 1 in Kabaoğlu District and above 1 due to the use of fossil fuels for heating in other sampling areas.

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