An integrated approach to understanding all measured pollutants with multi-discipline in different time scales and understanding the mechanisms hidden under low Air Quality conditions are essential for tackling potential air pollution issues. Sivas is a province located in the Eastern region of Türkiye with a developing industry and a growing population, and its climate is known as arid and cold. Since the end of 2016, the province has started to replace the habit of using coal for domestic heating and industry with natural gas. Despite this development, especially in Fine Particulate Matter (PM2.5), the province reaches very high pollution values every winter, threatening public health. In this study, the air pollution of Sivas province was analysed with meteorological and PM2.5 data over six years. It was found that the winter period (January-February-November-December) of every year except 2019 -which has missing data- is the period with the highest air pollution in the province. In addition, the fact that the days exceeding the daily PM2.5 limit values in 2016, 2017, 2020 and 2021 were also seen in the spring and summer months caused the study to focus on additional emission sources such as long-range dust transport and road vehicles. The year 2017, which has the highest values, was analysed in detail. Pollution periods with the highest episodes in 2018 were analysed with the HYSPLIT and DREAM models. As a result of the study, the average PM2.5 values in 2017 were found to be 31.66 ± 19.2 µg/m3 and a correlation of -0.49 between temperature and PM2.5. As a result of model outputs, it was observed that the inversion is intensely observed in the province, which is associated with an increase of PM2.5 during the episodes. Especially on days with daily average PM2.5 values above 100 µg/m3, dust transport from the Arabian Peninsula is observed. Additionally, analysis of Planetary Boundary Layer (PBL) data and PM pollution revealed a significant negative correlation (r=-0.61). It was noted that pollution persisted over the province during low PBL hours, particularly during high PM2.5 concentration periods.