INTRODUCTION: Countries, including Turkey, have taken a series of lockdown measures in order to prevent COVID-19 pandemic from spreading. In our study, the aim was to examine the change in the air quality parameters of 31 cities which were affected by the strict measures taken in Turkey, during the months of March, April, and May the most, and their relationship with the activity parameters.
METHODS: 31 cities included in our study were assessed in terms of their average PM10, SO2, CO, NO2 and O3 values in the months of March, April, and May, between the years of 2017-2020, and their activity data in the same months of the year 2020, which have six different sub-dimensions.
RESULTS: When the 3-month average air parameters of the cities and the 3-month average parameters of the last 3 years are evaluated, PM10 decreased from 47.6 to 38.1 and NO2 from 54.8 to 25.7(P=0.001, P=0.001). When the change in the air quality parameter and the activity change corelation were evaluated, a statistically significant corelation with regards to Retail and Recreation, Workplaces and Residential, which are the three sub-dimensions of the SO2 change activity, was determined (P=0.034, P=0.002, P=0.003). In the linear regression models established, it was determined that Workplaces has a statistically significant relationship with regards to SO2 change (R2=0.339, p=0.038).
DISCUSSION AND CONCLUSION: These findings explain the scope of efforts and actions to be taken to ensure that all cities in our study have a clean and healthy atmosphere in terms of air pollutants.