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Air pollution has become a major environmental health issue in the world.Over the years, air pollution in Malaysia is contributed by growing numbers of air pollutant sources.This study identifies the trend of the particulate matters (PM2.5, PM10), gaseous pollutant (SO2, NO2, O3, CO) and meteorological factors (wind speed, relative humidity, and ambient temperature) at Kuala Terengganu.The study was conducted through descriptive analysis by using the air quality data of the selected parameters and meteorological data from year 2018 until 2022.Result of the study found that similar trend recorded for concentration PM2.5 and PM10.The study also found uniform trend of concentration for SO2, NO2, O3, CO, wind speed, relative humidity, and ambient temperature over the years.There are several times of unusual high concentration of the air pollutants and meteorological parameters which suspected due to external factors and events.Result of the correlation analysis shows that PM2.5 is strongly affected by concentration PM10 (r=0.900,p<0.01) and CO (r=0.500,p<0.05) and weakly negative correlated with relative humidity (r=-0.020,p<0.05) and wind speed (r=-0.035,p<0.05).A strong correlation between PM2.5 and CO indicated that human-caused emissions, such as those from vehicles and industries, were the main contributors of PM2.5, which is stable in the atmosphere.Poor air quality can have an impact on visibility, agricultural productivity, public health, and cultural and aesthetic values, it is essential to manage it by determine the cause and interrelationship of PM2.5 towards others gaseous pollutants and meteorological factors which can be use by local authority for decision making.
Ismail et al. (Wed,) studied this question.