Air pollution is a major environmental challenge plaguing our society in recent time and raises global concern because of its devastating consequences on public health and the environment. Despite availability of environmental policies and air quality standards, this issue seems unabated as the sources of air pollution in the area increases almost on a daily basis arising from different human activities including electricity generation from power plants. This study examined pollutants dispersion pattern due to atmospheric changes around gas power plants in south-south region. Air quality samples were obtained in-situ around the gas plant stations at various calibrated distances, 200, 400, 600, 800 and 1000m in the morning, afternoon and evening, each day at the sampled location over a period of 6 months (January to June), The main gases measured at each of the sampled locations and at different times of the day include Sulfur dioxide (SO2), Nitrogen oxides (NOX), Particulate matter (PM), Carbon dioxide (CO2), Methane (CH4), Carbon monoxide (CO), Hydrogen Sulphide (H2S), Ozone (O3) and Volatile Organic Compound (VOC). Descriptive statistics (standard deviation and means) were used to summarize the data measured. The student t test statistic was employed for the analysis. There was a significant difference in the pollutant concentration at the different times of the day at p<0.05 and the data showed that the early hours of the day had less pollutants concentration than at evening hours. There was also a significant difference in the pollutant concentration observed in the region as compared with the WHO standards. The study recommended periodic environmental auditing, reforestation, discouragement of deforestation within the vicinity of gas plants and constant air quality monitoring.