The pollutants emission during the process of municipal solid waste management (MSWM) is of great concern due to its hazardous effect on the environment and living organisms. An assessment of the air quality of MSWM sites was made after having 16 repetitive visits at solid waste disposal sites and transfer stations of Lahore during wet and dry seasons. Pollution parameters such as fine particulate matter (PM_2.5) and greenhouse gases (GHG) were measured along with meteorological parameters. PM_2.5 measurement was made by using particle counter Dylos and TSI’s Dust Trak. Both of these instruments were positioned simultaneously at the source site and downwind (50 m). CH₄ and meteorological parameters were measured by Aeroqual 500 series, while the Extech CO220 monitor was used to measure CO₂ concentration. An assessment of air quality showed the levels of their mean values as CH₄ and CO₂ ranged between 1.5–13.7 ppm and 443.4–515.7 ppm, respectively. The PM_2.5 ranged between 127.1 and 307.1 µg/m³ at sources and 172.3 and 403.8 µg/m³ downwind (50 m). GHG showed lower levels than the proposed limit value, which could not cause any health issues, while PM_2.5 was 6–10 times higher than the Pak-EPA established standards. Higher pollutant concentration was recorded in the dry season than the wet season. Regression analysis was performed to predict correlation of PM_2.5 with GHG and meteorological parameters. GHG as well as meteorological parameters also exhibited a correlation with PM_2.5. It was estimated that the ambient air of such sites is not safe for public health. So, it is necessary to use safe practices for MSWM and its emission control to prevent nearby communities and the environment.

The presence of heavy metals in municipal solid waste is of emerging concern. In order to provide information on the concentration of heavy metals chromium (Cr), manganese (Mn), zinc (Zn), lead (Pb), nickel (Ni) and copper (Cu) in air samples of solid waste management sites, a total of 16 times survey was made at solid waste disposal sites and transfer stations of Lahore, Pakistan. Four sites were selected for sampling during the period of 2017-2018 on the basis of wet and dry season.Portable air sampler was used for sucking the air on Whatmann 41 filter paper for the collection of air samples. Metrological parameters were also measured during sampling period. Samples were analyzed by acid digestion and flame atomic absorption spectrophotometer. The average concentration of Cr, Mn, Zn, Pb, Ni and Cu in ambient air ranged between 0.09-1.97 µg/m3, 0.09-0.25 µg/m3, 2.18-6.15 µg/m3, 0.59-1.24 µg/m3, 0.27-0.34 µg/m3,0.25-0.47 µg/m3 in wet season and 0.13-2.19 µg/m3, 0.01-0.61 µg/m3, 0.22-4.96 µg/m3, 0.31-1.46 µg/m3, 0.29-0.32 µg/m3, 0.17-0.36 µg/m3 in dry season respectively.Statistical analysis (ANOVA) showed that the concentration of metals Zn, Pb and Cu was significant at four sampling sites and in both season. The relationship between metrological parameters and heavy metals were also statistically evaluated. It was determined that the ambient air within services of solid waste management sites is unsafe for adjacent population. Though more information is required to suggest the extreme separation at which air from these localities go to the encompassing level.