Pre and Post-Monsoon levels of ambient SO₂, NO₂, PM_2.5 and the trace metals Fe, Cu, etc. were measured at industrial and residential regions of the Kochi urban area in South India for a period of two years. The mean PM_2.5, SO₂ and NO₂ concentrations across all sites were 38.98 ± 1.38 µg/m³, 2.78 ± 0.85 µg/m³ and 11.90 ± 4.68 µg/m³ respectively, which is lower than many other Indian cities. There was little difference in any on the measured species between the seasons. A few sites exceeded the NAAQS (define acronym and state standard) and most of the sites exceeded WHO (define acronym and state standard) standard for PM_2.5. The average trace metal concentrations (ng/m³) were found to be Fe (32.58) > Zn (31.93) > Ni (10.13) > Cr (5.48) > Pb (5.37) > Cu (3.24). The maximum concentration of trace metals except Pb were reported in industrial areas. The enrichment factor, of metals relative to crustal material, indicated anthropogenic dominance over natural sources for the trace metal concentration in Kochi’s atmosphere. This work demonstrates the importance of air quality monitoring in this area.

在印度南部高知市区的工业和居民区，测量了季风前后季风前后的SO ₂，NO ₂，PM _2.5和微量金属Fe，Cu等的水平，为期两年。平均PM _2.5，SO ₂种NO ₂在所有站点浓度分别为38.98±1.38微克/米³，2.78±0.85微克/米³和11.90±4.68微克/米³分别低于其他许多印度城市。各个季节之间，被测物种之间几乎没有差异。少数站点超过了NAAQS（定义首字母缩写词和州标准），并且大多数站点超过了PM _2.5的WHO（定义首字母缩写词和州标准）标准。发现平均痕量金属浓度（ng / m ³）为Fe（32.58）> Zn（31.93）> Ni（10.13）> Cr（5.48）> Pb（5.37）> Cu（3.24）。据报道，工业区除Pb以外的痕量金属的最大浓度。金属相对于地壳物质的富集系数表明，高知大气中痕量金属的浓度比自然资源具有人为优势。这项工作证明了在这一领域进行空气质量监测的重要性。