The text discusses the identification and evaluation of air quality in a specific region, specifically focusing on the levels of pollutants such as SO2, NO2, NOx, CO, benzene, O3, and suspended particulate matter (PM) with specific sizes (PM2.5 and PM10). It also mentions the consideration of lead, arsenic, cadmium, nickel, and a specific type of polycyclic aromatic hydrocarbon (BaP) in the assessment. This assessment is conducted in accordance with regulations set by the Ministry of Environment and refers to social norms and methods used for determining air quality levels. The text also references specific regulations and maps that outline designated areas for air quality assessment.