Air Quality Bulletin 4th Quarter 2025

Topic: Air Quality Bulletin

Document Type: Air Quality

In this edition of the bulletin, the concentrations, distribution patterns, and influences on air quality of the key air pollutants—PM, NO₂, CO, and SO₂—in October, November, and December 2025 are discussed. The influence of meteorological parameters such as
wind mean sea level pressure, rainfall, and the movement of the Inter-Tropical Discontinuity (ITD), which significantly affect the dispersion and concentration of pollutants across the country, is also discussed.