Air Pollution Concentration in Ulaanbaatar (2002-2026)

Monthly average PM2.5 and PM10 particulate matter concentrations in Ulaanbaatar from 2002 to 2026, averaged across city monitoring stations. PM2.5 peaked at 0.622 mg/m³ in winter months — over 40 times the WHO annual guideline of 0.015 mg/m³, highlighting the severity of UB's winter air pollution crisis.