Kathmandu: Kathmandu’s air quality has worsened significantly, ranking it as the fifth most polluted city in the world with an Air Quality Index (AQI) of 180, according to the latest data.
Beijing, Kampala, Delhi, and Kuwait occupy the top four spots, with AQI levels ranging from 184 to 240. The deteriorating air quality in Kathmandu is attributed to local wind patterns and a western low-pressure system, which has prevented rainfall. The valley’s skies remain cloudy, further exacerbating pollution levels.
According to the Department of Environment, an AQI of 0-50 is considered good, 51-100 is moderate, and 101-150 is unhealthy for sensitive groups. When the index reaches 151-200, it is unhealthy, 201-300 is very unhealthy, and anything above 301 is categorized as hazardous.
The AQI measures the concentration of invisible pollutants, including fine particulate matter (PM2.5), carbon monoxide, sulfur, and nitrogen oxides. Particles smaller than 2.5 microns pose severe health risks, particularly for children, the elderly, and individuals with respiratory conditions.
With no immediate rainfall expected, authorities have urged residents to take precautionary measures, such as wearing masks and limiting outdoor activities, to minimize exposure to the harmful air.