Apr 23, Kathmandu - Kathmandu Valley has experienced a sharp resurgence in air pollution in recent days, reversing the temporary improvement caused by rainfall. The air quality, which was previously better, has now deteriorated to hazardous levels.

According to the Air Quality Index (AQI), the pollution level was around 92 on Tuesday afternoon but has surged to 247 as of 11 a.m. today. This level is considered dangerous and poses health risks to the general public, including sensitive groups.

The AQI scale classifies 0–50 as Good, 51–100 as Moderate, 101–150 as Unhealthy for Sensitive Groups, 151–200 as Unhealthy for All, 201–300 as Very Unhealthy, and above 300 as Hazardous.

Environmental Department Director Gyanraj Subedi attributed the rise in pollution to the absence of rainfall, increasing drought conditions, the burning of agricultural residues, and forest fires. He explained that without rain to settle dust and smoke particles, these pollutants remain suspended in the atmosphere, worsening air quality.

Meteorologist Binu Maharjan from the Department of Hydrology and Meteorology added that significant rainfall in the coming days is unlikely, and temperatures are expected to rise further. These factors could exacerbate air pollution levels.

Children, the elderly, and individuals with respiratory and heart conditions are particularly vulnerable. Health experts recommend avoiding outdoor activities unless necessary, wearing masks, and taking precautions against dust and smoke exposure.