Kathmandu Ranked Second Most Polluted City

Kathmandu ranked as the world’s second most polluted major city on April 23, with air quality monitors putting Nepal’s capital behind only Lahore. (thehimalayantimes.com) (myrepublica.nagariknetwork.com) IQAir data cited by Nepali outlets showed Kathmandu at a US Air Quality Index of 197 around midday, then 211 later on Thursday. MyRepublica reported the city had peaked at 247 earlier in the day, a level classified as “very unhealthy.” (thehimalayantimes.com) (myrepublica.nagariknetwork.com) The most dangerous pollutant in the spike was PM2.5, tiny particles small enough to pass deep into the lungs and bloodstream. The Himalayan Times reported Kathmandu’s PM2.5 concentration at 161.7 micrograms per cubic metre, against the World Health Organization annual guideline of 5. (thehimalayantimes.com) (kathmandupost.com) The surge followed a brief weather-driven reprieve earlier in April, when rain and wind had temporarily cleared the valley. By April 15, the Kathmandu Post reported PM2.5 readings near or above 200 micrograms per cubic metre in many parts of the capital again. (kathmandupost.com) Experts cited a familiar mix of causes: forest fires, crop-residue burning in the Tarai, dust and stagnant pre-monsoon air. IQAir said Kathmandu’s bowl-shaped valley geography traps smoke and dust when wind and rainfall are weak. (kathmandupost.com) (iqair.com) The health burden is national, not just urban. The World Bank said in June 2025 that air pollution is Nepal’s top risk factor for death and disability, cutting average life expectancy by 3.4 years and causing about 26,000 premature deaths a year. (worldbank.org) Nepal’s government says it is building out monitoring and cleaner-air policy. The World Bank quoted Forests and Environment Minister Ain Bahadur Shahi Thakuri saying the government is committed to stricter industrial standards and more electric transport, while the Department of Environment says it is running air-quality monitoring and a Kathmandu Valley action plan. (worldbank.org) (doenv.gov.np) For residents, the official advice was immediate and practical: avoid outdoor exercise, close windows, wear masks outside and use air purifiers indoors if available. Forecasts cited by The Himalayan Times suggested some relief with rain, but air was expected to stay unhealthy through the weekend. (thehimalayantimes.com)