NEW DELHI, March 24, 2026 — India has been ranked as the sixth most polluted country globally in the 2025 World Air Quality Report released on Tuesday. Despite a recorded decline in specific particulate matter concentrations over the last year, the report by Swiss air quality technology company IQAir confirms that India continues to face significant challenges in meeting international air safety standards.
What Authorities Said
India’s population-weighted average PM2.5 concentration was recorded at 48.9 micrograms per cubic metre (µg/m³) for the year 2025. This represents a 3% decrease from 2024 and a 10% drop compared to 2023 levels.
The report, which analyzed data from 143 countries and 9,446 cities, noted several key findings regarding India’s standing:
- Global Ranking: India now stands behind Tajikistan, Chad, and the Democratic Republic of Congo in the list of most polluted nations.
- Capital City Status: New Delhi saw its PM2.5 levels drop from 108.3 µg/m³ in 2024 to 82.2 µg/m³ in 2025. However, the article states that New Delhi continues to be classified as the world’s most polluted capital city.
- Pollution Hotspots: While Begusarai and Byrnihat led the rankings in previous years, Loni in Uttar Pradesh emerged as the most polluted city in 2025, with a PM2.5 concentration of 112.5 µg/m³.
The report highlighted that while there is a broadening of air quality monitoring across more countries, the enforcement of regulations on industrial and vehicular emissions in India remains inadequate.
What This Means for Residents
Based on the details provided in the report, the reduction in PM2.5 levels suggests that while some progress is being made, the air remains nearly ten times higher than the World Health Organization’s (WHO) annual safety guidelines.
For residents of the Delhi-NCR and other high-pollution zones like Loni, the data implies:
- Persistent Health Risks: PM2.5 is identified in the report as the most harmful particulate because it can enter the bloodstream and lungs, leading to respiratory and cardiovascular issues.
- Urban vs. Rural Divide: The expansion of the monitoring network to over 9,000 cities shows that while major metros like Delhi are seeing slight improvements, smaller industrial hubs (like Loni) are emerging as new critical hotspots.
- Enforcement Gaps: The article notes that the current decline may be influenced by meteorological factors, as regulatory enforcement on the ground has yet to meet the necessary benchmarks for long-term air quality stability.
What is India’s current global rank in air pollution? According to the 2025 World Air Quality Report, India is ranked as the sixth most polluted country in the world.
Is air quality in New Delhi improving? Yes, the report shows that New Delhi’s PM2.5 levels decreased from 108.3 µg/m³ in 2024 to 82.2 µg/m³ in 2025, though it remains the world’s most polluted capital.
Which city was named the most polluted in the 2025 report? Loni in Uttar Pradesh was identified as the most polluted city, recording a PM2.5 concentration of 112.5 µg/m³.
How does India’s PM2.5 level compare to WHO guidelines? At 48.9 µg/m³, India’s average concentration is nearly ten times the safe limit recommended by the World Health Organization.
I’am Siddharth a Air pollution analysts are environmental expert who collect, analyze, and interpret air quality data to identify pollutant sources & develop solutions for reducing atmospheric contamination.