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Delhi's Air Quality: PM2.5 Persists Despite Other Gains
24 Jun
Summary
- PM2.5 levels in Delhi remained high in early 2026, despite NO2 and ozone decreases.
- Peak PM2.5 readings hit 876 µg/m³ in pollution hotspots like Anand Vihar.
- Delhi fails WHO air quality standards on 99.5% of days for PM2.5.
A new analysis reveals Delhi's air quality in early 2026 presented a complex picture. While pollutants like nitrogen dioxide and ground-level ozone saw reductions, fine particulate matter (PM2.5) remained persistently elevated. During intense winter pollution events in mid-January, areas such as Anand Vihar registered PM2.5 concentrations as high as 876 µg/m³.
Overall, average PM2.5 concentrations experienced a slight decrease of 2.2% compared to the previous year. However, the daily national standard for PM2.5 was exceeded more than half the time. Coarser particulate matter (PM10) showed no significant improvement, consistently exceeding national standards.
Pollutants primarily linked to vehicle emissions, such as nitrogen dioxide (NO₂) and ground-level ozone, did show improvements. This is attributed to factors like cleaner fuel standards and increasing electric vehicle adoption.
Despite these specific gains, Delhi's air quality largely falls short of World Health Organization guidelines. The city failed WHO's daily safety criteria for PM2.5 on 99.5% of observed days, indicating a continuous public health challenge that extends beyond seasonal winter concerns.
