Analysis of Air Quality in Delhi (First Half of 2026)
A new study by EnviroCatalysts examines air quality trends in Delhi from January 1 to June 20 in 2026, comparing it to the same period in 2025.
Key Findings
- Particulate Matter (PM2.5):
- Persistent high levels of PM2.5, despite a marginal decrease of 2.2% from 90 µg/m³ in 2025 to 88 µg/m³ in 2026.
- The proportion of days exceeding the national standard of 60 µg/m³ declined from 64.4% to 58.2%.
- Peak PM2.5 concentration recorded was 484 µg/m³ on January 18, surpassing the previous year's peak of 450 µg/m³.
- Particulate Matter (PM10):
- Average PM10 levels remained above 205 µg/m³, far exceeding the national standard of 100 µg/m³.
- Highest PM10 level reached 989 µg/m³ on April 3 due to dust storms and adverse weather.
- Nitrogen Dioxide (NO₂):
- Average concentrations reduced by 9.4%, from 48 µg/m³ in 2025 to 44 µg/m³ in 2026.
- Ground-Level Ozone:
- Declined by 20%, averaging 35 µg/m³.
Pollution Hotspots and Trends
- Areas near high-density transit corridors and commercial construction marked as severe 'red zones'.
- Consistently lower pollution levels observed in the Cantonment area, IMD Lodhi Road, and JNU.
- Peak pollution levels observed between midnight and 9 am, improving briefly between 3 pm and 6 pm.
Environmental and Health Implications
Despite reductions in NO₂ and ozone, Delhi failed the WHO's daily safety criteria:
- PM2.5: 99.5% of the time
- PM10: 99.4% of the time
- NO₂: 83.4% of the time
Jinitha Varghese from EnviroCatalysts highlighted that the adoption of BS-VI fuel and electric vehicles aids in reducing transport emissions, but stressed that air pollution is a persistent, year-round public health issue.
Recommendations
- Stricter enforcement at pollution hotspots.
- Tighter regulation of nighttime commercial transport.
- Stronger actions across the wider airshed to address structural public health crises.
