Air Quality Index

Delhi was the most polluted city during 2024-25, recording the highest annual PM2.5 levels and extended periods of "severe" air quality in winter while Patna was the second-most polluted city, according to a new analysis by Climate Trends. Climate Trends is a research-based consulting and capacity-building initiative that aims to bring greater focus on issues of environment, climate change and sustainable development. Based on Central Pollution Control Board (CPCB) air quality monitoring data, this report analysed how meteorological conditions influence the persistence of PM2.5 pollution across six major Indian cities such as Delhi, Patna, Kolkata, Mumbai, Chennai and Bengaluru. Using CPCB air quality data (2024-2025) combined with meteorological clustering, the study distinguished emission-driven pollution from weather-driven variability. "Delhi continues to face the most severe pollution crisis nationally with the highest annual average PM2.5 levels and the longest stretches of ..

Even as summer heat arrives early in Delhi, pollution stays high with AQI in 'poor' range. Experts warn prolonged exposure may affect children, elderly, and those with respiratory issues

Overall AQI at 208 with 25 stations in 'poor' category; warm night and cloudy skies push minimum temperature well above normal across the capital

AQI crossed 200 in Delhi after three days of 'moderate' air quality as IMD data showed the city recorded its hottest first week of March day in 50 years

Overall AQI climbs to 227 with most monitoring stations in poor category; Mundka records 'very poor' air quality despite clear skies and warm conditions

Overall air quality index stands at 151 with most monitoring stations in moderate category; clear skies and warm conditions expected across the national capital

Air quality stands at 135 in moderate category; strong surface winds and clear skies likely to aid further dispersal of pollutants across the national capital

Weather conditions in the capital are turning warmer. The India Meteorological Department (IMD) has forecast mainly clear skies with sustained surface winds of 15-25 kmph in Delhi

Out of the 44 stations, 27 record 'poor' air quality while Punjabi Bagh turns severe at 368; IMD forecasts stronger surface winds that may help disperse pollutants and ease pollution levels

Overall AQI in the national capital was 176, with 35 stations in the 'moderate' category; IMD forecasts strong surface winds and clear skies to further improve air quality

Air quality in Delhi remained in the 'poor' category on Sunday as the mercury rose, with Delhi recording its hottest February day in three years on Saturday

Air quality in the national capital deteriorated again on Saturday while the maximum temperature continued to remain above 30 degrees Celsius- higher than the seasonal average

Majority of the city's monitoring stations report 'moderate' air, but some areas such as Anand Vihar remain polluted; temperatures likely to stay above normal with partly cloudy skies today

Air quality shows marginal improvement across Delhi, with 21 stations in the poor category; IMD forecasts clear skies, rising temperatures and no rainfall over the next seven days

Majority of monitoring stations in the city record 'poor' AQI levels as Anand Vihar remains worst hit at 342; maximum temperature likely to touch 31 degrees Celsius

Monitoring stations like Anand Vihar and Wazirpur, record AQI above 300 even as clear skies and moderate winds prevail across the national capital

The weather department's latest bulletin indicates that both minimum and maximum temperatures are likely to remain above normal in the coming days

Air quality in Delhi slips to 'very poor' levels on Sunday, while CAQM mandates stricter emission norms for industries across NCR. Mercury is set to touch 30 degrees Celsius

Twenty monitoring stations in the 'poor' category and 18 in 'moderate'; CAQM issues fresh statutory direction to tighten dust control and C&D waste management across Delhi-NCR

The Supreme Court observed that expanding green cover is a sustainable, long-term measure to improve Delhi-NCR's air quality as it reconstituted an expert panel for afforestation efforts