India monthly ambient air quality snapshot: June 2024

Authors: Manoj Kumar N and Sunil Dahiya

Key highlights

  • Four new continuous ambient air quality monitoring stations (CAAQMS) were installed in June 2024: one in Pune, two in Asansol, and one in Howrah. This increased the national total to 545 stations.
  • In June 2024, 228 out of 251 cities with more than 80% of the days with CAAQMS data recorded PM2.5 concentrations below India’s daily National Ambient Air Quality Standards (NAAQS) of 60 µg/m³. Only 33 cities complied with the World Health Organization’s daily safe guideline concentration of 15 µg/m³.
    • In June 2024, the monthly average PM2.5 levels in 88 National Clean Air Programme (NCAP) cities (out of 96 cities with more than 80% days with data) surpassed the WHO’s daily guideline for PM2.5, while 89 cities met India’s daily National Ambient Air Quality Standards (NAAQS).
    • Among the 155 non-NCAP cities with over 80% of days with CAAQMS data, 25 cities reported monthly average PM2.5 levels below the WHO daily guideline. 139 cities adhered to the daily NAAQS, while the air quality in the remaining 16 cities was poorer than the NAAQS.
  • June 2024 experienced a considerable improvement in air quality, with 130 cities falling under the ‘Good’ category, a stark contrast to May’s 98 cities. May 2024 witnessed 114 cities classified as ‘Satisfactory’ and 31 as ‘Moderate’, while June saw a slight decline to 98 and 20, respectively. In June, only three cities fell into the ‘Poor’ category, a significant decrease from the 11 cities in May.
  • Rohtak in Haryana ranked as the most polluted city in India in June 2024, recording a monthly average PM2.5 concentration of 116 µg/m³, surpassing the daily NAAQS 100% of the days in the month. Among India’s top 10 polluted cities, five were located in Haryana, two in Rajasthan, while Punjab, Assam, and Bihar each had one. 
  • Ranking as India’s 22nd most polluted city in June 2024, Delhi’s PM2.5 pollution levels exceeded the NAAQS and were about four times the WHO daily guideline levels at 63 µg/m³. 
  • Other megacities, such as Chennai, Mumbai, and Bangalore, had PM2.5 concentrations below the NAAQS, with all days in June falling within the ‘Good’ category (0-30 µg/m³).
  • A total of 60 cities were featured in the daily most polluted cities list in June 2024. Of this, 23 made an appearance at least five times over the 30-day period, topped by Rohtak in Haryana, which featured the most times (28 days), followed by Mandi Gobindgarh (17 days), Charkhi Dadri (16 days), Panchkula (16 days), Byrnihat (14 days), Ludhiana (13 days), Bhiwadi (12 days), and Ballabgarh (11 days).
  • In June 2024, the cities featured in the daily top 10 most polluted cities list in India were spread across 12 states and union territories (UT), showing how widespread and severe toxic air is across the country.
  • Only 14 out of the 60 cities featured in the daily top 10 most polluted cities list during June 2024 are part of the NCAP. The remaining 46 are devoid of any action plan to reduce hazardous air pollution concentrations.
  • Among the eighteen million-plus cities in the Indo-Gangetic Plain with CAAQMS data for more than 80% of the days, five cities—Faridabad, Ludhiana, Asansol, Amritsar, and Delhi—exceeded the NAAQS.

Monthly ambient air quality snapshot for India: June 2024

Monthly ambient air quality trends in India: June 2024 air quality snapshot (pdf version)

Data sources

Ambient air quality data recorded by Continuous Ambient Air Quality Monitoring Stations (CAAQMS) is downloaded from the ‘Central Control Room for Air Quality Management – All India‘ dashboard operated by the Central Pollution Control Board (CPCB).

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