NewKerala.com

Delhi's Air Quality Hits 7-Year High in 2025, Marking a Historic Turnaround

Delhi's air quality in 2025 showed significant improvement, marking the best annual performance in seven years when excluding the anomalous COVID year of 2020. The city recorded 79 days with 'Good' to 'Satisfactory' air, the second-highest count since 2018, alongside notable drops in average PM2.5 and PM10 concentration levels. Officials credit the sustained, coordinated efforts of the Commission for Air Quality Management and its targeted policy measures for these gains. While severe winter pollution episodes remain a challenge, the data indicates that long-term structural interventions are beginning to yield measurable results for the capital's atmosphere.

Key Points: Delhi's Best Air Quality in 7 Years Recorded in 2025

  • Lowest PM2.5 & PM10 since 2018
  • 79 'Good' to 'Satisfactory' AQI days
  • Only 8 'Severe+' air days in 2025
  • Gains attributed to CAQM policy enforcement
2 min read

'Delhi recorded best air quality in seven years in 2025, barring COVID period'

Delhi recorded its best annual air quality since 2018 in 2025, with lower PM2.5 levels and more 'Good' AQI days, driven by sustained policy action.

"With sustained field-level efforts... Delhi's air quality is expected to show further gradual but marked improvement year on year. - Officials"

New Delhi, Dec 31

Delhi witnessed a significant improvement in its air quality in 2025, recording the lowest average PM2.5 and PM10 concentration levels in the last seven years, barring the COVID-affected year of 2020, according to official data. The year also saw the highest number of 'Good' to 'Satisfactory' Air Quality Index days since 2018, excluding 2020.

Data shows that 2025 recorded 79 days with AQI between 0 and 100, placing them in the 'Good' and 'Satisfactory' categories. This is the second-highest count after 2020, when pandemic-related restrictions had sharply reduced pollution levels. In comparison, Delhi recorded 66 such days in 2024, 61 in 2023, and 53 in 2018.

The Commission for Air Quality Management (CAQM), established in 2021 for the National Capital Region and adjoining areas, attributed the improvement to sustained policy measures and consistent field-level action. Since its inception, CAQM has issued multiple directions, advisories and orders targeting pollution sources, along with year-round coordination among stakeholders.

Despite challenging meteorological conditions, 2025 recorded only eight 'Severe to Severe+' AQI days, the second-lowest number since 2018. This is significantly lower than 2019, which witnessed 25 such days. Officials noted that stagnant wind conditions and unfavourable weather during December 2025 led to a high monthly average AQI of 351, but this did not offset the overall annual improvement.

Every month, February and July 2025 registered the lowest average AQI for these months since 2018, even lower than the COVID year. Moreover, January, May and June 2025 recorded the second-lowest average AQI levels in the last seven years, barring 2020.

Annual data further underlines the trend. Delhi's average AQI in 2025 stood at 201, the lowest since 2018, except for 2020. For comparison, the average AQI was 209 in 2024, 204 in 2023, and 225 in 2018.

Particulate matter levels also showed improvement. The daily average PM10 concentration in 2025 was 197 µg/m³, down from 212 µg/m³ in 2024 and 241 µg/m³ in 2018. Similarly, daily average PM2.5 levels fell to 96 µg/m³ in 2025, compared to 104 µg/m³ in 2024 and 113 µg/m³ in 2018. Again, only the year 2020 recorded lower averages.

Officials said the gains reflect persistent enforcement, targeted interventions, and long-term pollution control strategies, even as seasonal and meteorological challenges continue to affect winter air quality.

"With sustained field-level efforts and quantified policy initiatives in the short, medium and long term, Delhi's air quality is expected to show further gradual but marked improvement year on year," officials said.

While experts caution that winter pollution spikes remain a concern, the 2025 data suggest that structural measures are beginning to deliver measurable results for the national capital's air quality.

- IANS

Share this article:

Reader Comments

P
Priya S
While the numbers look good, we must not forget the December AQI of 351. That's still hazardous! One bad month can undo a lot of the annual gains for vulnerable people. The government needs to double down on winter-specific measures, especially around stubble burning and construction dust.
R
Rohit P
Finally some positive data! The shift to CNG in public transport, stricter norms for industries, and even the push for electric vehicles are showing results. It's a collective effort. We citizens also need to do our bit - use metros more, avoid burning waste. Every small step counts.
S
Sarah B
As an expat living in Delhi, this is the best news I've read all week. My kids' school still has to cancel outdoor activities for weeks every winter. PM2.5 at 96 is still way above WHO guidelines, but going down from 104 is progress. Hope the authorities keep the momentum.
V
Vikram M
The data is promising, but let's be real. An average AQI of 201 is still 'Poor'. We are celebrating moving from 'Very Poor' to 'Poor'. The benchmark shouldn't be our own terrible past, but global safe standards. The fight is far from over. We need more aggressive green cover and waste management policies.
K
Kavya N
My asthma has been slightly better this past year, and now I know why! Seeing 79 good/satisfactory days is a big deal. Kudos to all the frontline workers and agencies implementing these policies. The real test will be sustaining this when economic activity increases further.

We welcome thoughtful discussions from our readers. Please keep comments respectful and on-topic.

Leave a Comment

Minimum 50 characters 0/50