In 2025, Delhi recorded its best air quality in eight years, according to Environment Minister Manjinder Singh Sirsa, citing data showing real progress in the capital’s air quality over the last year. On January 1, Sirsa attributed this improvement to a science-based strategy adopted by the new government to achieve cleaner air; however, pollution remains a significant concern for residents and experts who study it.

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Cleaner Air Days and Improved AQI Figures

The Environment Ministry said that Delhi had almost 200 days in 2025 when the Air Quality Index (AQI) stayed below 200, which is labeled moderate or better; of these, 79 were even better, falling into the good and satisfactory categories. From January to November, the average AQI was 187, the best it’s been in eight years, excluding the special situation in 2020 during the COVID-19 lockdown. The number of days with severe pollution (AQI over 400) dropped to just eight, the lowest in recent years.

The amount of particle pollution also decreased compared to the year before, as average PM2.5 levels decreased from 104 micrograms per cubic meter in 2024 to 96 in 2025, and PM10 levels decreased from 212 to 197. These numbers show that air quality is improving little by little, even though Delhi is still struggling with pollution.

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Science-Led Action and Policy Measures

Sirsa made it clear that using scientific methods was crucial to these improvements, saying the results show that “science-based action works wonders.” Government officials said their plan targeted the primary sources of pollution simultaneously, including vehicle emissions, dust, industrial pollution, and waste management.

The government said they have been using more machines to sweep roads and putting anti-smog guns and mist sprayers to use. They are also keeping a closer eye on construction sites, conducting checks to ensure they follow the rules, and punishing those who break them.

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Looking Ahead to Sustaining Gains

Some new attempts included cloud seeding trials and challenges posed by new pollution-reducing technologies. Sirsa said that maintaining the improvements made in 2025 and continuing to grow them will be a primary goal for 2026, applying the Graded Response Action Plan (GRAP) more strictly, testing more technology ideas, and encouraging more people to join in to help keep up the progress.

Delhi recorded its best air quality in eight years, yet experts warn that it is still not up to national and international health standards. Officials see the report as a key point in the fight against air pollution.

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