Delhi's Air Quality Index Hits Eight-Year Low in October

Delhi's average air quality index in October was 166, the lowest in eight years, India's Press Information Bureau (PIB) said on Sunday.

The average PM 2.5 concentration from January 1 to October 29 was 69 micro gm, compared to 72 micro gm; in 2025, 83 micro gm; in 2024, 76 micro gm; in 2023, 81 micro gm; in 2022, 82 micro gm; in 2021, 71 micro gm; in 2020, 88 micro gm; in 2019, and 93 micro gm; in 2018, according to the PIB.

The average PM 10 concentration during the same period was 171 micro g/m, compared to 166 micro g/m; in 2025, 186 micro g/m; in 2024, 174 micro g/m; in 2023, 191 micro g/m; in 2022, 182 micro g/m; in 2021, 147 micro g/m; in 2020, 197 micro g/m; in 2019, and 216 micro g/m; in 2018, the PIB said.

Background

Delhi's air quality is a major concern due to its geographical location and high population density.

The city's air quality is often among the worst in the world, with high levels of particulate matter, nitrogen dioxide, and other pollutants.

Health Impacts

Prolonged exposure to poor air quality can cause serious health problems, including respiratory issues, cardiovascular disease, and even premature death.

The Indian government has implemented various measures to improve air quality, including restrictions on vehicle emissions and industrial pollution.