The monthly average AQI of Delhi for October in 2026 is recorded as 166, against the monthly average AQI for October as 223 in 2025, 234 in 2024, 219 in 2023, 210 in 2022, 173 in 2021, 265 in 2020, 234 in 2019 and 269 in 2018, respectively.
The average AQI of Delhi for the period 01-Jan to 31-Oct is recorded as 167, against the average AQI of 170 in 2025, 184 in 2024, 172 in 2023, 187 in 2022, 179 in 2021, 156 in 2020, 192 in 2019 and 201 in 2018, respectively.
The average PM2.5 concentrations for period 01-Jan to 29-Oct is recorded as 69 µg/m³, against the average concentration of 72 µg/m³ in 2025, 83 µg/m³ in 2024, 76 µg/m³ in 2023, 81 µg/m³ in 2022, 82 µg/m³ in 2021, 71 µg/m³ in 2020, 88 µg/m³ in 2019 and 93 µg/m³ in 2018, during the same period respectively.
The average PM10 concentrations for period 01-Jan to 29-Oct is recorded as 171 µg/m³, against the average concentration of 166 µg/m³ in 2025, 186 µg/m³ in 2024, 174 µg/m³ in 2023, 191 µg/m³ in 2022, 182 µg/m³ in 2021, 147 µg/m³ in 2020, 197 µg/m³ in 2019 and 216 µg/m³ in 2018, during the same period respectively.
The period (January – October) in 2026 witnessed 220 'Good to Moderate' category days (daily average AQI less than 200), against the number of such days being 200 in 2025, 201 in 2024, 206 in 2023, 160 in 2022, 197 in 2021, 224 in 2020, 175 in 2019 and 157 in 2018, respectively.
The period (January – October) in 2026 witnessed 84 ‘Poor to Severe+’ category days (daily average AQI more than 200), against the number of such days being 104 in 2025, 104 in 2024, 98 in 2023, 144 in 2022, 107 in 2021, 81 in 2020, 129 in 2019 and 147 in 2018, respectively.
CAQM is working closely with various stakeholders concerned to take effective measures for prevention, control and abatement of air pollution and to improve the air quality in Delhi-NCR. These efforts would be intensified with an endeavour to further improve upon the air quality scenario in Delhi-NCR in the coming days.