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Delhi records October's lowest average AQI at 166 in last 8 years, 220 days in 'Good to Moderate' category

The national capital has recorded it's lowest average Air Quality Index (AQI) of 166 in October, its lowest for the month in the last eight years. The monthly average AQI stood at 223 in October 2025, 234 in 2024, 219 in 2023, 210 in 2022, 173 in 2021, 265 in 2020, 234 in 2019 and 269 in 2018, the Union Environment Ministry said on Saturday. The Delhi's average AQI for the January-October period this year stood at 167, compared to 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, the ministry said in a statement.