TABLE 1.
Average Concentration of Various Pollutants and AQI in Delhi
| Jan | Feb | March | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Average Pollutant Concentration | 2018 | 2019 | 2020 | 2018 | 2019 | 2020 | 2018 | 2019 | 2020 |
| PM 2.5 | 261.64 | 235.87 | 182.49 | 161.27 | 142.47 | 124.17 | 125.57 | 106.83 | 67.92 |
| CO | 3.10 | 3.17 | 2.51 | 2.78 | 1.89 | 2.11 | 1.83 | 2.04 | 1.85 |
| NO 2 | 130.62 | 110.84 | 60.45 | 177.34 | 93.07 | 71.46 | 126.77 | 81.56 | 46.04 |
| Ozone | 24.22 | 20.04 | 42.54 | 20.09 | 24.74 | 25.70 | 30.25 | 18.85 | 36.65 |
| SO 2 | 22.24 | 11.17 | 9.66 | 17.02 | 17.20 | 7.96 | 20.76 | 19.16 | 10.34 |
| AQI | 412.27 | 377.75 | 330.19 | 310.13 | 281.54 | 264.11 | 265.45 | 222.05 | 144.13 |
| PM 10 | 429.40 | 375.04 | 299.78 | 348.30 | 284.51 | 266.33 | 319.65 | 258.51 | 165.11 |
| Toluene | 17.05 | 11.37 | 78.04 | 8.73 | 6.85 | 13.43 | 13.93 | 4.14 | 14.85 |
| Benzene | 6.74 | 50.92 | 3.81 | 9.86 | 47.34 | 3.24 | 17.72 | 28.34 | 2.74 |
| NH 3 | 80.83 | 68.66 | 38.90 | 38.69 | 40.74 | 35.84 | 35.90 | 38.06 | 26.14 |