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Polynomial regression for Bmax of all criteria with level VI.
| Indices | Polynomial Regression | Bmax of Level VI |
|---|---|---|
| PM2.5 | f(x) = 8.21x2 + 1.21x + 31 | 333.99 |
| PM10 | f(x) = −4.29x2 + 119.7x − 68 | 495.91 |
| O3 | f(x) = 54.64x2 − 159.4x + 167 | 1177.6 |
| CO | f(x) = 1.43x2 + 0.23x − 0.4 | 52.42 |
| NO2 | f(x) = 35x2 − 85x + 99 | 849 |
| SO2 | f(x) = 41.07x2 − 63.93x + 85 | 1179.94 |
