| 0~50 mg∙m−3 | 50~100 mg∙m−3 | ≥100 mg∙m−3 | 合计 |
春 | 28.5 | 2.2 | 0.6 | 31.3 |
夏 | 29.1 | 2.4 | 0.3 | 31.8 |
秋 | 19.9 | 1.4 | 0.4 | 21.7 |
冬 | 14.9 | 0.5 |
| 15.4 |
合计 | 92.4 | 6.5 | 1.3 | 100 |