<0℃ | 0℃~1℃ | 1℃~2℃ | 2℃~3℃ | >3℃ | |
重度污染 | 0 | 7 | 6 | 1 | 0 |
中度污染 | 0 | 9 | 13 | 4 | 10 |
轻度污染 | 29 | 28 | 31 | 32 | 21 |
优或良 | 71 | 56 | 59 | 62 | 69 |