湖南省2015年9月城市环境空气质量月报
湖南省环境质量月报统计结果表明:按GB 3095-2012和HJ 663-2013评价,本月,我省14个城市环境空气质量达标天数比例范围在55.2%~100%,平均达标天数比例为84.4%;平均超标天数比例为15.6%,超标天均为轻度污染。影响城市环境空气质量的主要污染物是细颗粒物和臭氧。详见表1。
表1 2015年9月14个城市空气质量状况统计表
城市 |
空气质量类别分布(天数) |
污染天数中首要污染物 分布(天数) |
优良 率% |
达标 天数 |
有效天数 |
PM2.5 达标天数 |
PM2.5 有效天数 |
PM2.5 达标天数比例 % |
| ||||||||||||||||
优 |
良 |
轻度污染 |
中度污染 |
重度污染 |
严重污染 |
SO2 |
NO2 |
PM10 |
CO |
O3 |
PM2.5 |
本月 |
| ||||||||||||
长沙 |
5 |
15 |
10 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
9 |
1 |
66.7 |
20 |
30 |
28 |
30 |
93.3 | |||||||
株洲 |
6 |
21 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
100 |
27 |
27 |
30 |
30 |
100 | |||||||
湘潭 |
7 |
16 |
7 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
6 |
1 |
76.7 |
23 |
30 |
28 |
30 |
93.3 | |||||||
岳阳 |
4 |
12 |
13 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
13 |
0 |
55.2 |
16 |
29 |
30 |
30 |
100 | |||||||
常德 |
5 |
15 |
7 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
7 |
0 |
74.1 |
20 |
27 |
30 |
30 |
100 | |||||||
张家界 |
4 |
25 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
100 |
29 |
29 |
29 |
29 |
100 | |||||||
衡阳 |
6 |
23 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
96.7 |
29 |
30 |
30 |
30 |
100 | |||||||
邵阳 |
6 |
21 |
3 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3 |
90.0 |
27 |
30 |
27 |
30 |
90.0 | |||||||
益阳 |
4 |
16 |
6 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
6 |
0 |
76.9 |
20 |
26 |
29 |
29 |
100 | |||||||
郴州 |
7 |
16 |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3 |
2 |
82.1 |
23 |
28 |
28 |
30 |
93.3 | |||||||
永州 |
8 |
15 |
6 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
4 |
79.3 |
23 |
29 |
26 |
30 |
86.7 | |||||||
怀化 |
6 |
22 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
93.3 |
28 |
30 |
28 |
30 |
93.3 | |||||||
娄底 |
7 |
22 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
96.7 |
29 |
30 |
29 |
30 |
96.7 | |||||||
吉首 |
9 |
19 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
93.3 |
28 |
30 |
28 |
30 |
93.3 | |||||||
合计 |
84 |
258 |
63 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
47 |
16 |
84.4 |
342 |
405 |
28 |
30 |
93.3 | |||||||