湖南省2015年7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86.7%~100%之间,平均达标天数比例为96.0%;平均超标天数比例为4.0%,其中轻度污染占3.6%,中度污染占0.4%,无重度及以上污染天气。影响城市环境空气质量的主要污染物是细颗粒物(PM2.5)。详见表1。
表1 2015年7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 |
10 |
18 |
3 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
2 |
90.3 |
28 |
31 |
29 |
31 |
93.5 | ||||
株洲 |
18 |
12 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
96.8 |
30 |
31 |
30 |
31 |
96.8 | ||||
湘潭 |
12 |
16 |
1 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3 |
90.3 |
28 |
31 |
28 |
31 |
90.3 | ||||
岳阳 |
3 |
25 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
0 |
93.3 |
28 |
30 |
30 |
30 |
100 | ||||
常德 |
8 |
21 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2 |
0 |
93.5 |
29 |
31 |
31 |
31 |
100 | ||||
张家界 |
14 |
15 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
96.7 |
29 |
30 |
30 |
31 |
96.8 | ||||
衡阳 |
15 |
16 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
100 |
31 |
31 |
31 |
31 |
100 | ||||
邵阳 |
13 |
17 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
100 |
30 |
30 |
31 |
31 |
100 | ||||
益阳 |
5 |
18 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
95.8 |
23 |
24 |
29 |
30 |
96.7 | ||||
郴州 |
13 |
18 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
100 |
31 |
31 |
31 |
31 |
100 | ||||
永州 |
3 |
23 |
4 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
4 |
86.7 |
26 |
30 |
27 |
31 |
87.1 | ||||
怀化 |
10 |
21 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
100 |
31 |
31 |
31 |
31 |
100 | ||||
娄底 |
11 |
16 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
100 |
27 |
27 |
31 |
31 |
100 | ||||
吉首 |
17 |
14 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
100 |
31 |
31 |
31 |
31 |
100 | ||||
合计 |
152 |
250 |
15 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
5 |
12 |
96.0 |
402 |
419 |
420 |
432 |
97.2 |