Air Quality
Excellent
No health implications.
11
PM2.5
19
PM10
30
O3
0.9
CO
9
SO2
16
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 May
51
Good
Mon
18 May
48
Excellent
Tue
19 May
64
Good
Wed
20 May
83
Good
Thu
21 May
86
Good
Fri
22 May
64
Good
Sat
23 May
45
Excellent
Air quality in the last 12 months (Hechuan)
|
2026/04
|
35
|
39
|
33
|
48
|
60
|
52
|
38
|
32
|
31
|
46
|
33
|
33
|
40
|
32
|
25
|
33
|
44
|
50
|
65
|
76
|
25
|
19
|
31
|
45
|
57
|
66
|
40
|
22
|
22
|
31
|
|
|
2026/03
|
28
|
34
|
38
|
33
|
55
|
51
|
38
|
36
|
37
|
32
|
54
|
51
|
56
|
35
|
21
|
23
|
21
|
21
|
32
|
34
|
43
|
45
|
40
|
26
|
36
|
31
|
47
|
37
|
43
|
25
|
24
|
|
2026/02
|
66
|
115
|
133
|
110
|
138
|
141
|
126
|
60
|
60
|
73
|
90
|
104
|
106
|
107
|
103
|
66
|
115
|
103
|
114
|
96
|
101
|
110
|
122
|
39
|
68
|
53
|
54
|
23
|
|||
|
2026/01
|
31
|
27
|
43
|
54
|
68
|
68
|
85
|
102
|
136
|
165
|
204
|
207
|
154
|
179
|
176
|
217
|
197
|
225
|
99
|
19
|
30
|
57
|
67
|
69
|
83
|
84
|
73
|
142
|
119
|
30
|
44
|
|
2025/12
|
149
|
173
|
95
|
64
|
77
|
77
|
88
|
96
|
139
|
131
|
102
|
95
|
39
|
58
|
76
|
106
|
135
|
148
|
140
|
74
|
33
|
39
|
29
|
41
|
42
|
40
|
70
|
81
|
103
|
112
|
68
|
|
2025/11
|
44
|
50
|
59
|
44
|
55
|
38
|
21
|
22
|
23
|
20
|
31
|
42
|
50
|
57
|
30
|
46
|
24
|
21
|
45
|
60
|
76
|
99
|
72
|
72
|
72
|
77
|
102
|
104
|
107
|
130
|
|
|
2025/10
|
38
|
20
|
22
|
19
|
22
|
27
|
41
|
37
|
32
|
54
|
51
|
27
|
17
|
27
|
31
|
32
|
22
|
23
|
16
|
13
|
16
|
23
|
26
|
34
|
30
|
33
|
35
|
49
|
55
|
36
|
46
|
|
2025/09
|
71
|
80
|
49
|
59
|
57
|
20
|
33
|
20
|
32
|
40
|
37
|
22
|
17
|
32
|
42
|
38
|
31
|
24
|
16
|
29
|
20
|
18
|
17
|
27
|
41
|
37
|
32
|
25
|
12
|
29
|
|
|
2025/08
|
32
|
32
|
32
|
38
|
48
|
44
|
25
|
37
|
32
|
32
|
19
|
24
|
28
|
35
|
35
|
18
|
24
|
40
|
27
|
19
|
25
|
31
|
25
|
27
|
35
|
27
|
21
|
23
|
23
|
46
|
33
|
|
2025/07
|
25
|
14
|
13
|
15
|
20
|
31
|
33
|
16
|
18
|
23
|
25
|
30
|
45
|
39
|
34
|
39
|
43
|
33
|
31
|
28
|
30
|
18
|
16
|
17
|
15
|
19
|
25
|
30
|
39
|
38
|
32
|
|
2025/06
|
27
|
27
|
47
|
56
|
51
|
52
|
46
|
26
|
19
|
42
|
46
|
44
|
45
|
40
|
40
|
39
|
32
|
23
|
15
|
35
|
24
|
20
|
17
|
24
|
16
|
26
|
26
|
28
|
20
|
15
|
|
|
2025/05
|
51
|
74
|
95
|
57
|
42
|
75
|
76
|
39
|
60
|
61
|
54
|
65
|
68
|
90
|
88
|
79
|
77
|
81
|
78
|
65
|
80
|
47
|
58
|
65
|
47
|
41
|
22
|
24
|
28
|
29
|
33
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
- Excellent
- Good
- Lightly
- Moderately
- Heavily
- Severely
Air quality source: CNEMC
*: primary pollution