Air Quality
Severe
Healthy people will experience reduced endurance in activities and may also show noticeably strong symptoms. Other illnesses may be triggered in healthy people. Elders and the sick should remain indoors and avoid exercise. Healthy individuals should avoid outdoor activities.
PM2.5
PM10
O3
CO
SO2
NO2
Healthy people will experience reduced endurance in activities and may also show noticeably strong symptoms. Other illnesses may be triggered in healthy people. Elders and the sick should remain indoors and avoid exercise. Healthy individuals should avoid outdoor activities.
Advise
Children, seniors and the sick should stay indoors and avoid physical exertion. General population should avoid outdoor activities.
Air Quality
Today
22 Feb
Mon
23 Feb
Tue
24 Feb
Wed
25 Feb
Thu
26 Feb
Fri
27 Feb
Sat
28 Feb
Yan'an Air quality rank
Real-time AQI (Monitoring Station in Yan'an)
延大医附院
312124
PM2.5
429 *
PM10
74
O3
0.9
CO
1
SO2
12
NO2
百米大道
310107
PM2.5
428 *
PM10
73
O3
0.6
CO
3
SO2
8
NO2
志丹路
353117
PM2.5
462 *
PM10
75
O3
0.5
CO
4
SO2
6
NO2
Air quality in the last 12 months (Yan'an)
|
2026/01
|
70
|
51
|
41
|
60
|
51
|
42
|
53
|
56
|
53
|
68
|
59
|
59
|
58
|
79
|
72
|
60
|
77
|
58
|
28
|
28
|
58
|
65
|
68
|
70
|
222
|
209
|
103
|
110
|
104
|
83
|
84
|
|
2025/12
|
73
|
41
|
50
|
57
|
66
|
61
|
60
|
69
|
76
|
75
|
74
|
71
|
108
|
74
|
71
|
68
|
64
|
74
|
62
|
59
|
66
|
72
|
83
|
64
|
50
|
58
|
62
|
60
|
57
|
50
|
48
|
|
2025/11
|
47
|
47
|
57
|
64
|
83
|
80
|
38
|
46
|
95
|
89
|
69
|
52
|
51
|
55
|
59
|
52
|
18
|
32
|
42
|
51
|
53
|
59
|
67
|
109
|
66
|
213
|
205
|
72
|
70
|
81
|
|
|
2025/10
|
42
|
25
|
32
|
24
|
19
|
23
|
20
|
27
|
10
|
10
|
20
|
24
|
28
|
38
|
21
|
36
|
33
|
31
|
41
|
37
|
35
|
32
|
52
|
50
|
33
|
37
|
47
|
48
|
48
|
49
|
48
|
|
2025/09
|
30
|
39
|
14
|
14
|
55
|
29
|
50
|
49
|
48
|
41
|
35
|
19
|
33
|
42
|
49
|
34
|
24
|
23
|
17
|
25
|
21
|
12
|
19
|
27
|
32
|
41
|
29
|
39
|
36
|
41
|
|
|
2025/08
|
35
|
43
|
43
|
32
|
37
|
45
|
43
|
38
|
25
|
26
|
35
|
36
|
33
|
42
|
37
|
25
|
36
|
34
|
37
|
25
|
46
|
33
|
15
|
27
|
31
|
35
|
19
|
19
|
16
|
16
|
24
|
|
2025/07
|
22
|
24
|
21
|
25
|
23
|
30
|
27
|
28
|
36
|
39
|
43
|
45
|
44
|
39
|
48
|
37
|
32
|
44
|
40
|
21
|
27
|
42
|
32
|
27
|
28
|
18
|
27
|
37
|
38
|
33
|
42
|
|
2025/06
|
34
|
32
|
27
|
28
|
38
|
41
|
45
|
33
|
51
|
45
|
49
|
50
|
58
|
42
|
47
|
48
|
41
|
38
|
30
|
30
|
29
|
36
|
33
|
44
|
37
|
29
|
29
|
22
|
39
|
22
|
|
|
2025/05
|
75
|
105
|
42
|
91
|
285
|
269
|
146
|
133
|
65
|
48
|
43
|
56
|
67
|
75
|
61
|
136
|
156
|
73
|
63
|
58
|
60
|
183
|
65
|
63
|
45
|
25
|
37
|
47
|
52
|
53
|
24
|
|
2025/04
|
58
|
59
|
85
|
107
|
62
|
81
|
98
|
119
|
112
|
59
|
172
|
207
|
140
|
49
|
47
|
123
|
104
|
81
|
77
|
74
|
224
|
158
|
68
|
48
|
61
|
56
|
41
|
38
|
64
|
137
|
|
|
2025/03
|
84
|
67
|
30
|
36
|
46
|
53
|
71
|
78
|
65
|
66
|
268
|
164
|
74
|
52
|
49
|
31
|
41
|
41
|
37
|
44
|
56
|
65
|
128
|
325
|
223
|
304
|
187
|
181
|
44
|
48
|
51
|
|
2025/02
|
63
|
50
|
41
|
56
|
38
|
121
|
48
|
33
|
51
|
62
|
78
|
67
|
63
|
63
|
62
|
72
|
66
|
70
|
63
|
57
|
65
|
41
|
39
|
47
|
60
|
65
|
62
|
62
|
|||
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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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
*: primary pollution