Changan, Xichang, Sichuan, China Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Changan, Xichang, Sichuan, China
AQI Trends: Highest and Lowest
Same Day Analysis (17th September ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 1st highest AQI at 55 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Changan, Xichang, Sichuan, China
5 AM17th Sep 2025
6 PM
4 AM18th Sep 2025
AQI
AQI
62AQI
40AQI
In the last 24 hours,
Changan's AQI reached its highest point of 62 at 12 PM during the Night, while the lowest point, 40, was recorded at 6 PM during the Night between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Changan, Xichang, Sichuan, China
17°C11/26°C
17°C10/27°C
17°C13/23°C
17°C12/26°C
16°C12/22°C
18°C12/24°C
18°C12/23°C
18°C11/27°C
18°C11/27°C
18°C11/27°C
16°C11/20°C
17°C12/25°C
18°C12/24°C
17°C10/26°C
18°C11/28°C
19°C14/28°C
19°C12/27°C
19°C13/28°C
19°C14/26°C
18°C13/27°C
17°C14/22°C
17°C10/26°C
18°C12/25°C
19°C13/25°C
18°C12/20°C
18°C11/27°C
17°C11/27°C
17°C11/27°C
18°C10/26°C
--°C/°C
--°C/°C
58AQI
48AQI
58AQI
53AQI
2025 Days Vs Air Quality
Changan, Xichang, Sichuan, China
5%
12
88%
229
7%
19
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Under WHO’s Safe Air Quality Limits: 5%
Health Risk Level:
Extreme
In 2025, 5% of 260 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.
Annual Air Quality Insights
Changan, Xichang, Sichuan, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
104AQI
95AQI
110AQI
110AQI
101AQI
113AQI
91AQI
94AQI
95AQI
88AQI
80AQI
95AQI
97AQI
89AQI
99AQI
100AQI
106AQI
93AQI
97AQI
95AQI
114AQI
118AQI
131AQI
114AQI
93AQI
85AQI
86AQI
98AQI
110AQI
115AQI
95AQI
100AQI
91AQI
78AQI
95AQI
95AQI
92AQI
86AQI
87AQI
83AQI
80AQI
83AQI
79AQI
79AQI
67AQI
66AQI
69AQI
66AQI
63AQI
58AQI
64AQI
61AQI
57AQI
58AQI
60AQI
59AQI
64AQI
67AQI
65AQI
63AQI
69AQI
63AQI
66AQI
58AQI
59AQI
62AQI
65AQI
68AQI
73AQI
70AQI
78AQI
84AQI
86AQI
78AQI
79AQI
74AQI
66AQI
74AQI
83AQI
100AQI
100AQI
91AQI
91AQI
91AQI
94AQI
92AQI
115AQI
116AQI
119AQI
103AQI
97AQI
98AQI
104AQI
105AQI
100AQI
105AQI
91AQI
97AQI
99AQI
91AQI
89AQI
90AQI
76AQI
78AQI
78AQI
76AQI
77AQI
77AQI
68AQI
71AQI
67AQI
70AQI
77AQI
72AQI
78AQI
77AQI
77AQI
77AQI
74AQI
66AQI
74AQI
70AQI
70AQI
72AQI
68AQI
65AQI
65AQI
64AQI
74AQI
75AQI
74AQI
74AQI
82AQI
79AQI
79AQI
76AQI
73AQI
77AQI
75AQI
71AQI
68AQI
66AQI
71AQI
72AQI
72AQI
74AQI
65AQI
63AQI
60AQI
58AQI
53AQI
55AQI
54AQI
59AQI
65AQI
64AQI
68AQI
68AQI
62AQI
63AQI
66AQI
68AQI
72AQI
75AQI
76AQI
70AQI
67AQI
64AQI
61AQI
58AQI
57AQI
54AQI
49AQI
52AQI
50AQI
51AQI
53AQI
55AQI
51AQI
55AQI
52AQI
54AQI
50AQI
53AQI
48AQI
50AQI
51AQI
53AQI
55AQI
54AQI
54AQI
56AQI
56AQI
59AQI
61AQI
59AQI
59AQI
59AQI
60AQI
57AQI
58AQI
55AQI
55AQI
53AQI
52AQI
55AQI
56AQI
56AQI
51AQI
59AQI
58AQI
56AQI
58AQI
60AQI
58AQI
57AQI
56AQI
59AQI
60AQI
55AQI
57AQI
57AQI
55AQI
51AQI
51AQI
54AQI
55AQI
52AQI
54AQI
54AQI
54AQI
54AQI
51AQI
46AQI
45AQI
46AQI
49AQI
51AQI
50AQI
50AQI
50AQI
51AQI
54AQI
54AQI
54AQI
55AQI
57AQI
61AQI
57AQI
59AQI
59AQI
56AQI
61AQI
55AQI
55AQI
55AQI
58AQI
59AQI
54AQI
55AQI
100AQI
74AQI
82AQI
83AQI
70AQI
60AQI
55AQI
53AQI
57AQI
No. of days
202571AQI
Highest AQI recorded in
January100AQI
Lowest AQI recorded in
August53AQI
202452AQI
Highest AQI recorded in
December91AQI
Lowest AQI recorded in
April4AQI
20236AQI
Highest AQI recorded in
November8AQI
Lowest AQI recorded in
December6AQI
202284AQI
Highest AQI recorded in
January125AQI
Lowest AQI recorded in
May38AQI
202173AQI
Highest AQI recorded in
January109AQI
Lowest AQI recorded in
July52AQI
202071AQI
Highest AQI recorded in
December131AQI
Lowest AQI recorded in
September53AQI
Most & Least Polluted Years Over the Last 6 Years
Changan's annual 2025 AQI (71) shows an average percentage change of 209.8% (worsened AQI) compared to previous years: 2020 (71), 2021 (73), 2022 (84), 2023 (6), 2024 (52).