Sa Chon, Gyeongnam, South Korea 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
Sa Chon, Gyeongnam, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (20th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 31 of Good air quality, showing improvement over 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025
Sa Chon, Gyeongnam, South Korea
6 AM21st Sep 2025
6 PM
5 AM22nd Sep 2025
AQI
AQI
34AQI
16AQI
In the last 24 hours,
Sa Chon's AQI reached its highest point of 34 at 4 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 21st Sep and 22nd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Sa Chon, Gyeongnam, South Korea
27°C20/36°C
27°C21/35°C
27°C21/35°C
26°C21/32°C
25°C19/33°C
25°C19/32°C
26°C20/35°C
27°C20/36°C
25°C21/32°C
26°C20/33°C
26°C23/33°C
25°C21/32°C
24°C20/30°C
24°C19/31°C
25°C20/32°C
25°C23/29°C
24°C20/30°C
19°C17/22°C
22°C19/26°C
22°C18/27°C
21°C18/25°C
24°C18/30°C
23°C19/30°C
25°C21/31°C
25°C19/31°C
24°C20/31°C
21°C16/24°C
19°C16/23°C
20°C16/26°C
--°C/°C
--°C/°C
43AQI
39AQI
43AQI
40AQI
2025 Days Vs Air Quality
Sa Chon, Gyeongnam, South Korea
46%
122
52%
137
2%
4
Total number of days with different AQI categories in last 264 days in 2025 (101 days remaining)
Under WHO’s Safe Air Quality Limits: 46%
Health Risk Level:
Significant
In 2025, 46% of 264 days were within WHO’s safe air quality limits, and 54% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.
Annual Air Quality Insights
Sa Chon, Gyeongnam, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
52AQI
64AQI
48AQI
52AQI
60AQI
79AQI
43AQI
54AQI
35AQI
45AQI
44AQI
58AQI
69AQI
82AQI
49AQI
62AQI
68AQI
77AQI
74AQI
94AQI
109AQI
116AQI
108AQI
91AQI
68AQI
54AQI
59AQI
40AQI
43AQI
49AQI
57AQI
52AQI
57AQI
48AQI
41AQI
41AQI
38AQI
43AQI
32AQI
38AQI
43AQI
56AQI
61AQI
42AQI
64AQI
48AQI
79AQI
44AQI
48AQI
39AQI
44AQI
39AQI
45AQI
43AQI
44AQI
46AQI
68AQI
60AQI
62AQI
78AQI
75AQI
48AQI
44AQI
35AQI
43AQI
53AQI
54AQI
64AQI
64AQI
71AQI
66AQI
58AQI
57AQI
39AQI
50AQI
54AQI
59AQI
72AQI
72AQI
73AQI
77AQI
88AQI
83AQI
114AQI
75AQI
85AQI
71AQI
51AQI
46AQI
60AQI
61AQI
58AQI
58AQI
60AQI
56AQI
54AQI
55AQI
63AQI
71AQI
71AQI
69AQI
64AQI
57AQI
53AQI
43AQI
55AQI
60AQI
68AQI
52AQI
58AQI
53AQI
41AQI
40AQI
58AQI
59AQI
50AQI
52AQI
48AQI
61AQI
57AQI
49AQI
44AQI
49AQI
43AQI
47AQI
48AQI
51AQI
54AQI
42AQI
35AQI
55AQI
56AQI
70AQI
68AQI
62AQI
55AQI
57AQI
56AQI
58AQI
50AQI
40AQI
61AQI
54AQI
43AQI
37AQI
55AQI
65AQI
72AQI
68AQI
61AQI
60AQI
69AQI
77AQI
66AQI
46AQI
50AQI
59AQI
56AQI
66AQI
63AQI
66AQI
47AQI
60AQI
62AQI
44AQI
54AQI
53AQI
54AQI
63AQI
58AQI
43AQI
40AQI
29AQI
44AQI
48AQI
44AQI
57AQI
63AQI
60AQI
56AQI
48AQI
50AQI
54AQI
62AQI
60AQI
51AQI
51AQI
62AQI
63AQI
54AQI
54AQI
53AQI
55AQI
57AQI
50AQI
45AQI
53AQI
44AQI
41AQI
36AQI
43AQI
39AQI
49AQI
57AQI
62AQI
50AQI
42AQI
40AQI
42AQI
45AQI
46AQI
51AQI
52AQI
59AQI
59AQI
54AQI
51AQI
50AQI
48AQI
50AQI
51AQI
41AQI
47AQI
41AQI
39AQI
38AQI
40AQI
41AQI
41AQI
50AQI
50AQI
48AQI
48AQI
51AQI
50AQI
50AQI
46AQI
42AQI
48AQI
50AQI
46AQI
44AQI
46AQI
37AQI
42AQI
46AQI
45AQI
37AQI
37AQI
39AQI
44AQI
37AQI
37AQI
40AQI
38AQI
35AQI
36AQI
44AQI
46AQI
35AQI
32AQI
32AQI
31AQI
65AQI
49AQI
64AQI
57AQI
54AQI
55AQI
50AQI
47AQI
39AQI
No. of days
202554AQI
Highest AQI recorded in
January65AQI
Lowest AQI recorded in
September39AQI
202453AQI
Highest AQI recorded in
April69AQI
Lowest AQI recorded in
July37AQI
202360AQI
Highest AQI recorded in
February71AQI
Lowest AQI recorded in
September47AQI
202258AQI
Highest AQI recorded in
November72AQI
Lowest AQI recorded in
August22AQI
202156AQI
Highest AQI recorded in
February67AQI
Lowest AQI recorded in
September39AQI
202054AQI
Highest AQI recorded in
December65AQI
Lowest AQI recorded in
July42AQI
Most & Least Polluted Years Over the Last 6 Years
Sa Chon's annual 2025 AQI (54) shows an average percentage change of -3.8% (improved AQI) compared to previous years: 2020 (54), 2021 (56), 2022 (58), 2023 (60), 2024 (53).