Cheonggye Dong, Osan, Gyeonggi, 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
Cheonggye Dong, Osan, Gyeonggi, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (18th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 40 of Good air quality, showing improvement over 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Sep - 19th Sep 2025
Cheonggye Dong, Osan, Gyeonggi, South Korea
6 AM18th Sep 2025
6 PM
5 AM19th Sep 2025
AQI
AQI
46AQI
15AQI
In the last 24 hours,
Cheonggye Dong's AQI reached its highest point of 46 at 2 AM during the Night, while the lowest point, 15, was recorded at 12 PM during the Night between 18th Sep and 19th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Cheonggye Dong, Osan, Gyeonggi, South Korea
27°C23/32°C
28°C25/33°C
28°C25/32°C
28°C24/33°C
29°C25/33°C
29°C25/34°C
26°C24/30°C
26°C22/32°C
27°C24/31°C
27°C24/32°C
27°C24/32°C
27°C23/33°C
25°C22/28°C
25°C22/30°C
26°C22/31°C
24°C22/28°C
27°C22/32°C
27°C24/31°C
25°C23/29°C
24°C21/29°C
24°C21/28°C
25°C21/31°C
26°C21/31°C
23°C20/27°C
22°C20/25°C
24°C21/28°C
25°C21/30°C
24°C22/28°C
22°C20/25°C
--°C/°C
--°C/°C
47AQI
42AQI
47AQI
45AQI
2025 Days Vs Air Quality
Cheonggye Dong, Osan, Gyeonggi, South Korea
33%
87
61%
160
5%
14
Total number of days with different AQI categories in last 261 days in 2025 (104 days remaining)
Under WHO’s Safe Air Quality Limits: 33%
Health Risk Level:
High
In 2025, 33% of 261 days were within WHO’s safe air quality limits. The risk of health issues is High, with respiratory problems, heart disease, skin issues, and stress being more common, particularly among children and the elderly.
Annual Air Quality Insights
Cheonggye Dong, Osan, Gyeonggi, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
74AQI
62AQI
62AQI
63AQI
70AQI
100AQI
57AQI
70AQI
41AQI
56AQI
54AQI
77AQI
83AQI
98AQI
53AQI
73AQI
83AQI
76AQI
82AQI
126AQI
142AQI
144AQI
130AQI
99AQI
69AQI
53AQI
65AQI
54AQI
58AQI
50AQI
71AQI
69AQI
78AQI
52AQI
49AQI
41AQI
54AQI
46AQI
43AQI
46AQI
55AQI
66AQI
74AQI
48AQI
88AQI
56AQI
108AQI
49AQI
61AQI
45AQI
57AQI
53AQI
55AQI
53AQI
58AQI
53AQI
71AQI
53AQI
77AQI
92AQI
71AQI
56AQI
47AQI
37AQI
72AQI
91AQI
86AQI
104AQI
110AQI
106AQI
104AQI
94AQI
79AQI
53AQI
75AQI
62AQI
68AQI
80AQI
86AQI
102AQI
102AQI
109AQI
113AQI
132AQI
91AQI
94AQI
62AQI
50AQI
45AQI
60AQI
76AQI
82AQI
80AQI
83AQI
73AQI
70AQI
70AQI
77AQI
68AQI
76AQI
84AQI
62AQI
63AQI
44AQI
57AQI
60AQI
66AQI
84AQI
54AQI
63AQI
52AQI
47AQI
34AQI
63AQI
60AQI
52AQI
40AQI
59AQI
66AQI
56AQI
59AQI
50AQI
48AQI
48AQI
53AQI
40AQI
55AQI
64AQI
50AQI
59AQI
70AQI
69AQI
71AQI
73AQI
63AQI
52AQI
46AQI
58AQI
60AQI
41AQI
51AQI
46AQI
63AQI
44AQI
51AQI
61AQI
80AQI
83AQI
80AQI
69AQI
79AQI
83AQI
99AQI
80AQI
59AQI
58AQI
58AQI
69AQI
59AQI
66AQI
56AQI
49AQI
60AQI
75AQI
53AQI
54AQI
65AQI
62AQI
68AQI
63AQI
44AQI
59AQI
70AQI
69AQI
61AQI
46AQI
58AQI
66AQI
63AQI
46AQI
42AQI
46AQI
43AQI
53AQI
51AQI
49AQI
53AQI
67AQI
67AQI
56AQI
49AQI
48AQI
46AQI
62AQI
55AQI
44AQI
52AQI
37AQI
41AQI
32AQI
37AQI
39AQI
39AQI
47AQI
55AQI
58AQI
45AQI
39AQI
62AQI
68AQI
58AQI
57AQI
58AQI
62AQI
61AQI
48AQI
50AQI
45AQI
50AQI
56AQI
54AQI
52AQI
56AQI
46AQI
39AQI
40AQI
38AQI
38AQI
41AQI
50AQI
41AQI
45AQI
46AQI
46AQI
49AQI
51AQI
49AQI
43AQI
49AQI
52AQI
46AQI
44AQI
50AQI
40AQI
48AQI
49AQI
38AQI
39AQI
38AQI
41AQI
48AQI
52AQI
49AQI
48AQI
45AQI
37AQI
43AQI
48AQI
45AQI
37AQI
40AQI
77AQI
59AQI
82AQI
64AQI
59AQI
62AQI
50AQI
48AQI
44AQI
No. of days
202561AQI
Highest AQI recorded in
March82AQI
Lowest AQI recorded in
September44AQI
202462AQI
Highest AQI recorded in
April76AQI
Lowest AQI recorded in
September46AQI
202367AQI
Highest AQI recorded in
March91AQI
Lowest AQI recorded in
September46AQI
202269AQI
Highest AQI recorded in
January85AQI
Lowest AQI recorded in
August22AQI
202164AQI
Highest AQI recorded in
March92AQI
Lowest AQI recorded in
September35AQI
202063AQI
Highest AQI recorded in
June85AQI
Lowest AQI recorded in
September42AQI
Most & Least Polluted Years Over the Last 6 Years
Cheonggye Dong's annual 2025 AQI (61) shows an average percentage change of -5.9% (improved AQI) compared to previous years: 2020 (63), 2021 (64), 2022 (69), 2023 (67), 2024 (62).