Yesangun, Hongseong, Chungnam, 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
Yesangun, Hongseong, Chungnam, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 56 of Moderate air quality, showing improvement over 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Sep - 30th Sep 2025
Yesangun, Hongseong, Chungnam, South Korea
6 AM29th Sep 2025
6 PM
5 AM30th Sep 2025
67AQI
44AQI
58AQI
38AQI
In the last 24 hours,
Yesangun's AQI reached its highest point of 67 at 12 PM during the Day, while the lowest point, 38, was recorded at 4 AM during the Night between 29th Sep and 30th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Yesangun, Hongseong, Chungnam, South Korea
27°C23/33°C
25°C22/30°C
24°C21/30°C
24°C19/32°C
22°C22/24°C
25°C21/32°C
26°C23/31°C
24°C19/29°C
22°C18/28°C
21°C17/23°C
22°C18/28°C
23°C18/29°C
22°C20/24°C
24°C20/27°C
23°C19/28°C
24°C20/30°C
25°C21/29°C
22°C19/25°C
20°C17/26°C
18°C15/20°C
18°C15/22°C
19°C15/25°C
20°C17/25°C
20°C17/24°C
21°C16/25°C
21°C20/22°C
20°C16/26°C
21°C16/27°C
19°C17/20°C
19°C15/23°C
--°C/°C
46AQI
41AQI
47AQI
43AQI
2025 Days Vs Air Quality
Yesangun, Hongseong, Chungnam, South Korea
36%
98
60%
162
4%
12
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 36%
Health Risk Level:
High
In 2025, 36% of 273 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
Yesangun, Hongseong, Chungnam, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
67AQI
60AQI
54AQI
56AQI
62AQI
79AQI
51AQI
59AQI
37AQI
55AQI
56AQI
74AQI
80AQI
88AQI
51AQI
63AQI
73AQI
70AQI
72AQI
110AQI
124AQI
131AQI
108AQI
117AQI
83AQI
61AQI
64AQI
50AQI
52AQI
56AQI
79AQI
91AQI
98AQI
56AQI
50AQI
42AQI
48AQI
44AQI
40AQI
49AQI
51AQI
70AQI
62AQI
46AQI
75AQI
56AQI
102AQI
49AQI
58AQI
44AQI
51AQI
49AQI
55AQI
49AQI
48AQI
48AQI
76AQI
55AQI
75AQI
103AQI
83AQI
56AQI
48AQI
39AQI
72AQI
77AQI
80AQI
104AQI
100AQI
99AQI
90AQI
90AQI
81AQI
55AQI
71AQI
60AQI
77AQI
78AQI
92AQI
97AQI
108AQI
114AQI
111AQI
130AQI
89AQI
95AQI
58AQI
47AQI
46AQI
61AQI
74AQI
75AQI
83AQI
78AQI
72AQI
65AQI
70AQI
73AQI
65AQI
72AQI
77AQI
63AQI
61AQI
43AQI
57AQI
58AQI
65AQI
81AQI
49AQI
69AQI
53AQI
48AQI
44AQI
61AQI
55AQI
48AQI
38AQI
57AQI
59AQI
54AQI
54AQI
48AQI
49AQI
45AQI
49AQI
47AQI
49AQI
61AQI
46AQI
58AQI
69AQI
68AQI
71AQI
69AQI
55AQI
49AQI
41AQI
58AQI
57AQI
37AQI
49AQI
53AQI
57AQI
50AQI
46AQI
59AQI
71AQI
74AQI
77AQI
80AQI
86AQI
85AQI
100AQI
75AQI
60AQI
54AQI
58AQI
67AQI
60AQI
63AQI
56AQI
52AQI
57AQI
64AQI
53AQI
59AQI
62AQI
62AQI
63AQI
63AQI
52AQI
50AQI
45AQI
52AQI
56AQI
44AQI
51AQI
59AQI
57AQI
49AQI
48AQI
46AQI
47AQI
52AQI
50AQI
48AQI
50AQI
57AQI
61AQI
53AQI
53AQI
54AQI
53AQI
61AQI
59AQI
48AQI
54AQI
43AQI
46AQI
36AQI
43AQI
41AQI
39AQI
48AQI
54AQI
61AQI
54AQI
47AQI
59AQI
64AQI
63AQI
57AQI
57AQI
61AQI
62AQI
54AQI
49AQI
50AQI
50AQI
55AQI
55AQI
55AQI
57AQI
49AQI
41AQI
44AQI
41AQI
40AQI
44AQI
52AQI
47AQI
47AQI
48AQI
47AQI
50AQI
53AQI
49AQI
44AQI
49AQI
52AQI
48AQI
45AQI
47AQI
41AQI
48AQI
51AQI
46AQI
48AQI
42AQI
41AQI
48AQI
51AQI
51AQI
52AQI
47AQI
44AQI
45AQI
48AQI
40AQI
35AQI
43AQI
33AQI
30AQI
29AQI
29AQI
30AQI
28AQI
50AQI
84AQI
65AQI
59AQI
56AQI
72AQI
58AQI
81AQI
62AQI
57AQI
59AQI
52AQI
50AQI
45AQI
No. of days
202560AQI
Highest AQI recorded in
March81AQI
Lowest AQI recorded in
September45AQI
202467AQI
Highest AQI recorded in
January83AQI
Lowest AQI recorded in
September48AQI
202365AQI
Highest AQI recorded in
February85AQI
Lowest AQI recorded in
November50AQI
202269AQI
Highest AQI recorded in
February84AQI
Lowest AQI recorded in
August47AQI
202171AQI
Highest AQI recorded in
March112AQI
Lowest AQI recorded in
September40AQI
202066AQI
Highest AQI recorded in
December87AQI
Lowest AQI recorded in
September45AQI
Most & Least Polluted Years Over the Last 6 Years
Yesangun's annual 2025 AQI (60) shows an average percentage change of -11.3% (improved AQI) compared to previous years: 2020 (66), 2021 (71), 2022 (69), 2023 (65), 2024 (67).