Yeosan myeon, Hosan, Chungnam, South Korea Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Yeosan myeon, Hosan, Chungnam, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 1st highest AQI at 64 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Yeosan myeon, Hosan, Chungnam, South Korea
6 AM4th Oct 2025
6 PM
5 AM5th Oct 2025
AQI
AQI
39AQI
18AQI
In the last 24 hours,
Yeosan myeon's AQI reached its highest point of 39 at 12 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Yeosan myeon, Hosan, Chungnam, South Korea
26°C22/32°C
26°C23/31°C
25°C21/29°C
22°C19/28°C
20°C19/22°C
23°C19/28°C
23°C18/29°C
22°C21/25°C
24°C21/28°C
24°C21/28°C
24°C20/29°C
24°C21/30°C
23°C20/26°C
21°C18/25°C
19°C18/22°C
19°C17/24°C
20°C16/26°C
20°C17/26°C
20°C18/25°C
22°C17/28°C
22°C21/23°C
22°C17/27°C
22°C18/26°C
20°C18/21°C
20°C16/24°C
18°C15/23°C
19°C15/25°C
20°C17/25°C
18°C17/18°C
--°C/°C
--°C/°C
45AQI
39AQI
44AQI
39AQI
2025 Days Vs Air Quality
Yeosan myeon, Hosan, Chungnam, South Korea
38%
105
58%
161
4%
10
Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)
Under WHO’s Safe Air Quality Limits: 38%
Health Risk Level:
High
In 2025, 38% of 277 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
Yeosan myeon, Hosan, Chungnam, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
66AQI
65AQI
54AQI
58AQI
60AQI
77AQI
55AQI
63AQI
40AQI
50AQI
50AQI
59AQI
70AQI
88AQI
57AQI
63AQI
79AQI
82AQI
87AQI
110AQI
136AQI
142AQI
117AQI
102AQI
74AQI
58AQI
63AQI
45AQI
48AQI
59AQI
69AQI
80AQI
87AQI
57AQI
46AQI
45AQI
46AQI
46AQI
39AQI
47AQI
57AQI
64AQI
59AQI
44AQI
70AQI
55AQI
101AQI
48AQI
54AQI
43AQI
45AQI
47AQI
54AQI
46AQI
49AQI
49AQI
71AQI
69AQI
65AQI
87AQI
71AQI
51AQI
44AQI
34AQI
63AQI
78AQI
76AQI
88AQI
88AQI
86AQI
84AQI
78AQI
75AQI
46AQI
63AQI
62AQI
73AQI
80AQI
90AQI
97AQI
104AQI
115AQI
105AQI
130AQI
91AQI
81AQI
58AQI
49AQI
48AQI
62AQI
74AQI
78AQI
83AQI
82AQI
67AQI
63AQI
65AQI
73AQI
68AQI
76AQI
84AQI
62AQI
59AQI
42AQI
57AQI
61AQI
66AQI
79AQI
52AQI
65AQI
60AQI
39AQI
54AQI
59AQI
61AQI
49AQI
41AQI
57AQI
64AQI
60AQI
55AQI
50AQI
49AQI
48AQI
47AQI
50AQI
52AQI
62AQI
46AQI
53AQI
65AQI
66AQI
71AQI
71AQI
54AQI
48AQI
50AQI
59AQI
59AQI
44AQI
44AQI
56AQI
58AQI
49AQI
43AQI
64AQI
74AQI
76AQI
81AQI
83AQI
87AQI
91AQI
96AQI
84AQI
67AQI
59AQI
63AQI
66AQI
64AQI
63AQI
60AQI
57AQI
60AQI
65AQI
48AQI
62AQI
64AQI
65AQI
66AQI
66AQI
54AQI
50AQI
42AQI
49AQI
51AQI
46AQI
59AQI
61AQI
59AQI
52AQI
50AQI
48AQI
50AQI
57AQI
55AQI
51AQI
53AQI
57AQI
62AQI
54AQI
53AQI
54AQI
53AQI
61AQI
59AQI
49AQI
55AQI
47AQI
47AQI
42AQI
48AQI
44AQI
42AQI
47AQI
52AQI
55AQI
49AQI
45AQI
54AQI
57AQI
54AQI
55AQI
56AQI
61AQI
62AQI
52AQI
51AQI
51AQI
51AQI
52AQI
55AQI
52AQI
55AQI
45AQI
39AQI
38AQI
36AQI
37AQI
40AQI
49AQI
44AQI
46AQI
46AQI
45AQI
46AQI
50AQI
43AQI
40AQI
48AQI
52AQI
44AQI
41AQI
47AQI
38AQI
43AQI
48AQI
42AQI
43AQI
37AQI
38AQI
45AQI
44AQI
45AQI
43AQI
41AQI
35AQI
39AQI
44AQI
45AQI
36AQI
39AQI
34AQI
32AQI
31AQI
30AQI
30AQI
34AQI
24AQI
56AQI
59AQI
38AQI
47AQI
44AQI
58AQI
76AQI
64AQI
72AQI
57AQI
76AQI
63AQI
59AQI
61AQI
52AQI
48AQI
40AQI
66AQI
No. of days
202559AQI
Highest AQI recorded in
March76AQI
Lowest AQI recorded in
September40AQI
202457AQI
Highest AQI recorded in
April67AQI
Lowest AQI recorded in
July37AQI
202366AQI
Highest AQI recorded in
February96AQI
Lowest AQI recorded in
July46AQI
202273AQI
Highest AQI recorded in
November87AQI
Lowest AQI recorded in
September56AQI
Most & Least Polluted Years Over the Last 4 Years
Yeosan myeon's annual 2025 AQI (59) shows an average percentage change of -9.05% (improved AQI) compared to previous years: 2022 (73), 2023 (66), 2024 (57).