Oeyeondo, Boryeong, 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
Oeyeondo, Boryeong, Chungnam, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 58 of Moderate air quality, showing improvement over 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Oeyeondo, Boryeong, Chungnam, South Korea
6 AM3rd Oct 2025
6 PM
5 AM4th Oct 2025
56AQI
39AQI
46AQI
23AQI
In the last 24 hours,
Oeyeondo's AQI reached its highest point of 56 at 9 AM during the Day, while the lowest point, 23, was recorded at 3 AM during the Night between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Oeyeondo, Boryeong, Chungnam, South Korea
24°C23/25°C
26°C23/29°C
26°C24/29°C
25°C22/27°C
23°C21/27°C
22°C19/24°C
23°C19/28°C
24°C21/29°C
23°C22/24°C
24°C22/26°C
24°C22/27°C
24°C21/28°C
25°C23/28°C
23°C21/25°C
22°C19/25°C
19°C17/21°C
19°C17/23°C
21°C18/25°C
21°C19/25°C
21°C19/24°C
22°C19/24°C
22°C21/23°C
21°C18/25°C
22°C19/25°C
21°C19/21°C
20°C18/23°C
19°C17/22°C
19°C17/23°C
21°C19/24°C
18°C17/19°C
--°C/°C
46AQI
38AQI
46AQI
40AQI
2025 Days Vs Air Quality
Oeyeondo, Boryeong, Chungnam, South Korea
34%
93
63%
173
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: 34%
Health Risk Level:
High
In 2025, 34% 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
Oeyeondo, Boryeong, Chungnam, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
83AQI
57AQI
63AQI
58AQI
84AQI
94AQI
61AQI
65AQI
46AQI
58AQI
65AQI
72AQI
84AQI
110AQI
64AQI
79AQI
62AQI
79AQI
81AQI
122AQI
101AQI
133AQI
77AQI
99AQI
75AQI
61AQI
73AQI
59AQI
62AQI
65AQI
74AQI
96AQI
92AQI
70AQI
60AQI
52AQI
55AQI
52AQI
49AQI
52AQI
60AQI
68AQI
59AQI
55AQI
78AQI
61AQI
103AQI
56AQI
67AQI
49AQI
56AQI
56AQI
60AQI
59AQI
59AQI
58AQI
77AQI
61AQI
66AQI
70AQI
67AQI
50AQI
48AQI
43AQI
79AQI
78AQI
77AQI
84AQI
98AQI
94AQI
99AQI
78AQI
76AQI
66AQI
71AQI
67AQI
87AQI
85AQI
94AQI
104AQI
118AQI
117AQI
114AQI
114AQI
96AQI
86AQI
70AQI
56AQI
53AQI
64AQI
78AQI
72AQI
92AQI
87AQI
79AQI
74AQI
74AQI
84AQI
74AQI
79AQI
70AQI
66AQI
61AQI
45AQI
59AQI
63AQI
66AQI
75AQI
49AQI
69AQI
55AQI
43AQI
44AQI
60AQI
48AQI
51AQI
46AQI
66AQI
64AQI
59AQI
55AQI
53AQI
49AQI
51AQI
49AQI
55AQI
53AQI
59AQI
44AQI
55AQI
69AQI
74AQI
75AQI
74AQI
57AQI
43AQI
49AQI
58AQI
55AQI
37AQI
40AQI
49AQI
58AQI
59AQI
53AQI
65AQI
64AQI
64AQI
69AQI
67AQI
67AQI
69AQI
72AQI
64AQI
55AQI
54AQI
56AQI
58AQI
57AQI
48AQI
43AQI
56AQI
53AQI
58AQI
57AQI
51AQI
51AQI
53AQI
57AQI
55AQI
47AQI
48AQI
49AQI
53AQI
57AQI
52AQI
58AQI
59AQI
55AQI
49AQI
47AQI
46AQI
51AQI
49AQI
51AQI
47AQI
48AQI
51AQI
57AQI
57AQI
55AQI
56AQI
55AQI
58AQI
56AQI
49AQI
57AQI
55AQI
51AQI
48AQI
47AQI
43AQI
39AQI
39AQI
45AQI
63AQI
63AQI
51AQI
55AQI
57AQI
59AQI
54AQI
55AQI
62AQI
55AQI
48AQI
46AQI
43AQI
46AQI
46AQI
51AQI
52AQI
47AQI
41AQI
36AQI
34AQI
34AQI
32AQI
37AQI
47AQI
40AQI
43AQI
38AQI
39AQI
43AQI
42AQI
40AQI
40AQI
43AQI
43AQI
37AQI
37AQI
42AQI
36AQI
45AQI
48AQI
43AQI
39AQI
36AQI
39AQI
44AQI
45AQI
50AQI
46AQI
39AQI
37AQI
39AQI
40AQI
39AQI
35AQI
46AQI
35AQI
33AQI
36AQI
32AQI
35AQI
34AQI
43AQI
60AQI
65AQI
34AQI
41AQI
44AQI
57AQI
47AQI
58AQI
76AQI
64AQI
81AQI
65AQI
57AQI
55AQI
52AQI
43AQI
41AQI
54AQI
No. of days
202559AQI
Highest AQI recorded in
March81AQI
Lowest AQI recorded in
September41AQI
202461AQI
Highest AQI recorded in
March78AQI
Lowest AQI recorded in
July37AQI
202368AQI
Highest AQI recorded in
April98AQI
Lowest AQI recorded in
September37AQI
202272AQI
Highest AQI recorded in
November99AQI
Lowest AQI recorded in
August44AQI
202162AQI
Highest AQI recorded in
April85AQI
Lowest AQI recorded in
September44AQI
Most & Least Polluted Years Over the Last 5 Years
Oeyeondo's annual 2025 AQI (59) shows an average percentage change of -9.06% (improved AQI) compared to previous years: 2021 (62), 2022 (72), 2023 (68), 2024 (61).