Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Buyeo Gun Buyeo, Asan, Chungnam, South Korea Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+

October Air Quality Analysis

Buyeo Gun Buyeo, Asan, Chungnam, South Korea

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
16th Oct 2022
95AQI
Lowest AQI recorded on
7th Oct 2025
22AQI

Same Day Analysis (31st October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 63 of Moderate air quality, showing improvement over 2024 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

2025 Days Vs Air Quality

Buyeo Gun Buyeo, Asan, Chungnam, South Korea

2025

40%

123

56%

172

3%

10

Total number of days with different AQI categories in last 305 days in 2025 (60 days remaining)

Good
123 Days
Moderate
172 Days
Poor
10 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 40%

Health Risk Level:

Significant

In 2025, 40% of 305 days were within WHO’s safe air quality limits, and 60% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.

Annual Air Quality Insights

Buyeo Gun Buyeo, Asan, Chungnam, South Korea

AQI levels in 2025

AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
74AQI
2nd January 2025
64AQI
3rd January 2025
62AQI
4th January 2025
65AQI
5th January 2025
72AQI
6th January 2025
75AQI
7th January 2025
59AQI
8th January 2025
66AQI
9th January 2025
42AQI
10th January 2025
63AQI
11th January 2025
65AQI
12th January 2025
80AQI
13th January 2025
87AQI
14th January 2025
90AQI
15th January 2025
60AQI
16th January 2025
71AQI
17th January 2025
77AQI
18th January 2025
82AQI
19th January 2025
91AQI
20th January 2025
112AQI
21st January 2025
135AQI
22nd January 2025
140AQI
23rd January 2025
114AQI
24th January 2025
115AQI
25th January 2025
82AQI
26th January 2025
61AQI
27th January 2025
66AQI
28th January 2025
50AQI
29th January 2025
56AQI
30th January 2025
64AQI
31st January 2025
81AQI
1st February 2025
87AQI
2nd February 2025
95AQI
3rd February 2025
58AQI
4th February 2025
54AQI
5th February 2025
51AQI
6th February 2025
57AQI
7th February 2025
48AQI
8th February 2025
46AQI
9th February 2025
53AQI
10th February 2025
61AQI
11th February 2025
78AQI
12th February 2025
72AQI
13th February 2025
54AQI
14th February 2025
79AQI
15th February 2025
57AQI
16th February 2025
109AQI
17th February 2025
55AQI
18th February 2025
66AQI
19th February 2025
48AQI
20th February 2025
58AQI
21st February 2025
55AQI
22nd February 2025
59AQI
23rd February 2025
52AQI
24th February 2025
55AQI
25th February 2025
58AQI
26th February 2025
72AQI
27th February 2025
70AQI
28th February 2025
70AQI
1st March 2025
96AQI
2nd March 2025
67AQI
3rd March 2025
54AQI
4th March 2025
45AQI
5th March 2025
46AQI
6th March 2025
65AQI
7th March 2025
78AQI
8th March 2025
79AQI
9th March 2025
95AQI
10th March 2025
93AQI
11th March 2025
93AQI
12th March 2025
93AQI
13th March 2025
76AQI
14th March 2025
81AQI
15th March 2025
50AQI
16th March 2025
67AQI
17th March 2025
65AQI
18th March 2025
79AQI
19th March 2025
83AQI
20th March 2025
99AQI
21st March 2025
99AQI
22nd March 2025
111AQI
23rd March 2025
114AQI
24th March 2025
111AQI
25th March 2025
128AQI
26th March 2025
85AQI
27th March 2025
87AQI
28th March 2025
59AQI
29th March 2025
51AQI
30th March 2025
48AQI
31st March 2025
63AQI
1st April 2025
70AQI
2nd April 2025
79AQI
3rd April 2025
76AQI
4th April 2025
74AQI
5th April 2025
63AQI
6th April 2025
64AQI
7th April 2025
67AQI
8th April 2025
70AQI
9th April 2025
65AQI
10th April 2025
72AQI
11th April 2025
74AQI
12th April 2025
58AQI
13th April 2025
59AQI
14th April 2025
44AQI
15th April 2025
55AQI
16th April 2025
66AQI
17th April 2025
57AQI
18th April 2025
73AQI
19th April 2025
47AQI
20th April 2025
63AQI
21st April 2025
50AQI
22nd April 2025
40AQI
23rd April 2025
43AQI
24th April 2025
54AQI
25th April 2025
57AQI
26th April 2025
45AQI
27th April 2025
40AQI
28th April 2025
51AQI
29th April 2025
59AQI
30th April 2025
57AQI
1st May 2025
52AQI
2nd May 2025
49AQI
3rd May 2025
46AQI
4th May 2025
45AQI
5th May 2025
46AQI
6th May 2025
45AQI
7th May 2025
48AQI
8th May 2025
58AQI
9th May 2025
42AQI
10th May 2025
51AQI
11th May 2025
63AQI
12th May 2025
65AQI
13th May 2025
71AQI
14th May 2025
70AQI
15th May 2025
49AQI
16th May 2025
45AQI
17th May 2025
46AQI
18th May 2025
58AQI
19th May 2025
56AQI
20th May 2025
39AQI
21st May 2025
47AQI
22nd May 2025
46AQI
23rd May 2025
57AQI
24th May 2025
49AQI
25th May 2025
48AQI
26th May 2025
60AQI
27th May 2025
67AQI
28th May 2025
68AQI
29th May 2025
73AQI
30th May 2025
77AQI
31st May 2025
80AQI
1st June 2025
79AQI
2nd June 2025
86AQI
3rd June 2025
70AQI
4th June 2025
60AQI
5th June 2025
56AQI
6th June 2025
60AQI
7th June 2025
67AQI
8th June 2025
62AQI
9th June 2025
62AQI
10th June 2025
55AQI
11th June 2025
55AQI
12th June 2025
57AQI
13th June 2025
66AQI
14th June 2025
49AQI
15th June 2025
60AQI
16th June 2025
64AQI
17th June 2025
63AQI
18th June 2025
62AQI
19th June 2025
65AQI
20th June 2025
46AQI
21st June 2025
41AQI
22nd June 2025
32AQI
23rd June 2025
48AQI
24th June 2025
49AQI
25th June 2025
39AQI
26th June 2025
51AQI
27th June 2025
57AQI
28th June 2025
57AQI
29th June 2025
44AQI
30th June 2025
43AQI
1st July 2025
42AQI
2nd July 2025
46AQI
3rd July 2025
51AQI
4th July 2025
51AQI
5th July 2025
49AQI
6th July 2025
48AQI
7th July 2025
59AQI
8th July 2025
72AQI
9th July 2025
56AQI
10th July 2025
55AQI
11th July 2025
57AQI
12th July 2025
52AQI
13th July 2025
60AQI
14th July 2025
54AQI
15th July 2025
42AQI
16th July 2025
51AQI
17th July 2025
43AQI
18th July 2025
47AQI
19th July 2025
38AQI
20th July 2025
44AQI
21st July 2025
40AQI
22nd July 2025
37AQI
23rd July 2025
48AQI
24th July 2025
54AQI
25th July 2025
59AQI
26th July 2025
50AQI
27th July 2025
43AQI
28th July 2025
56AQI
29th July 2025
62AQI
30th July 2025
55AQI
31st July 2025
55AQI
1st August 2025
55AQI
2nd August 2025
62AQI
3rd August 2025
63AQI
4th August 2025
53AQI
5th August 2025
50AQI
6th August 2025
49AQI
7th August 2025
52AQI
8th August 2025
53AQI
9th August 2025
54AQI
10th August 2025
50AQI
11th August 2025
55AQI
12th August 2025
47AQI
13th August 2025
43AQI
14th August 2025
45AQI
15th August 2025
42AQI
16th August 2025
42AQI
17th August 2025
43AQI
18th August 2025
51AQI
19th August 2025
46AQI
20th August 2025
46AQI
21st August 2025
47AQI
22nd August 2025
47AQI
23rd August 2025
48AQI
24th August 2025
53AQI
25th August 2025
50AQI
26th August 2025
43AQI
27th August 2025
49AQI
28th August 2025
52AQI
29th August 2025
48AQI
30th August 2025
44AQI
31st August 2025
49AQI
1st September 2025
42AQI
2nd September 2025
47AQI
3rd September 2025
50AQI
4th September 2025
48AQI
5th September 2025
40AQI
6th September 2025
44AQI
7th September 2025
40AQI
8th September 2025
46AQI
9th September 2025
46AQI
10th September 2025
49AQI
11th September 2025
50AQI
12th September 2025
40AQI
13th September 2025
41AQI
14th September 2025
42AQI
15th September 2025
44AQI
16th September 2025
43AQI
17th September 2025
36AQI
18th September 2025
44AQI
19th September 2025
33AQI
20th September 2025
30AQI
21st September 2025
31AQI
22nd September 2025
29AQI
23rd September 2025
32AQI
24th September 2025
31AQI
25th September 2025
22AQI
26th September 2025
39AQI
27th September 2025
51AQI
28th September 2025
23AQI
29th September 2025
44AQI
30th September 2025
45AQI
1st October 2025
50AQI
2nd October 2025
60AQI
3rd October 2025
47AQI
4th October 2025
44AQI
5th October 2025
54AQI
6th October 2025
45AQI
7th October 2025
22AQI
8th October 2025
40AQI
9th October 2025
40AQI
10th October 2025
49AQI
11th October 2025
56AQI
12th October 2025
42AQI
13th October 2025
40AQI
14th October 2025
29AQI
15th October 2025
45AQI
16th October 2025
42AQI
17th October 2025
52AQI
18th October 2025
43AQI
19th October 2025
53AQI
20th October 2025
61AQI
21st October 2025
57AQI
22nd October 2025
50AQI
23rd October 2025
40AQI
24th October 2025
36AQI
25th October 2025
46AQI
26th October 2025
56AQI
27th October 2025
38AQI
28th October 2025
41AQI
29th October 2025
56AQI
30th October 2025
59AQI
31st October 2025
63AQI
1st November 2025
68AQI
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025

78AQI

63AQI

79AQI

60AQI

55AQI

57AQI

51AQI

49AQI

40AQI

47AQI

68AQI

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202558AQI

2
24
5
3
24
1
4
23
4
7
23
15
16
9
21
14
17
20
11
29
1
20
11
1
123
172
10

Highest AQI recorded in

March

79AQI

Lowest AQI recorded in

September

40AQI

202456AQI

8
17
5
9
12
7
1
8
20
3
8
20
2
18
13
13
17
28
3
16
15
22
8
15
16
8
21
1
4
27
157
189
18
1

Highest AQI recorded in

February

75AQI

Lowest AQI recorded in

July

31AQI

202367AQI

8
21
2
1
15
8
3
2
18
11
1
21
7
1
6
25
7
23
16
15
13
17
1
17
13
8
23
10
16
3
8
17
6
97
224
38
4

Highest AQI recorded in

February

95AQI

Lowest AQI recorded in

September

48AQI

202261AQI

9
18
4
3
14
3
2
6
22
3
6
24
4
26
1
17
13
8
16
1
17
12
14
17
6
22
2
11
20
101
205
13
2

Highest AQI recorded in

February

81AQI

Lowest AQI recorded in

June

47AQI

202172AQI

6
25
6
15
7
3
21
5
1
1
2
26
2
4
22
3
2
3
18
9
17
12
2
5
25
1
24
6
7
24
7
21
2
11
14
5
1
95
229
36
1
1
3

Highest AQI recorded in

March

97AQI

Lowest AQI recorded in

September

43AQI

202064AQI

2
8
3
3
16
2
2
16
5
23
2
18
13
15
16
20
9
1
8
22
1
8
15
7
4
23
4
85
161
20

Highest AQI recorded in

March

81AQI

Lowest AQI recorded in

July

48AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2021(Avg.)
72AQI
Least Polluted Year Recorded
2024(Avg.)
56AQI

Buyeo Gun Buyeo's annual 2025 AQI (58) shows an average percentage change of -8.6% (improved AQI) compared to previous years: 2020 (64), 2021 (72), 2022 (61), 2023 (67), 2024 (56).