Cheongwon Gun, Cheongju, Chungbuk, 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
Cheongwon Gun, Cheongju, Chungbuk, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (21st September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks the most lowest AQI at 27 of Good air quality, showing improvement over 2024, 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025
Cheongwon Gun, Cheongju, Chungbuk, South Korea
6 AM21st Sep 2025
6 PM
5 AM22nd Sep 2025
32AQI
15AQI
34AQI
14AQI
In the last 24 hours,
Cheongwon Gun's AQI reached its highest point of 34 at 2 AM during the Night, while the lowest point, 14, was recorded at 7 PM during the Night between 21st Sep and 22nd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Cheongwon Gun, Cheongju, Chungbuk, South Korea
27°C22/33°C
28°C24/34°C
27°C23/33°C
25°C22/29°C
25°C20/31°C
26°C21/32°C
26°C22/32°C
26°C22/32°C
27°C22/33°C
26°C22/32°C
24°C21/29°C
25°C19/32°C
22°C21/25°C
26°C20/33°C
26°C21/32°C
24°C20/28°C
22°C17/27°C
20°C19/23°C
22°C19/28°C
23°C17/30°C
21°C19/24°C
24°C20/28°C
23°C19/28°C
24°C19/30°C
24°C20/29°C
22°C20/24°C
19°C17/23°C
17°C16/19°C
17°C15/22°C
19°C14/24°C
--°C/°C
44AQI
36AQI
45AQI
38AQI
2025 Days Vs Air Quality
Cheongwon Gun, Cheongju, Chungbuk, South Korea
42%
112
53%
139
5%
13
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 42%
Health Risk Level:
Significant
In 2025, 42% of 265 days were within WHO’s safe air quality limits, and 58% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.
Annual Air Quality Insights
Cheongwon Gun, Cheongju, Chungbuk, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
72AQI
76AQI
60AQI
61AQI
70AQI
95AQI
62AQI
73AQI
42AQI
64AQI
63AQI
86AQI
93AQI
95AQI
61AQI
72AQI
95AQI
100AQI
102AQI
117AQI
143AQI
140AQI
129AQI
119AQI
83AQI
63AQI
66AQI
56AQI
60AQI
58AQI
78AQI
86AQI
88AQI
61AQI
53AQI
47AQI
53AQI
49AQI
46AQI
56AQI
60AQI
85AQI
82AQI
53AQI
80AQI
60AQI
107AQI
51AQI
62AQI
48AQI
55AQI
54AQI
59AQI
58AQI
54AQI
57AQI
78AQI
64AQI
78AQI
112AQI
80AQI
60AQI
48AQI
40AQI
71AQI
87AQI
85AQI
92AQI
98AQI
108AQI
96AQI
94AQI
81AQI
50AQI
69AQI
59AQI
73AQI
76AQI
87AQI
89AQI
103AQI
101AQI
105AQI
126AQI
89AQI
88AQI
67AQI
47AQI
43AQI
54AQI
70AQI
72AQI
76AQI
80AQI
65AQI
64AQI
64AQI
71AQI
65AQI
71AQI
77AQI
61AQI
55AQI
42AQI
52AQI
60AQI
60AQI
76AQI
50AQI
60AQI
38AQI
47AQI
32AQI
57AQI
53AQI
50AQI
38AQI
49AQI
58AQI
60AQI
45AQI
49AQI
45AQI
43AQI
45AQI
39AQI
49AQI
65AQI
45AQI
44AQI
63AQI
65AQI
68AQI
70AQI
49AQI
43AQI
42AQI
55AQI
56AQI
37AQI
42AQI
49AQI
55AQI
42AQI
42AQI
55AQI
66AQI
73AQI
73AQI
58AQI
70AQI
80AQI
93AQI
77AQI
56AQI
52AQI
58AQI
63AQI
58AQI
58AQI
58AQI
48AQI
46AQI
59AQI
40AQI
47AQI
50AQI
59AQI
63AQI
62AQI
49AQI
45AQI
42AQI
48AQI
47AQI
40AQI
46AQI
58AQI
57AQI
48AQI
45AQI
44AQI
43AQI
50AQI
50AQI
47AQI
50AQI
56AQI
56AQI
52AQI
51AQI
52AQI
50AQI
58AQI
55AQI
45AQI
52AQI
42AQI
45AQI
32AQI
39AQI
40AQI
35AQI
49AQI
56AQI
52AQI
41AQI
36AQI
54AQI
59AQI
52AQI
52AQI
56AQI
62AQI
60AQI
49AQI
48AQI
45AQI
49AQI
52AQI
55AQI
46AQI
53AQI
40AQI
38AQI
37AQI
36AQI
37AQI
39AQI
49AQI
41AQI
45AQI
44AQI
45AQI
48AQI
49AQI
48AQI
42AQI
46AQI
50AQI
46AQI
42AQI
47AQI
38AQI
44AQI
46AQI
39AQI
33AQI
36AQI
38AQI
46AQI
47AQI
45AQI
45AQI
44AQI
35AQI
40AQI
47AQI
43AQI
34AQI
30AQI
30AQI
28AQI
27AQI
82AQI
64AQI
80AQI
59AQI
53AQI
55AQI
48AQI
47AQI
39AQI
No. of days
202559AQI
Highest AQI recorded in
January82AQI
Lowest AQI recorded in
September39AQI
202460AQI
Highest AQI recorded in
January82AQI
Lowest AQI recorded in
July32AQI
202366AQI
Highest AQI recorded in
March91AQI
Lowest AQI recorded in
September49AQI
202269AQI
Highest AQI recorded in
February86AQI
Lowest AQI recorded in
August30AQI
202163AQI
Highest AQI recorded in
March90AQI
Lowest AQI recorded in
September36AQI
202063AQI
Highest AQI recorded in
December80AQI
Lowest AQI recorded in
August39AQI
Most & Least Polluted Years Over the Last 6 Years
Cheongwon Gun's annual 2025 AQI (59) shows an average percentage change of -7.8% (improved AQI) compared to previous years: 2020 (63), 2021 (63), 2022 (69), 2023 (66), 2024 (60).