Bono, Ansan, Gyeonggi, 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
Bono, Ansan, Gyeonggi, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (21st September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 25 of Good air quality, showing improvement over 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Bono, Ansan, Gyeonggi, South Korea
6 AM22nd Sep 2025
6 PM
5 AM23rd Sep 2025
AQI
AQI
38AQI
15AQI
In the last 24 hours,
Bono's AQI reached its highest point of 38 at 6 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 22nd Sep and 23rd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Bono, Ansan, Gyeonggi, South Korea
29°C26/33°C
29°C26/32°C
27°C24/30°C
27°C23/31°C
27°C24/32°C
28°C24/33°C
28°C26/33°C
28°C25/33°C
26°C23/30°C
25°C22/29°C
27°C23/31°C
25°C23/27°C
27°C23/32°C
27°C24/32°C
25°C23/28°C
25°C22/28°C
25°C22/28°C
26°C22/30°C
26°C23/31°C
25°C20/29°C
23°C20/26°C
25°C22/28°C
26°C23/31°C
25°C23/29°C
23°C19/26°C
21°C19/24°C
18°C16/20°C
18°C16/20°C
22°C18/26°C
--°C/°C
--°C/°C
46AQI
39AQI
46AQI
40AQI
2025 Days Vs Air Quality
Bono, Ansan, Gyeonggi, South Korea
30%
80
64%
169
5%
14
0.3%
1
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 30%
Health Risk Level:
High
In 2025, 30% of 265 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
Bono, Ansan, Gyeonggi, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
79AQI
63AQI
62AQI
61AQI
71AQI
96AQI
57AQI
69AQI
41AQI
51AQI
58AQI
80AQI
92AQI
104AQI
54AQI
78AQI
80AQI
82AQI
84AQI
132AQI
133AQI
151AQI
119AQI
112AQI
71AQI
57AQI
65AQI
58AQI
60AQI
53AQI
74AQI
80AQI
97AQI
52AQI
55AQI
44AQI
58AQI
47AQI
46AQI
50AQI
57AQI
67AQI
79AQI
52AQI
92AQI
57AQI
113AQI
51AQI
62AQI
48AQI
57AQI
56AQI
58AQI
54AQI
58AQI
57AQI
69AQI
61AQI
84AQI
98AQI
78AQI
51AQI
46AQI
37AQI
79AQI
95AQI
89AQI
101AQI
122AQI
111AQI
108AQI
98AQI
81AQI
61AQI
74AQI
67AQI
73AQI
82AQI
93AQI
98AQI
102AQI
111AQI
110AQI
126AQI
94AQI
91AQI
61AQI
48AQI
44AQI
61AQI
74AQI
86AQI
79AQI
84AQI
72AQI
67AQI
75AQI
74AQI
72AQI
80AQI
89AQI
64AQI
64AQI
48AQI
57AQI
59AQI
66AQI
74AQI
46AQI
59AQI
52AQI
43AQI
37AQI
63AQI
67AQI
57AQI
44AQI
60AQI
73AQI
59AQI
61AQI
51AQI
47AQI
48AQI
52AQI
43AQI
55AQI
62AQI
51AQI
58AQI
68AQI
69AQI
75AQI
73AQI
67AQI
54AQI
49AQI
58AQI
62AQI
40AQI
51AQI
48AQI
65AQI
49AQI
50AQI
67AQI
74AQI
79AQI
80AQI
87AQI
87AQI
83AQI
89AQI
73AQI
58AQI
59AQI
59AQI
68AQI
56AQI
63AQI
47AQI
55AQI
67AQI
75AQI
62AQI
58AQI
67AQI
64AQI
66AQI
66AQI
48AQI
59AQI
71AQI
75AQI
61AQI
50AQI
57AQI
65AQI
64AQI
47AQI
46AQI
43AQI
43AQI
60AQI
54AQI
49AQI
53AQI
69AQI
62AQI
59AQI
51AQI
49AQI
50AQI
62AQI
53AQI
43AQI
49AQI
37AQI
42AQI
34AQI
39AQI
38AQI
40AQI
46AQI
52AQI
63AQI
55AQI
48AQI
64AQI
69AQI
69AQI
66AQI
60AQI
61AQI
62AQI
50AQI
51AQI
47AQI
49AQI
56AQI
55AQI
56AQI
58AQI
51AQI
40AQI
42AQI
39AQI
38AQI
41AQI
51AQI
44AQI
47AQI
48AQI
48AQI
50AQI
52AQI
47AQI
43AQI
51AQI
51AQI
44AQI
42AQI
50AQI
39AQI
48AQI
51AQI
36AQI
42AQI
39AQI
42AQI
49AQI
54AQI
50AQI
50AQI
47AQI
40AQI
43AQI
49AQI
45AQI
36AQI
32AQI
32AQI
28AQI
25AQI
79AQI
63AQI
84AQI
65AQI
61AQI
63AQI
52AQI
49AQI
42AQI
No. of days
202563AQI
Highest AQI recorded in
March84AQI
Lowest AQI recorded in
September42AQI
202457AQI
Highest AQI recorded in
January74AQI
Lowest AQI recorded in
July37AQI
202364AQI
Highest AQI recorded in
February91AQI
Lowest AQI recorded in
September42AQI
202262AQI
Highest AQI recorded in
January86AQI
Lowest AQI recorded in
August29AQI
202167AQI
Highest AQI recorded in
March99AQI
Lowest AQI recorded in
September38AQI
202068AQI
Highest AQI recorded in
December89AQI
Lowest AQI recorded in
April51AQI
Most & Least Polluted Years Over the Last 6 Years
Bono's annual 2025 AQI (63) shows an average percentage change of -1.2% (improved AQI) compared to previous years: 2020 (68), 2021 (67), 2022 (62), 2023 (64), 2024 (57).