Seohaean ro, 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
Seohaean ro, Ansan, Gyeonggi, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (24th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 33 of Good air quality, showing improvement over 2024, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 24th Sep - 25th Sep 2025
Seohaean ro, Ansan, Gyeonggi, South Korea
6 AM24th Sep 2025
6 PM
5 AM25th Sep 2025
48AQI
21AQI
38AQI
28AQI
In the last 24 hours,
Seohaean ro's AQI reached its highest point of 48 at 4 PM during the Day, while the lowest point, 21, was recorded at 10 AM during the Day between 24th Sep and 25th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Seohaean ro, Ansan, Gyeonggi, South Korea
26°C25/28°C
26°C24/29°C
27°C25/28°C
27°C26/28°C
28°C26/29°C
28°C26/29°C
26°C25/28°C
25°C23/28°C
27°C24/29°C
25°C23/28°C
27°C24/30°C
27°C25/29°C
26°C25/27°C
25°C24/28°C
25°C24/27°C
26°C22/30°C
26°C23/30°C
25°C22/28°C
24°C21/27°C
24°C23/27°C
25°C23/28°C
26°C25/27°C
23°C21/24°C
22°C20/25°C
20°C18/21°C
19°C18/22°C
21°C18/25°C
22°C20/25°C
23°C21/26°C
22°C22/24°C
--°C/°C
46AQI
37AQI
46AQI
40AQI
2025 Days Vs Air Quality
Seohaean ro, Ansan, Gyeonggi, South Korea
25%
67
68%
181
7%
19
Total number of days with different AQI categories in last 268 days in 2025 (97 days remaining)
Under WHO’s Safe Air Quality Limits: 25%
Health Risk Level:
Very high
In 2025, 25% of 268 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.
Annual Air Quality Insights
Seohaean ro, Ansan, Gyeonggi, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
77AQI
56AQI
57AQI
63AQI
73AQI
97AQI
52AQI
70AQI
42AQI
51AQI
56AQI
75AQI
91AQI
107AQI
54AQI
83AQI
73AQI
87AQI
80AQI
132AQI
133AQI
150AQI
112AQI
109AQI
70AQI
56AQI
69AQI
57AQI
60AQI
47AQI
73AQI
82AQI
88AQI
53AQI
49AQI
42AQI
55AQI
43AQI
39AQI
45AQI
56AQI
73AQI
79AQI
54AQI
90AQI
60AQI
113AQI
48AQI
61AQI
45AQI
51AQI
51AQI
55AQI
52AQI
53AQI
55AQI
66AQI
61AQI
78AQI
107AQI
85AQI
58AQI
46AQI
40AQI
78AQI
97AQI
87AQI
106AQI
122AQI
117AQI
110AQI
104AQI
80AQI
64AQI
73AQI
67AQI
77AQI
77AQI
97AQI
104AQI
111AQI
123AQI
118AQI
132AQI
102AQI
95AQI
60AQI
50AQI
44AQI
64AQI
77AQI
88AQI
93AQI
87AQI
80AQI
70AQI
79AQI
80AQI
82AQI
85AQI
99AQI
72AQI
66AQI
47AQI
61AQI
67AQI
73AQI
79AQI
52AQI
69AQI
61AQI
51AQI
37AQI
70AQI
58AQI
57AQI
42AQI
62AQI
68AQI
61AQI
65AQI
49AQI
51AQI
49AQI
57AQI
45AQI
54AQI
64AQI
57AQI
65AQI
80AQI
80AQI
81AQI
75AQI
67AQI
63AQI
54AQI
58AQI
64AQI
41AQI
53AQI
58AQI
69AQI
54AQI
54AQI
74AQI
90AQI
96AQI
86AQI
99AQI
96AQI
91AQI
93AQI
77AQI
61AQI
62AQI
60AQI
69AQI
58AQI
65AQI
55AQI
59AQI
67AQI
73AQI
72AQI
60AQI
70AQI
71AQI
73AQI
69AQI
57AQI
61AQI
70AQI
77AQI
69AQI
61AQI
59AQI
68AQI
64AQI
54AQI
52AQI
48AQI
50AQI
52AQI
54AQI
51AQI
55AQI
64AQI
69AQI
61AQI
57AQI
55AQI
53AQI
61AQI
58AQI
48AQI
57AQI
47AQI
51AQI
45AQI
47AQI
47AQI
46AQI
49AQI
52AQI
61AQI
57AQI
54AQI
66AQI
66AQI
67AQI
64AQI
60AQI
62AQI
61AQI
50AQI
51AQI
46AQI
49AQI
56AQI
57AQI
55AQI
59AQI
53AQI
41AQI
41AQI
39AQI
37AQI
40AQI
50AQI
44AQI
45AQI
45AQI
45AQI
47AQI
51AQI
48AQI
43AQI
50AQI
53AQI
45AQI
44AQI
48AQI
42AQI
51AQI
54AQI
45AQI
40AQI
38AQI
43AQI
48AQI
53AQI
51AQI
51AQI
50AQI
42AQI
43AQI
49AQI
52AQI
41AQI
36AQI
37AQI
31AQI
30AQI
29AQI
31AQI
33AQI
78AQI
61AQI
87AQI
69AQI
66AQI
67AQI
55AQI
49AQI
43AQI
No. of days
202564AQI
Highest AQI recorded in
March87AQI
Lowest AQI recorded in
September43AQI
202466AQI
Highest AQI recorded in
April79AQI
Lowest AQI recorded in
September51AQI
202371AQI
Highest AQI recorded in
March99AQI
Lowest AQI recorded in
September53AQI
202267AQI
Highest AQI recorded in
November84AQI
Lowest AQI recorded in
August36AQI
202166AQI
Highest AQI recorded in
May83AQI
Lowest AQI recorded in
September39AQI
Most & Least Polluted Years Over the Last 5 Years
Seohaean ro's annual 2025 AQI (64) shows an average percentage change of -4.4% (improved AQI) compared to previous years: 2021 (66), 2022 (67), 2023 (71), 2024 (66).