Siheung, 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!
August Air Quality Analysis
Siheung, Ansan, Gyeonggi, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (14th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 29 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 14th Aug - 15th Aug 2026
Siheung, Ansan, Gyeonggi, South Korea
5 AM14th Aug 2026
7 PM
4 AM15th Aug 2026
40AQI
21AQI
52AQI
29AQI
In the last 24 hours,
Siheung's AQI reached its highest point of 52 at 2 AM during the Night, while the lowest point, 21, was recorded at 12 PM during the Day between 14th Aug and 15th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Siheung, Ansan, Gyeonggi, South Korea
25°C22/30°C
23°C21/24°C
23°C22/23°C
24°C23/26°C
24°C24/26°C
25°C23/27°C
25°C24/27°C
27°C24/30°C
27°C24/30°C
27°C24/30°C
27°C24/31°C
27°C24/30°C
26°C24/30°C
26°C23/30°C
27°C24/31°C
28°C25/31°C
28°C25/32°C
30°C26/34°C
31°C27/35°C
30°C27/34°C
31°C28/35°C
32°C28/36°C
30°C24/34°C
26°C22/32°C
27°C23/31°C
27°C23/33°C
25°C20/31°C
26°C22/31°C
26°C23/30°C
25°C24/26°C
44AQI
34AQI
43AQI
36AQI
2026 Days Vs Air Quality
Siheung, Ansan, Gyeonggi, South Korea
52%
116
39%
87
9%
20
Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)
Under WHO’s Safe Air Quality Limits: 52%
Health Risk Level:
Considerable
In 2026, 52% of 227 days were within WHO’s safe air quality limits, and 48% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.
Annual Air Quality Insights
Siheung, Ansan, Gyeonggi, South Korea
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
22AQI (US)
36AQI (US)
50AQI (US)
73AQI (US)
44AQI (US)
44AQI (US)
56AQI (US)
23AQI (US)
38AQI (US)
58AQI (US)
20AQI (US)
36AQI (US)
35AQI (US)
24AQI (US)
85AQI (US)
128AQI (US)
113AQI (US)
79AQI (US)
54AQI (US)
28AQI (US)
32AQI (US)
24AQI (US)
50AQI (US)
49AQI (US)
20AQI (US)
49AQI (US)
51AQI (US)
28AQI (US)
37AQI (US)
56AQI (US)
50AQI (US)
53AQI (US)
63AQI (US)
52AQI (US)
105AQI (US)
115AQI (US)
66AQI (US)
36AQI (US)
50AQI (US)
44AQI (US)
85AQI (US)
123AQI (US)
110AQI (US)
135AQI (US)
143AQI (US)
110AQI (US)
45AQI (US)
46AQI (US)
42AQI (US)
37AQI (US)
66AQI (US)
88AQI (US)
50AQI (US)
30AQI (US)
34AQI (US)
56AQI (US)
42AQI (US)
28AQI (US)
39AQI (US)
36AQI (US)
13AQI (US)
18AQI (US)
59AQI (US)
93AQI (US)
67AQI (US)
37AQI (US)
48AQI (US)
93AQI (US)
76AQI (US)
77AQI (US)
101AQI (US)
41AQI (US)
53AQI (US)
93AQI (US)
128AQI (US)
143AQI (US)
99AQI (US)
44AQI (US)
53AQI (US)
94AQI (US)
88AQI (US)
105AQI (US)
101AQI (US)
86AQI (US)
94AQI (US)
124AQI (US)
111AQI (US)
102AQI (US)
92AQI (US)
65AQI (US)
79AQI (US)
95AQI (US)
120AQI (US)
58AQI (US)
81AQI (US)
59AQI (US)
25AQI (US)
41AQI (US)
37AQI (US)
44AQI (US)
74AQI (US)
87AQI (US)
70AQI (US)
89AQI (US)
128AQI (US)
60AQI (US)
61AQI (US)
77AQI (US)
67AQI (US)
68AQI (US)
49AQI (US)
37AQI (US)
54AQI (US)
54AQI (US)
52AQI (US)
35AQI (US)
30AQI (US)
48AQI (US)
43AQI (US)
108AQI (US)
46AQI (US)
23AQI (US)
41AQI (US)
27AQI (US)
40AQI (US)
40AQI (US)
30AQI (US)
34AQI (US)
37AQI (US)
43AQI (US)
55AQI (US)
86AQI (US)
77AQI (US)
65AQI (US)
56AQI (US)
53AQI (US)
64AQI (US)
67AQI (US)
80AQI (US)
72AQI (US)
71AQI (US)
65AQI (US)
49AQI (US)
36AQI (US)
34AQI (US)
60AQI (US)
68AQI (US)
53AQI (US)
48AQI (US)
63AQI (US)
76AQI (US)
75AQI (US)
21AQI (US)
44AQI (US)
26AQI (US)
34AQI (US)
26AQI (US)
60AQI (US)
56AQI (US)
46AQI (US)
51AQI (US)
56AQI (US)
58AQI (US)
74AQI (US)
79AQI (US)
52AQI (US)
63AQI (US)
22AQI (US)
16AQI (US)
37AQI (US)
42AQI (US)
17AQI (US)
27AQI (US)
35AQI (US)
61AQI (US)
45AQI (US)
57AQI (US)
52AQI (US)
57AQI (US)
48AQI (US)
35AQI (US)
51AQI (US)
33AQI (US)
48AQI (US)
39AQI (US)
24AQI (US)
23AQI (US)
28AQI (US)
31AQI (US)
29AQI (US)
29AQI (US)
28AQI (US)
39AQI (US)
60AQI (US)
65AQI (US)
37AQI (US)
32AQI (US)
34AQI (US)
32AQI (US)
40AQI (US)
53AQI (US)
49AQI (US)
31AQI (US)
27AQI (US)
31AQI (US)
43AQI (US)
26AQI (US)
23AQI (US)
36AQI (US)
66AQI (US)
32AQI (US)
50AQI (US)
67AQI (US)
50AQI (US)
50AQI (US)
69AQI (US)
34AQI (US)
12AQI (US)
26AQI (US)
27AQI (US)
36AQI (US)
28AQI (US)
29AQI (US)
48AQI (US)
68AQI (US)
79AQI (US)
64AQI (US)
54AQI (US)
47AQI (US)
37AQI (US)
41AQI (US)
No. of days
202656AQI (US)
Highest AQI (US) recorded in
March79AQI (US)
Lowest AQI (US) recorded in
July37AQI (US)
202559AQI (US)
Highest AQI (US) recorded in
March80AQI (US)
Lowest AQI (US) recorded in
September41AQI (US)
202464AQI (US)
Highest AQI (US) recorded in
April86AQI (US)
Lowest AQI (US) recorded in
September40AQI (US)
202374AQI (US)
Highest AQI (US) recorded in
March97AQI (US)
Lowest AQI (US) recorded in
September57AQI (US)
202270AQI (US)
Highest AQI (US) recorded in
February109AQI (US)
Lowest AQI (US) recorded in
August32AQI (US)
202181AQI (US)
Highest AQI (US) recorded in
March100AQI (US)
Lowest AQI (US) recorded in
April68AQI (US)
202066AQI (US)
Highest AQI (US) recorded in
December79AQI (US)
Lowest AQI (US) recorded in
September52AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Siheung's annual 2026 AQI (US) (56) shows an average percentage change of -17.9% (improved AQI (US)) compared to previous years: 2020 (66), 2021 (81), 2022 (70), 2023 (74), 2024 (64), 2025 (59).