Ulsanhang, Ulsan, Ulsan, 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
Ulsanhang, Ulsan, Ulsan, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (21st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 53 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Aug - 22nd Aug 2025
Ulsanhang, Ulsan, Ulsan, South Korea
5 AM21st Aug 2025
7 PM
4 AM22nd Aug 2025
59AQI
52AQI
57AQI
48AQI
In the last 24 hours,
Ulsanhang's AQI reached its highest point of 59 at 10 AM during the Day, while the lowest point, 48, was recorded at 1 AM during the Night between 21st Aug and 22nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Ulsanhang, Ulsan, Ulsan, South Korea
28°C24/32°C
27°C23/32°C
27°C24/31°C
27°C24/31°C
27°C24/32°C
27°C23/33°C
27°C23/32°C
27°C23/32°C
27°C23/32°C
27°C23/33°C
28°C23/34°C
27°C25/31°C
29°C25/33°C
28°C25/33°C
28°C26/32°C
27°C22/32°C
25°C22/30°C
23°C19/30°C
24°C19/29°C
23°C20/27°C
20°C19/22°C
26°C22/31°C
28°C24/33°C
28°C25/32°C
29°C25/34°C
29°C24/34°C
28°C24/33°C
28°C25/33°C
28°C24/33°C
28°C24/33°C
--°C/°C
58AQI
52AQI
52AQI
50AQI
2025 Days Vs Air Quality
Ulsanhang, Ulsan, Ulsan, South Korea
14%
32
84%
196
2%
5
Total number of days with different AQI categories in last 234 days in 2025 (131 days remaining)
Under WHO’s Safe Air Quality Limits: 14%
Health Risk Level:
Extreme
In 2025, 14% of 234 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.
Annual Air Quality Insights
Ulsanhang, Ulsan, Ulsan, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
60AQI
67AQI
56AQI
54AQI
67AQI
98AQI
60AQI
68AQI
48AQI
56AQI
55AQI
66AQI
71AQI
92AQI
59AQI
64AQI
79AQI
82AQI
80AQI
108AQI
129AQI
127AQI
109AQI
93AQI
69AQI
60AQI
59AQI
55AQI
56AQI
61AQI
66AQI
67AQI
58AQI
61AQI
48AQI
52AQI
50AQI
59AQI
46AQI
49AQI
54AQI
67AQI
65AQI
60AQI
74AQI
59AQI
76AQI
53AQI
54AQI
50AQI
51AQI
54AQI
57AQI
53AQI
56AQI
54AQI
90AQI
78AQI
78AQI
78AQI
87AQI
53AQI
51AQI
40AQI
43AQI
52AQI
53AQI
70AQI
62AQI
85AQI
85AQI
66AQI
64AQI
47AQI
53AQI
58AQI
62AQI
74AQI
75AQI
89AQI
78AQI
100AQI
97AQI
122AQI
92AQI
86AQI
80AQI
61AQI
52AQI
68AQI
66AQI
55AQI
56AQI
69AQI
63AQI
66AQI
65AQI
78AQI
78AQI
85AQI
82AQI
78AQI
67AQI
60AQI
52AQI
70AQI
65AQI
86AQI
61AQI
62AQI
53AQI
65AQI
46AQI
72AQI
71AQI
64AQI
65AQI
68AQI
66AQI
74AQI
60AQI
56AQI
58AQI
52AQI
50AQI
54AQI
57AQI
61AQI
51AQI
46AQI
62AQI
65AQI
86AQI
84AQI
75AQI
73AQI
64AQI
62AQI
66AQI
59AQI
53AQI
58AQI
62AQI
44AQI
52AQI
58AQI
62AQI
64AQI
58AQI
57AQI
58AQI
71AQI
92AQI
78AQI
70AQI
64AQI
76AQI
70AQI
78AQI
67AQI
82AQI
70AQI
74AQI
71AQI
49AQI
65AQI
60AQI
64AQI
70AQI
71AQI
58AQI
49AQI
47AQI
55AQI
53AQI
60AQI
69AQI
75AQI
73AQI
70AQI
62AQI
62AQI
69AQI
71AQI
69AQI
66AQI
63AQI
70AQI
71AQI
59AQI
58AQI
57AQI
56AQI
54AQI
49AQI
58AQI
59AQI
59AQI
49AQI
45AQI
52AQI
49AQI
55AQI
67AQI
60AQI
48AQI
48AQI
42AQI
50AQI
46AQI
54AQI
51AQI
53AQI
60AQI
62AQI
57AQI
53AQI
52AQI
55AQI
55AQI
64AQI
49AQI
55AQI
43AQI
44AQI
45AQI
45AQI
46AQI
44AQI
52AQI
54AQI
51AQI
53AQI
73AQI
60AQI
70AQI
67AQI
60AQI
67AQI
57AQI
52AQI
No. of days
202564AQI
Highest AQI recorded in
January73AQI
Lowest AQI recorded in
August52AQI
202457AQI
Highest AQI recorded in
April75AQI
Lowest AQI recorded in
September42AQI
202366AQI
Highest AQI recorded in
March90AQI
Lowest AQI recorded in
August39AQI
202282AQI
Highest AQI recorded in
November106AQI
Lowest AQI recorded in
August57AQI
202171AQI
Highest AQI recorded in
April90AQI
Lowest AQI recorded in
September49AQI
Most & Least Polluted Years Over the Last 5 Years
Ulsanhang's annual 2025 AQI (64) shows an average percentage change of -5.8% (improved AQI) compared to previous years: 2021 (71), 2022 (82), 2023 (66), 2024 (57).