Sapgyo eup, Hongseong, Chungnam, 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
Sapgyo eup, Hongseong, Chungnam, South Korea
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 3rd highest AQI at 43 of Good air quality, showing improvement over 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 30th Sep - 1st Oct 2025
Sapgyo eup, Hongseong, Chungnam, South Korea
6 AM30th Sep 2025
6 PM
5 AM1st Oct 2025
AQI
AQI
75AQI
47AQI
In the last 24 hours,
Sapgyo eup's AQI reached its highest point of 75 at 11 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 30th Sep and 1st Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Sapgyo eup, Hongseong, Chungnam, South Korea
26°C23/28°C
24°C21/28°C
25°C20/30°C
23°C22/25°C
26°C22/30°C
26°C24/29°C
25°C21/28°C
23°C20/28°C
23°C20/26°C
23°C19/28°C
24°C19/29°C
22°C20/24°C
24°C21/27°C
24°C21/27°C
24°C20/29°C
25°C22/28°C
23°C21/25°C
22°C19/26°C
18°C16/19°C
19°C17/23°C
20°C17/24°C
21°C18/24°C
21°C19/24°C
21°C19/24°C
21°C19/24°C
21°C18/25°C
21°C18/26°C
20°C19/21°C
20°C17/23°C
--°C/°C
--°C/°C
45AQI
40AQI
48AQI
43AQI
2025 Days Vs Air Quality
Sapgyo eup, Hongseong, Chungnam, South Korea
28%
77
66%
179
6%
16
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 28%
Health Risk Level:
Very high
In 2025, 28% of 273 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
Sapgyo eup, Hongseong, Chungnam, South Korea
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
71AQI
67AQI
59AQI
60AQI
66AQI
77AQI
56AQI
60AQI
39AQI
61AQI
66AQI
83AQI
89AQI
91AQI
55AQI
64AQI
75AQI
77AQI
79AQI
119AQI
131AQI
137AQI
115AQI
122AQI
89AQI
65AQI
65AQI
53AQI
54AQI
63AQI
85AQI
102AQI
105AQI
56AQI
47AQI
48AQI
52AQI
44AQI
44AQI
51AQI
59AQI
80AQI
69AQI
52AQI
77AQI
58AQI
110AQI
49AQI
58AQI
46AQI
51AQI
53AQI
56AQI
51AQI
50AQI
52AQI
74AQI
63AQI
84AQI
114AQI
86AQI
56AQI
46AQI
41AQI
77AQI
89AQI
86AQI
114AQI
110AQI
105AQI
99AQI
88AQI
86AQI
57AQI
72AQI
64AQI
81AQI
80AQI
94AQI
100AQI
110AQI
119AQI
118AQI
131AQI
99AQI
91AQI
55AQI
49AQI
49AQI
63AQI
77AQI
82AQI
88AQI
83AQI
79AQI
66AQI
75AQI
74AQI
68AQI
74AQI
81AQI
65AQI
64AQI
42AQI
60AQI
61AQI
69AQI
88AQI
51AQI
71AQI
61AQI
48AQI
47AQI
72AQI
57AQI
52AQI
38AQI
57AQI
63AQI
55AQI
57AQI
51AQI
54AQI
45AQI
51AQI
49AQI
53AQI
63AQI
52AQI
62AQI
70AQI
71AQI
74AQI
72AQI
58AQI
53AQI
43AQI
59AQI
59AQI
38AQI
51AQI
55AQI
59AQI
54AQI
49AQI
65AQI
70AQI
75AQI
82AQI
85AQI
93AQI
91AQI
100AQI
77AQI
61AQI
56AQI
59AQI
68AQI
61AQI
66AQI
56AQI
56AQI
60AQI
66AQI
57AQI
60AQI
62AQI
61AQI
64AQI
65AQI
53AQI
53AQI
54AQI
58AQI
60AQI
48AQI
51AQI
62AQI
57AQI
50AQI
49AQI
46AQI
50AQI
53AQI
51AQI
50AQI
52AQI
58AQI
62AQI
54AQI
53AQI
53AQI
53AQI
62AQI
59AQI
49AQI
55AQI
45AQI
49AQI
42AQI
46AQI
45AQI
41AQI
49AQI
54AQI
64AQI
59AQI
52AQI
60AQI
63AQI
64AQI
60AQI
58AQI
63AQI
61AQI
54AQI
52AQI
51AQI
50AQI
52AQI
54AQI
55AQI
55AQI
51AQI
42AQI
39AQI
38AQI
36AQI
39AQI
50AQI
47AQI
47AQI
50AQI
49AQI
47AQI
51AQI
46AQI
42AQI
50AQI
52AQI
45AQI
42AQI
45AQI
41AQI
44AQI
51AQI
47AQI
38AQI
37AQI
40AQI
48AQI
50AQI
50AQI
51AQI
50AQI
40AQI
41AQI
48AQI
44AQI
39AQI
44AQI
37AQI
33AQI
32AQI
30AQI
31AQI
31AQI
45AQI
68AQI
61AQI
55AQI
43AQI
77AQI
62AQI
85AQI
66AQI
60AQI
61AQI
53AQI
49AQI
44AQI
No. of days
202562AQI
Highest AQI recorded in
March85AQI
Lowest AQI recorded in
September44AQI
202467AQI
Highest AQI recorded in
January83AQI
Lowest AQI recorded in
July46AQI
202373AQI
Highest AQI recorded in
February97AQI
Lowest AQI recorded in
August55AQI
202278AQI
Highest AQI recorded in
November91AQI
Lowest AQI recorded in
September61AQI
Most & Least Polluted Years Over the Last 4 Years
Sapgyo eup's annual 2025 AQI (62) shows an average percentage change of -14.3% (improved AQI) compared to previous years: 2022 (78), 2023 (73), 2024 (67).