Submerged, Aizawa, Kanagawa, Japan 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
Submerged, Aizawa, Kanagawa, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (22nd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 30 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Submerged, Aizawa, Kanagawa, Japan
5 AM22nd Sep 2025
6 PM
4 AM23rd Sep 2025
36AQI
16AQI
37AQI
25AQI
In the last 24 hours,
Submerged's AQI reached its highest point of 37 at 2 AM during the Night, while the lowest point, 16, was recorded at 10 AM during the Day between 22nd Sep and 23rd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Submerged, Aizawa, Kanagawa, Japan
31°C28/36°C
30°C27/35°C
30°C27/33°C
30°C26/35°C
29°C26/32°C
28°C25/32°C
31°C27/35°C
31°C27/36°C
30°C26/35°C
30°C27/36°C
30°C27/35°C
26°C25/26°C
24°C22/26°C
26°C23/29°C
27°C24/31°C
29°C25/34°C
29°C27/32°C
29°C26/32°C
27°C23/31°C
25°C23/26°C
26°C24/30°C
29°C26/33°C
28°C26/30°C
28°C26/31°C
29°C25/34°C
29°C24/36°C
22°C21/23°C
23°C22/24°C
26°C22/31°C
23°C21/26°C
--°C/°C
42AQI
40AQI
42AQI
39AQI
2025 Days Vs Air Quality
Submerged, Aizawa, Kanagawa, Japan
92%
245
8%
20
Total number of days with different AQI categories in last 266 days in 2025 (99 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 266 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Submerged, Aizawa, Kanagawa, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI
28AQI
23AQI
25AQI
22AQI
47AQI
32AQI
36AQI
31AQI
26AQI
25AQI
25AQI
28AQI
25AQI
29AQI
22AQI
24AQI
25AQI
27AQI
27AQI
31AQI
33AQI
38AQI
37AQI
35AQI
32AQI
31AQI
29AQI
29AQI
27AQI
25AQI
23AQI
23AQI
28AQI
27AQI
29AQI
28AQI
28AQI
29AQI
28AQI
27AQI
28AQI
28AQI
28AQI
27AQI
27AQI
31AQI
33AQI
29AQI
28AQI
28AQI
29AQI
27AQI
32AQI
29AQI
33AQI
32AQI
37AQI
40AQI
54AQI
43AQI
38AQI
30AQI
26AQI
26AQI
29AQI
30AQI
33AQI
33AQI
31AQI
29AQI
34AQI
24AQI
21AQI
16AQI
17AQI
15AQI
14AQI
16AQI
23AQI
26AQI
30AQI
34AQI
48AQI
61AQI
56AQI
36AQI
30AQI
30AQI
29AQI
20AQI
21AQI
19AQI
19AQI
19AQI
14AQI
16AQI
19AQI
19AQI
23AQI
22AQI
21AQI
19AQI
22AQI
19AQI
18AQI
26AQI
30AQI
34AQI
29AQI
24AQI
23AQI
15AQI
17AQI
19AQI
22AQI
22AQI
20AQI
16AQI
19AQI
19AQI
17AQI
16AQI
18AQI
17AQI
17AQI
15AQI
16AQI
16AQI
14AQI
15AQI
16AQI
18AQI
17AQI
19AQI
20AQI
18AQI
21AQI
22AQI
52AQI
37AQI
33AQI
27AQI
24AQI
20AQI
20AQI
22AQI
16AQI
18AQI
15AQI
14AQI
14AQI
16AQI
16AQI
16AQI
19AQI
20AQI
33AQI
27AQI
25AQI
23AQI
21AQI
22AQI
21AQI
18AQI
21AQI
21AQI
27AQI
24AQI
25AQI
23AQI
20AQI
12AQI
13AQI
14AQI
17AQI
15AQI
21AQI
18AQI
23AQI
39AQI
41AQI
46AQI
48AQI
47AQI
50AQI
60AQI
77AQI
76AQI
74AQI
56AQI
47AQI
55AQI
49AQI
40AQI
38AQI
40AQI
42AQI
36AQI
31AQI
32AQI
34AQI
35AQI
40AQI
43AQI
39AQI
39AQI
34AQI
34AQI
41AQI
34AQI
37AQI
35AQI
43AQI
47AQI
62AQI
53AQI
51AQI
47AQI
42AQI
45AQI
34AQI
36AQI
35AQI
33AQI
39AQI
41AQI
43AQI
42AQI
44AQI
47AQI
49AQI
50AQI
50AQI
49AQI
56AQI
58AQI
56AQI
52AQI
49AQI
53AQI
56AQI
54AQI
44AQI
39AQI
38AQI
32AQI
28AQI
30AQI
30AQI
40AQI
42AQI
38AQI
31AQI
33AQI
31AQI
43AQI
35AQI
41AQI
50AQI
49AQI
35AQI
32AQI
29AQI
30AQI
29AQI
29AQI
31AQI
21AQI
20AQI
21AQI
45AQI
47AQI
36AQI
No. of days
202531AQI
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
May20AQI
202430AQI
Highest AQI recorded in
June40AQI
Lowest AQI recorded in
October24AQI
202328AQI
Highest AQI recorded in
April36AQI
Lowest AQI recorded in
August20AQI
202232AQI
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
August13AQI
202127AQI
Highest AQI recorded in
June36AQI
Lowest AQI recorded in
January14AQI
202026AQI
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
September14AQI
Most & Least Polluted Years Over the Last 6 Years
Submerged's annual 2025 AQI (31) shows an average percentage change of 7.8% (worsened AQI) compared to previous years: 2020 (26), 2021 (27), 2022 (32), 2023 (28), 2024 (30).