Ochikawa, Kunitachi, Tokyo, 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
Ochikawa, Kunitachi, Tokyo, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (18th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 48 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Sep - 19th Sep 2025
Ochikawa, Kunitachi, Tokyo, Japan
5 AM18th Sep 2025
6 PM
4 AM19th Sep 2025
72AQI
42AQI
49AQI
22AQI
In the last 24 hours,
Ochikawa's AQI reached its highest point of 72 at 12 PM during the Day, while the lowest point, 22, was recorded at 7 PM during the Night between 18th Sep and 19th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Ochikawa, Kunitachi, Tokyo, Japan
31°C27/36°C
31°C27/36°C
30°C27/35°C
32°C28/36°C
32°C29/37°C
31°C28/36°C
30°C28/34°C
31°C27/36°C
29°C26/32°C
29°C26/34°C
32°C28/36°C
32°C29/36°C
31°C28/36°C
32°C28/37°C
30°C28/36°C
26°C26/26°C
24°C23/25°C
26°C23/31°C
28°C24/32°C
30°C26/35°C
30°C27/33°C
29°C27/31°C
27°C24/30°C
24°C23/26°C
26°C24/30°C
28°C26/32°C
29°C26/32°C
29°C27/32°C
30°C26/35°C
30°C24/36°C
--°C/°C
45AQI
41AQI
44AQI
39AQI
2025 Days Vs Air Quality
Ochikawa, Kunitachi, Tokyo, Japan
92%
240
8%
21
Total number of days with different AQI categories in last 262 days in 2025 (103 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 262 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
Ochikawa, Kunitachi, Tokyo, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
25AQI
25AQI
24AQI
25AQI
23AQI
25AQI
24AQI
27AQI
25AQI
24AQI
24AQI
27AQI
27AQI
26AQI
28AQI
24AQI
27AQI
26AQI
29AQI
28AQI
30AQI
29AQI
30AQI
33AQI
31AQI
31AQI
25AQI
30AQI
26AQI
26AQI
26AQI
28AQI
32AQI
27AQI
28AQI
27AQI
26AQI
26AQI
27AQI
27AQI
26AQI
27AQI
27AQI
31AQI
27AQI
28AQI
29AQI
31AQI
28AQI
29AQI
28AQI
29AQI
29AQI
30AQI
32AQI
31AQI
32AQI
36AQI
35AQI
40AQI
39AQI
32AQI
30AQI
28AQI
30AQI
31AQI
31AQI
33AQI
31AQI
31AQI
32AQI
38AQI
24AQI
22AQI
17AQI
16AQI
15AQI
14AQI
16AQI
23AQI
25AQI
27AQI
29AQI
49AQI
59AQI
56AQI
37AQI
30AQI
35AQI
28AQI
23AQI
20AQI
18AQI
18AQI
18AQI
14AQI
15AQI
18AQI
17AQI
21AQI
21AQI
20AQI
18AQI
21AQI
19AQI
18AQI
24AQI
28AQI
31AQI
25AQI
22AQI
21AQI
15AQI
16AQI
16AQI
20AQI
21AQI
19AQI
14AQI
19AQI
18AQI
16AQI
15AQI
21AQI
17AQI
17AQI
14AQI
16AQI
16AQI
14AQI
15AQI
15AQI
18AQI
17AQI
19AQI
20AQI
17AQI
22AQI
23AQI
45AQI
54AQI
35AQI
29AQI
24AQI
18AQI
18AQI
17AQI
15AQI
18AQI
15AQI
13AQI
15AQI
16AQI
16AQI
16AQI
20AQI
21AQI
23AQI
29AQI
23AQI
21AQI
20AQI
22AQI
22AQI
19AQI
19AQI
20AQI
27AQI
23AQI
25AQI
22AQI
19AQI
12AQI
13AQI
14AQI
15AQI
14AQI
19AQI
17AQI
20AQI
37AQI
41AQI
45AQI
45AQI
48AQI
51AQI
58AQI
76AQI
79AQI
79AQI
60AQI
50AQI
54AQI
52AQI
43AQI
41AQI
41AQI
42AQI
38AQI
35AQI
35AQI
39AQI
40AQI
46AQI
44AQI
41AQI
40AQI
36AQI
41AQI
43AQI
34AQI
36AQI
34AQI
43AQI
46AQI
62AQI
53AQI
51AQI
46AQI
48AQI
49AQI
37AQI
37AQI
35AQI
33AQI
36AQI
35AQI
37AQI
40AQI
42AQI
46AQI
47AQI
49AQI
50AQI
49AQI
57AQI
57AQI
55AQI
51AQI
47AQI
53AQI
55AQI
54AQI
43AQI
38AQI
38AQI
34AQI
29AQI
29AQI
31AQI
38AQI
42AQI
37AQI
31AQI
31AQI
28AQI
36AQI
39AQI
39AQI
49AQI
48AQI
27AQI
29AQI
31AQI
20AQI
20AQI
20AQI
47AQI
46AQI
37AQI
No. of days
202530AQI
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
April20AQI
202428AQI
Highest AQI recorded in
July39AQI
Lowest AQI recorded in
December24AQI
202328AQI
Highest AQI recorded in
April37AQI
Lowest AQI recorded in
October25AQI
202227AQI
Highest AQI recorded in
July31AQI
Lowest AQI recorded in
August22AQI
202123AQI
Highest AQI recorded in
May34AQI
Lowest AQI recorded in
February13AQI
202015AQI
Highest AQI recorded in
August24AQI
Lowest AQI recorded in
May11AQI
Most & Least Polluted Years Over the Last 6 Years
Ochikawa's annual 2025 AQI (30) shows an average percentage change of 32.1% (worsened AQI) compared to previous years: 2020 (15), 2021 (23), 2022 (27), 2023 (28), 2024 (28).