Katsushika, Matsudo, Chiba, Japan 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
Katsushika, Matsudo, Chiba, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (15th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 27 of Good air quality, showing improvement over 2025 and 2023 on the same day.
Day & Night AQI Trend: 14th Aug - 15th Aug 2026
Katsushika, Matsudo, Chiba, Japan
4 AM14th Aug 2026
6 PM
3 AM15th Aug 2026
31AQI
16AQI
38AQI
21AQI
In the last 24 hours,
Katsushika's AQI reached its highest point of 38 at 8 PM during the Night, while the lowest point, 16, was recorded at 12 PM during the Day between 14th Aug and 15th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Katsushika, Matsudo, Chiba, Japan
29°C27/32°C
28°C26/31°C
28°C25/32°C
30°C26/35°C
32°C28/36°C
32°C28/36°C
32°C29/38°C
30°C27/34°C
29°C25/35°C
28°C25/32°C
27°C24/30°C
27°C24/31°C
30°C25/36°C
32°C28/36°C
31°C29/36°C
32°C27/37°C
30°C25/35°C
25°C24/27°C
26°C22/30°C
27°C23/31°C
29°C26/34°C
30°C27/34°C
30°C26/34°C
29°C26/34°C
27°C24/31°C
24°C21/28°C
23°C22/26°C
27°C23/31°C
26°C24/29°C
27°C24/32°C
42AQI
28AQI
38AQI
30AQI
2026 Days Vs Air Quality
Katsushika, Matsudo, Chiba, Japan
85%
194
15%
33
Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2026, 85% of 227 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Katsushika, Matsudo, Chiba, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
22AQI (US)
27AQI (US)
24AQI (US)
35AQI (US)
57AQI (US)
24AQI (US)
40AQI (US)
47AQI (US)
21AQI (US)
47AQI (US)
40AQI (US)
28AQI (US)
45AQI (US)
20AQI (US)
35AQI (US)
56AQI (US)
60AQI (US)
33AQI (US)
49AQI (US)
55AQI (US)
18AQI (US)
26AQI (US)
40AQI (US)
42AQI (US)
44AQI (US)
24AQI (US)
46AQI (US)
24AQI (US)
20AQI (US)
38AQI (US)
37AQI (US)
40AQI (US)
48AQI (US)
28AQI (US)
40AQI (US)
63AQI (US)
62AQI (US)
14AQI (US)
12AQI (US)
36AQI (US)
41AQI (US)
61AQI (US)
31AQI (US)
50AQI (US)
65AQI (US)
72AQI (US)
53AQI (US)
19AQI (US)
40AQI (US)
22AQI (US)
27AQI (US)
48AQI (US)
50AQI (US)
48AQI (US)
40AQI (US)
34AQI (US)
16AQI (US)
27AQI (US)
24AQI (US)
20AQI (US)
52AQI (US)
44AQI (US)
41AQI (US)
13AQI (US)
23AQI (US)
41AQI (US)
33AQI (US)
42AQI (US)
56AQI (US)
56AQI (US)
64AQI (US)
37AQI (US)
45AQI (US)
55AQI (US)
48AQI (US)
47AQI (US)
50AQI (US)
40AQI (US)
29AQI (US)
57AQI (US)
49AQI (US)
50AQI (US)
49AQI (US)
62AQI (US)
30AQI (US)
27AQI (US)
50AQI (US)
50AQI (US)
55AQI (US)
29AQI (US)
27AQI (US)
33AQI (US)
45AQI (US)
46AQI (US)
38AQI (US)
30AQI (US)
27AQI (US)
30AQI (US)
33AQI (US)
43AQI (US)
47AQI (US)
32AQI (US)
41AQI (US)
40AQI (US)
38AQI (US)
33AQI (US)
35AQI (US)
31AQI (US)
32AQI (US)
32AQI (US)
37AQI (US)
47AQI (US)
40AQI (US)
32AQI (US)
45AQI (US)
52AQI (US)
49AQI (US)
43AQI (US)
39AQI (US)
36AQI (US)
47AQI (US)
50AQI (US)
51AQI (US)
36AQI (US)
21AQI (US)
29AQI (US)
30AQI (US)
25AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
32AQI (US)
38AQI (US)
32AQI (US)
35AQI (US)
86AQI (US)
69AQI (US)
53AQI (US)
49AQI (US)
61AQI (US)
60AQI (US)
61AQI (US)
52AQI (US)
59AQI (US)
46AQI (US)
39AQI (US)
24AQI (US)
25AQI (US)
24AQI (US)
22AQI (US)
27AQI (US)
30AQI (US)
23AQI (US)
13AQI (US)
23AQI (US)
22AQI (US)
21AQI (US)
22AQI (US)
20AQI (US)
23AQI (US)
22AQI (US)
24AQI (US)
24AQI (US)
35AQI (US)
44AQI (US)
12AQI (US)
23AQI (US)
23AQI (US)
25AQI (US)
25AQI (US)
22AQI (US)
20AQI (US)
19AQI (US)
21AQI (US)
22AQI (US)
26AQI (US)
30AQI (US)
24AQI (US)
26AQI (US)
25AQI (US)
23AQI (US)
33AQI (US)
21AQI (US)
15AQI (US)
38AQI (US)
22AQI (US)
25AQI (US)
26AQI (US)
24AQI (US)
22AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
35AQI (US)
42AQI (US)
47AQI (US)
69AQI (US)
51AQI (US)
20AQI (US)
16AQI (US)
31AQI (US)
47AQI (US)
68AQI (US)
64AQI (US)
41AQI (US)
30AQI (US)
24AQI (US)
24AQI (US)
30AQI (US)
30AQI (US)
35AQI (US)
47AQI (US)
58AQI (US)
50AQI (US)
20AQI (US)
29AQI (US)
27AQI (US)
23AQI (US)
31AQI (US)
45AQI (US)
33AQI (US)
31AQI (US)
36AQI (US)
27AQI (US)
25AQI (US)
24AQI (US)
27AQI (US)
36AQI (US)
40AQI (US)
43AQI (US)
38AQI (US)
41AQI (US)
24AQI (US)
34AQI (US)
32AQI (US)
No. of days
202636AQI (US)
Highest AQI (US) recorded in
March43AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202537AQI (US)
Highest AQI (US) recorded in
November56AQI (US)
Lowest AQI (US) recorded in
May18AQI (US)
202432AQI (US)
Highest AQI (US) recorded in
July39AQI (US)
Lowest AQI (US) recorded in
September25AQI (US)
202330AQI (US)
Highest AQI (US) recorded in
April42AQI (US)
Lowest AQI (US) recorded in
August18AQI (US)
202231AQI (US)
Highest AQI (US) recorded in
April37AQI (US)
Lowest AQI (US) recorded in
August21AQI (US)
202125AQI (US)
Highest AQI (US) recorded in
August27AQI (US)
Lowest AQI (US) recorded in
November23AQI (US)
202015AQI (US)
Highest AQI (US) recorded in
August20AQI (US)
Lowest AQI (US) recorded in
September10AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Katsushika's annual 2026 AQI (US) (36) shows an average percentage change of 38.3% (worsened AQI (US)) compared to previous years: 2020 (15), 2021 (25), 2022 (31), 2023 (30), 2024 (32), 2025 (37).