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!
February Air Quality Analysis
Katsushika, Matsudo, Chiba, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (17th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 19 of Good air quality, showing improvement over 2025, 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 16th Feb - 17th Feb 2026
Katsushika, Matsudo, Chiba, Japan
6 AM16th Feb 2026
5 PM
5 AM17th Feb 2026
62AQI
23AQI
58AQI
17AQI
In the last 24 hours,
Katsushika's AQI reached its highest point of 62 at 8 AM during the Day, while the lowest point, 17, was recorded at 3 AM during the Night between 16th Feb and 17th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Katsushika, Matsudo, Chiba, Japan
7°C6/9°C
7°C3/11°C
4°C2/6°C
3°C2/5°C
4°C1/7°C
6°C3/10°C
4°C2/6°C
4°C1/7°C
6°C3/8°C
6°C3/9°C
5°C3/8°C
4°C2/7°C
5°C2/8°C
6°C3/9°C
7°C4/9°C
6°C4/9°C
7°C4/10°C
9°C6/12°C
10°C7/14°C
3°C1/4°C
0°C-2/1°C
2°C-2/6°C
6°C2/11°C
7°C5/8°C
7°C5/10°C
7°C5/10°C
10°C6/14°C
12°C9/16°C
10°C4/11°C
6°C4/9°C
47AQI
35AQI
49AQI
32AQI
2026 Days Vs Air Quality
Katsushika, Matsudo, Chiba, Japan
79%
38
21%
10
Total number of days with different AQI categories in last 49 days in 2026 (316 days remaining)
Under WHO’s Safe Air Quality Limits: 79%
Health Risk Level:
Low
In 2026, 79% of 49 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)
36AQI (US)
43AQI (US)
No. of days
202639AQI (US)
Highest AQI (US) recorded in
February43AQI (US)
Lowest AQI (US) recorded in
January36AQI (US)
202537AQI (US)
Highest AQI (US) recorded in
December56AQI (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) (39) shows an average percentage change of 49.1% (worsened AQI (US)) compared to previous years: 2020 (15), 2021 (25), 2022 (31), 2023 (30), 2024 (32), 2025 (37).