Chuo, Kisarazu, Chiba, 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
Chuo, Kisarazu, Chiba, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (24th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 29 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 26th Sep - 27th Sep 2025
Chuo, Kisarazu, Chiba, Japan
5 AM26th Sep 2025
5 PM
4 AM27th Sep 2025
AQI
AQI
86AQI
16AQI
In the last 24 hours,
Chuo's AQI reached its highest point of 86 at 2 PM during the Night, while the lowest point, 16, was recorded at 8 AM during the Night between 26th Sep and 27th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Chuo, Kisarazu, Chiba, Japan
27°C25/30°C
27°C25/29°C
28°C26/32°C
29°C27/32°C
28°C26/30°C
28°C27/30°C
28°C27/30°C
26°C25/26°C
25°C22/27°C
25°C23/29°C
26°C24/29°C
27°C26/30°C
28°C26/30°C
28°C27/30°C
27°C24/29°C
25°C24/27°C
26°C24/28°C
27°C27/29°C
27°C25/29°C
27°C25/29°C
27°C26/29°C
27°C23/30°C
22°C20/23°C
24°C22/26°C
26°C22/29°C
23°C20/25°C
22°C19/25°C
22°C20/25°C
23°C21/26°C
--°C/°C
--°C/°C
38AQI
35AQI
36AQI
34AQI
2025 Days Vs Air Quality
Chuo, Kisarazu, Chiba, Japan
89%
237
11%
30
Total number of days with different AQI categories in last 269 days in 2025 (96 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 269 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
Chuo, Kisarazu, Chiba, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
32AQI
26AQI
32AQI
33AQI
57AQI
31AQI
39AQI
31AQI
31AQI
30AQI
40AQI
31AQI
41AQI
39AQI
35AQI
31AQI
34AQI
54AQI
46AQI
43AQI
43AQI
52AQI
51AQI
43AQI
39AQI
35AQI
38AQI
33AQI
34AQI
29AQI
39AQI
32AQI
46AQI
30AQI
36AQI
29AQI
34AQI
31AQI
31AQI
33AQI
32AQI
32AQI
32AQI
30AQI
31AQI
39AQI
36AQI
32AQI
31AQI
30AQI
31AQI
31AQI
34AQI
33AQI
35AQI
35AQI
39AQI
48AQI
50AQI
62AQI
41AQI
40AQI
26AQI
34AQI
32AQI
35AQI
33AQI
35AQI
41AQI
53AQI
47AQI
42AQI
39AQI
27AQI
24AQI
24AQI
18AQI
26AQI
43AQI
48AQI
57AQI
56AQI
64AQI
84AQI
68AQI
52AQI
38AQI
44AQI
33AQI
30AQI
23AQI
22AQI
22AQI
24AQI
23AQI
30AQI
37AQI
30AQI
45AQI
38AQI
38AQI
26AQI
40AQI
29AQI
38AQI
44AQI
50AQI
57AQI
44AQI
44AQI
39AQI
29AQI
41AQI
35AQI
45AQI
45AQI
39AQI
38AQI
45AQI
41AQI
30AQI
32AQI
38AQI
35AQI
27AQI
25AQI
26AQI
28AQI
23AQI
30AQI
29AQI
37AQI
32AQI
37AQI
36AQI
28AQI
41AQI
42AQI
56AQI
35AQI
34AQI
37AQI
34AQI
30AQI
27AQI
27AQI
24AQI
28AQI
22AQI
17AQI
20AQI
27AQI
27AQI
29AQI
37AQI
43AQI
45AQI
52AQI
35AQI
29AQI
28AQI
40AQI
33AQI
29AQI
39AQI
37AQI
45AQI
43AQI
40AQI
33AQI
27AQI
20AQI
22AQI
22AQI
22AQI
21AQI
34AQI
32AQI
30AQI
35AQI
33AQI
37AQI
37AQI
37AQI
53AQI
68AQI
78AQI
77AQI
68AQI
50AQI
48AQI
51AQI
48AQI
39AQI
38AQI
36AQI
40AQI
33AQI
31AQI
30AQI
29AQI
27AQI
27AQI
29AQI
24AQI
25AQI
22AQI
24AQI
26AQI
28AQI
30AQI
38AQI
42AQI
43AQI
61AQI
48AQI
52AQI
50AQI
46AQI
49AQI
39AQI
37AQI
36AQI
35AQI
41AQI
38AQI
40AQI
38AQI
44AQI
44AQI
47AQI
48AQI
48AQI
48AQI
54AQI
53AQI
53AQI
51AQI
46AQI
51AQI
55AQI
52AQI
42AQI
35AQI
36AQI
39AQI
26AQI
28AQI
30AQI
38AQI
40AQI
36AQI
30AQI
30AQI
30AQI
34AQI
32AQI
32AQI
48AQI
46AQI
33AQI
34AQI
29AQI
28AQI
28AQI
29AQI
38AQI
34AQI
42AQI
36AQI
32AQI
33AQI
39AQI
46AQI
34AQI
No. of days
202537AQI
Highest AQI recorded in
August46AQI
Lowest AQI recorded in
May32AQI
202437AQI
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
September28AQI
202338AQI
Highest AQI recorded in
April44AQI
Lowest AQI recorded in
August23AQI
202238AQI
Highest AQI recorded in
March47AQI
Lowest AQI recorded in
August22AQI
202139AQI
Highest AQI recorded in
November45AQI
Lowest AQI recorded in
August35AQI
202035AQI
Highest AQI recorded in
November43AQI
Lowest AQI recorded in
September26AQI
Most & Least Polluted Years Over the Last 6 Years
Chuo's annual 2025 AQI (37) shows an average percentage change of 0.1% (worsened AQI) compared to previous years: 2020 (35), 2021 (39), 2022 (38), 2023 (38), 2024 (37).