Ogawa, Saitama, 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
Ogawa, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (10th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 40 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Ogawa, Saitama, Japan
4 AM12th Aug 2025
6 PM
3 AM13th Aug 2025
AQI
AQI
40AQI
20AQI
In the last 24 hours,
Ogawa's AQI reached its highest point of 40 at 5 AM during the Night, while the lowest point, undefined, was recorded at 3 AM during the Night between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Ogawa, Saitama, Japan
25°C23/28°C
27°C24/33°C
28°C24/34°C
27°C24/32°C
27°C23/34°C
28°C23/34°C
29°C23/36°C
30°C24/37°C
30°C25/37°C
30°C24/37°C
30°C24/37°C
30°C24/37°C
30°C24/38°C
30°C25/37°C
30°C25/37°C
31°C25/37°C
29°C24/36°C
28°C23/35°C
26°C23/31°C
30°C25/38°C
30°C25/37°C
32°C27/38°C
32°C26/39°C
31°C25/37°C
28°C25/32°C
27°C21/35°C
26°C21/32°C
23°C22/25°C
25°C24/27°C
--°C/°C
--°C/°C
46AQI
39AQI
46AQI
41AQI
2025 Days Vs Air Quality
Ogawa, Saitama, Japan
83%
185
17%
37
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2025, 83% of 224 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
Ogawa, Saitama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
28AQI
25AQI
26AQI
31AQI
53AQI
29AQI
36AQI
28AQI
28AQI
26AQI
34AQI
28AQI
30AQI
31AQI
28AQI
28AQI
30AQI
42AQI
35AQI
41AQI
36AQI
44AQI
47AQI
37AQI
37AQI
33AQI
41AQI
32AQI
34AQI
31AQI
42AQI
50AQI
43AQI
38AQI
36AQI
30AQI
30AQI
30AQI
29AQI
29AQI
30AQI
37AQI
33AQI
32AQI
31AQI
39AQI
37AQI
32AQI
31AQI
31AQI
32AQI
31AQI
33AQI
32AQI
35AQI
38AQI
44AQI
50AQI
54AQI
57AQI
40AQI
37AQI
26AQI
34AQI
32AQI
40AQI
38AQI
39AQI
47AQI
50AQI
52AQI
43AQI
40AQI
24AQI
22AQI
25AQI
18AQI
22AQI
35AQI
45AQI
54AQI
59AQI
71AQI
74AQI
71AQI
58AQI
36AQI
37AQI
32AQI
29AQI
21AQI
24AQI
19AQI
31AQI
24AQI
31AQI
39AQI
27AQI
47AQI
41AQI
42AQI
32AQI
28AQI
25AQI
27AQI
44AQI
55AQI
67AQI
68AQI
42AQI
56AQI
33AQI
40AQI
44AQI
49AQI
50AQI
56AQI
38AQI
49AQI
44AQI
34AQI
31AQI
39AQI
35AQI
34AQI
24AQI
34AQI
34AQI
24AQI
22AQI
23AQI
34AQI
42AQI
42AQI
49AQI
32AQI
46AQI
45AQI
59AQI
67AQI
59AQI
52AQI
50AQI
31AQI
32AQI
31AQI
30AQI
38AQI
28AQI
22AQI
21AQI
33AQI
32AQI
28AQI
40AQI
46AQI
52AQI
61AQI
55AQI
41AQI
32AQI
41AQI
49AQI
43AQI
32AQI
41AQI
50AQI
44AQI
50AQI
50AQI
42AQI
29AQI
31AQI
32AQI
26AQI
26AQI
34AQI
36AQI
44AQI
49AQI
51AQI
45AQI
50AQI
48AQI
52AQI
57AQI
76AQI
78AQI
78AQI
61AQI
47AQI
52AQI
53AQI
40AQI
37AQI
41AQI
39AQI
39AQI
38AQI
39AQI
43AQI
47AQI
52AQI
51AQI
51AQI
51AQI
46AQI
51AQI
49AQI
38AQI
40AQI
36AQI
41AQI
45AQI
57AQI
50AQI
49AQI
39AQI
37AQI
41AQI
40AQI
33AQI
35AQI
42AQI
39AQI
38AQI
40AQI
50AQI
44AQI
No. of days
202540AQI
Highest AQI recorded in
July50AQI
Lowest AQI recorded in
January33AQI
202436AQI
Highest AQI recorded in
April50AQI
Lowest AQI recorded in
September28AQI
202340AQI
Highest AQI recorded in
April51AQI
Lowest AQI recorded in
August32AQI
202238AQI
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
December29AQI
202137AQI
Highest AQI recorded in
June44AQI
Lowest AQI recorded in
October30AQI
202036AQI
Highest AQI recorded in
August52AQI
Lowest AQI recorded in
September23AQI
Most & Least Polluted Years Over the Last 6 Years
Ogawa's annual 2025 AQI (40) shows an average percentage change of 6.9% (worsened AQI) compared to previous years: 2020 (36), 2021 (37), 2022 (38), 2023 (40), 2024 (36).