Kounodai, Iwata, Shizuoka, 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
Kounodai, Iwata, Shizuoka, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (20th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 46 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Aug - 22nd Aug 2025
Kounodai, Iwata, Shizuoka, Japan
5 AM21st Aug 2025
6 PM
4 AM22nd Aug 2025
AQI
AQI
62AQI
41AQI
In the last 24 hours,
Kounodai's AQI reached its highest point of 62 at 1 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 21st Aug and 22nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Kounodai, Iwata, Shizuoka, Japan
28°C25/31°C
28°C25/32°C
28°C26/31°C
28°C26/32°C
28°C25/31°C
28°C26/32°C
29°C25/32°C
29°C25/33°C
29°C26/34°C
30°C26/35°C
30°C27/35°C
30°C27/33°C
29°C27/32°C
30°C27/33°C
32°C29/36°C
30°C28/32°C
29°C26/33°C
29°C26/33°C
26°C25/27°C
26°C25/27°C
25°C25/26°C
28°C26/33°C
27°C26/29°C
28°C26/32°C
28°C25/30°C
28°C25/32°C
29°C26/33°C
28°C26/32°C
29°C26/33°C
--°C/°C
--°C/°C
43AQI
39AQI
39AQI
36AQI
2025 Days Vs Air Quality
Kounodai, Iwata, Shizuoka, Japan
88%
203
12%
28
0.4%
1
Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)
Under WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2025, 88% of 233 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
Kounodai, Iwata, Shizuoka, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
33AQI
31AQI
29AQI
30AQI
26AQI
36AQI
25AQI
29AQI
25AQI
28AQI
27AQI
29AQI
42AQI
38AQI
30AQI
30AQI
26AQI
27AQI
33AQI
32AQI
34AQI
56AQI
49AQI
41AQI
38AQI
27AQI
37AQI
29AQI
32AQI
42AQI
37AQI
33AQI
41AQI
30AQI
34AQI
30AQI
33AQI
30AQI
30AQI
31AQI
32AQI
28AQI
32AQI
31AQI
31AQI
39AQI
40AQI
32AQI
32AQI
31AQI
30AQI
32AQI
33AQI
33AQI
37AQI
37AQI
43AQI
51AQI
46AQI
54AQI
39AQI
38AQI
26AQI
31AQI
31AQI
31AQI
34AQI
35AQI
31AQI
29AQI
47AQI
35AQI
37AQI
20AQI
19AQI
20AQI
17AQI
29AQI
56AQI
51AQI
64AQI
60AQI
68AQI
110AQI
72AQI
61AQI
40AQI
39AQI
31AQI
27AQI
27AQI
22AQI
20AQI
28AQI
24AQI
34AQI
40AQI
37AQI
49AQI
42AQI
49AQI
27AQI
48AQI
22AQI
42AQI
44AQI
50AQI
59AQI
39AQI
47AQI
35AQI
36AQI
33AQI
44AQI
45AQI
49AQI
39AQI
46AQI
44AQI
44AQI
26AQI
38AQI
31AQI
35AQI
22AQI
32AQI
26AQI
27AQI
24AQI
24AQI
31AQI
41AQI
42AQI
42AQI
41AQI
33AQI
45AQI
43AQI
54AQI
33AQI
35AQI
33AQI
31AQI
22AQI
28AQI
22AQI
30AQI
33AQI
27AQI
27AQI
23AQI
31AQI
25AQI
36AQI
42AQI
46AQI
51AQI
59AQI
44AQI
30AQI
27AQI
42AQI
42AQI
36AQI
31AQI
34AQI
41AQI
47AQI
51AQI
41AQI
37AQI
29AQI
27AQI
24AQI
23AQI
20AQI
32AQI
34AQI
32AQI
35AQI
39AQI
39AQI
43AQI
42AQI
69AQI
63AQI
73AQI
83AQI
75AQI
57AQI
56AQI
56AQI
52AQI
47AQI
48AQI
48AQI
51AQI
43AQI
34AQI
33AQI
29AQI
26AQI
25AQI
26AQI
28AQI
24AQI
22AQI
24AQI
27AQI
37AQI
33AQI
42AQI
44AQI
46AQI
65AQI
50AQI
54AQI
48AQI
46AQI
51AQI
45AQI
39AQI
37AQI
38AQI
36AQI
39AQI
37AQI
41AQI
44AQI
44AQI
46AQI
33AQI
34AQI
42AQI
38AQI
33AQI
36AQI
44AQI
45AQI
No. of days
202538AQI
Highest AQI recorded in
August45AQI
Lowest AQI recorded in
January33AQI
202435AQI
Highest AQI recorded in
April45AQI
Lowest AQI recorded in
December29AQI
202337AQI
Highest AQI recorded in
April49AQI
Lowest AQI recorded in
August30AQI
202236AQI
Highest AQI recorded in
March44AQI
Lowest AQI recorded in
August26AQI
202134AQI
Highest AQI recorded in
June41AQI
Lowest AQI recorded in
January26AQI
202032AQI
Highest AQI recorded in
August52AQI
Lowest AQI recorded in
December22AQI
Most & Least Polluted Years Over the Last 6 Years
Kounodai's annual 2025 AQI (38) shows an average percentage change of 8.6% (worsened AQI) compared to previous years: 2020 (32), 2021 (34), 2022 (36), 2023 (37), 2024 (35).