Nagahama, Shiga, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
Nagahama, Shiga, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (31st July ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 1st highest AQI at 41 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
2025 Days Vs Air Quality
Nagahama, Shiga, Japan
74%
134
26%
47
Total number of days with different AQI categories in last 182 days in 2025 (183 days remaining)
Under WHO’s Safe Air Quality Limits: 74%
Health Risk Level:
Low
In 2025, 74% of 182 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
Nagahama, Shiga, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
31AQI
29AQI
27AQI
28AQI
28AQI
33AQI
28AQI
30AQI
26AQI
24AQI
31AQI
26AQI
44AQI
33AQI
31AQI
29AQI
29AQI
31AQI
34AQI
35AQI
38AQI
56AQI
52AQI
42AQI
38AQI
34AQI
32AQI
34AQI
33AQI
57AQI
59AQI
41AQI
45AQI
38AQI
38AQI
32AQI
36AQI
32AQI
31AQI
30AQI
32AQI
29AQI
31AQI
34AQI
31AQI
34AQI
38AQI
31AQI
32AQI
32AQI
31AQI
32AQI
32AQI
33AQI
34AQI
48AQI
51AQI
56AQI
58AQI
59AQI
42AQI
37AQI
28AQI
36AQI
34AQI
35AQI
36AQI
38AQI
34AQI
32AQI
49AQI
42AQI
39AQI
23AQI
25AQI
27AQI
24AQI
38AQI
56AQI
58AQI
72AQI
72AQI
82AQI
81AQI
88AQI
52AQI
49AQI
36AQI
37AQI
35AQI
31AQI
24AQI
28AQI
39AQI
42AQI
47AQI
53AQI
44AQI
56AQI
54AQI
55AQI
31AQI
50AQI
24AQI
46AQI
47AQI
61AQI
65AQI
53AQI
44AQI
50AQI
25AQI
27AQI
62AQI
53AQI
65AQI
46AQI
55AQI
67AQI
58AQI
39AQI
46AQI
40AQI
46AQI
30AQI
32AQI
35AQI
32AQI
28AQI
31AQI
42AQI
53AQI
57AQI
58AQI
56AQI
39AQI
54AQI
54AQI
72AQI
62AQI
41AQI
53AQI
43AQI
31AQI
33AQI
32AQI
30AQI
39AQI
37AQI
31AQI
38AQI
48AQI
27AQI
42AQI
38AQI
50AQI
53AQI
68AQI
50AQI
30AQI
35AQI
45AQI
50AQI
36AQI
30AQI
44AQI
46AQI
51AQI
54AQI
62AQI
55AQI
54AQI
40AQI
37AQI
38AQI
34AQI
51AQI
41AQI
49AQI
55AQI
34AQI
37AQI
46AQI
46AQI
43AQI
45AQI
No. of days
202542AQI
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
January34AQI
202438AQI
Highest AQI recorded in
April48AQI
Lowest AQI recorded in
December30AQI
202339AQI
Highest AQI recorded in
April51AQI
Lowest AQI recorded in
January31AQI
202237AQI
Highest AQI recorded in
May47AQI
Lowest AQI recorded in
August25AQI
202136AQI
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
January26AQI
202034AQI
Highest AQI recorded in
August57AQI
Lowest AQI recorded in
December22AQI
Most & Least Polluted Years Over the Last 6 Years
Nagahama's annual 2025 AQI (42) shows an average percentage change of 14.05% (worsened AQI) compared to previous years: 2020 (34), 2021 (36), 2022 (37), 2023 (39), 2024 (38).
