Hualien, Hualien, Taiwan 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
Hualien, Hualien, Taiwan
AQI Trends: Highest and Lowest
Same Day Analysis (30th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 32 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 31st Aug - 1st Sep 2025
Hualien, Hualien, Taiwan
5 AM31st Aug 2025
6 PM
4 AM1st Sep 2025
AQI
AQI
43AQI
17AQI
In the last 24 hours,
Hualien's AQI reached its highest point of 43 at 1 AM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 31st Aug and 1st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Hualien, Hualien, Taiwan
26°C23/30°C
25°C23/29°C
25°C23/28°C
25°C22/30°C
26°C21/30°C
26°C20/31°C
27°C22/31°C
28°C24/31°C
27°C24/31°C
27°C23/30°C
27°C23/30°C
25°C21/26°C
26°C22/29°C
26°C23/29°C
26°C22/29°C
26°C22/30°C
26°C21/30°C
25°C20/30°C
25°C20/29°C
25°C20/29°C
26°C21/30°C
27°C22/31°C
27°C22/31°C
27°C22/30°C
26°C22/29°C
26°C23/28°C
26°C23/30°C
26°C21/30°C
26°C22/30°C
--°C/°C
--°C/°C
41AQI
30AQI
42AQI
34AQI
2025 Days Vs Air Quality
Hualien, Hualien, Taiwan
77%
186
23%
56
Total number of days with different AQI categories in last 243 days in 2025 (122 days remaining)
Under WHO’s Safe Air Quality Limits: 77%
Health Risk Level:
Low
In 2025, 77% of 243 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
Hualien, Hualien, Taiwan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
73AQI
49AQI
51AQI
48AQI
44AQI
64AQI
56AQI
48AQI
52AQI
38AQI
37AQI
42AQI
46AQI
51AQI
54AQI
48AQI
44AQI
44AQI
45AQI
52AQI
62AQI
60AQI
56AQI
50AQI
51AQI
52AQI
47AQI
52AQI
48AQI
49AQI
44AQI
37AQI
35AQI
31AQI
48AQI
45AQI
43AQI
41AQI
43AQI
34AQI
37AQI
34AQI
43AQI
30AQI
37AQI
32AQI
47AQI
67AQI
47AQI
46AQI
47AQI
40AQI
40AQI
35AQI
40AQI
41AQI
48AQI
56AQI
49AQI
47AQI
44AQI
47AQI
33AQI
38AQI
33AQI
39AQI
37AQI
42AQI
47AQI
53AQI
52AQI
52AQI
41AQI
36AQI
40AQI
54AQI
38AQI
53AQI
55AQI
53AQI
54AQI
51AQI
51AQI
53AQI
55AQI
55AQI
54AQI
35AQI
33AQI
31AQI
29AQI
41AQI
43AQI
57AQI
56AQI
51AQI
61AQI
54AQI
55AQI
54AQI
51AQI
47AQI
80AQI
61AQI
72AQI
66AQI
62AQI
55AQI
56AQI
56AQI
54AQI
52AQI
54AQI
42AQI
41AQI
28AQI
34AQI
43AQI
44AQI
46AQI
51AQI
60AQI
61AQI
58AQI
49AQI
56AQI
54AQI
54AQI
39AQI
40AQI
31AQI
46AQI
40AQI
37AQI
34AQI
33AQI
34AQI
29AQI
28AQI
29AQI
30AQI
36AQI
39AQI
36AQI
49AQI
46AQI
41AQI
36AQI
30AQI
43AQI
49AQI
40AQI
41AQI
35AQI
30AQI
35AQI
28AQI
31AQI
29AQI
28AQI
26AQI
29AQI
29AQI
25AQI
29AQI
38AQI
36AQI
35AQI
34AQI
30AQI
29AQI
28AQI
26AQI
27AQI
30AQI
31AQI
26AQI
24AQI
23AQI
25AQI
25AQI
27AQI
30AQI
38AQI
31AQI
32AQI
26AQI
27AQI
34AQI
40AQI
34AQI
31AQI
39AQI
42AQI
47AQI
48AQI
47AQI
46AQI
38AQI
36AQI
32AQI
30AQI
30AQI
34AQI
39AQI
34AQI
33AQI
37AQI
34AQI
31AQI
31AQI
33AQI
38AQI
38AQI
35AQI
39AQI
44AQI
44AQI
43AQI
41AQI
39AQI
36AQI
36AQI
40AQI
40AQI
33AQI
32AQI
33AQI
31AQI
33AQI
35AQI
35AQI
35AQI
36AQI
37AQI
36AQI
33AQI
32AQI
32AQI
31AQI
31AQI
32AQI
50AQI
42AQI
45AQI
52AQI
42AQI
30AQI
35AQI
36AQI
No. of days
202542AQI
Highest AQI recorded in
April52AQI
Lowest AQI recorded in
June30AQI
202439AQI
Highest AQI recorded in
April56AQI
Lowest AQI recorded in
September22AQI
202335AQI
Highest AQI recorded in
April50AQI
Lowest AQI recorded in
September26AQI
202234AQI
Highest AQI recorded in
September45AQI
Lowest AQI recorded in
July25AQI
202136AQI
Highest AQI recorded in
March45AQI
Lowest AQI recorded in
June29AQI
202035AQI
Highest AQI recorded in
April48AQI
Lowest AQI recorded in
July26AQI
Most & Least Polluted Years Over the Last 6 Years
Hualien's annual 2025 AQI (42) shows an average percentage change of 16.1% (worsened AQI) compared to previous years: 2020 (35), 2021 (36), 2022 (34), 2023 (35), 2024 (39).