Zhoushan, Zhejiang, China 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
Zhoushan, Zhejiang, China
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 49 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Aug - 21st Aug 2025
Zhoushan, Zhejiang, China
5 AM20th Aug 2025
6 PM
4 AM21st Aug 2025
55AQI
44AQI
57AQI
50AQI
In the last 24 hours,
Zhoushan's AQI reached its highest point of 57 at 7 PM during the Night, while the lowest point, 44, was recorded at 8 AM during the Day between 20th Aug and 21st Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Zhoushan, Zhejiang, China
28°C27/28°C
28°C27/29°C
28°C27/29°C
27°C27/28°C
28°C27/29°C
28°C27/29°C
28°C27/28°C
27°C26/27°C
26°C26/27°C
28°C27/30°C
28°C27/29°C
28°C27/30°C
29°C27/31°C
29°C27/30°C
28°C28/29°C
29°C28/31°C
29°C27/31°C
29°C27/30°C
29°C27/31°C
28°C27/30°C
28°C27/30°C
28°C27/29°C
28°C27/29°C
28°C27/29°C
28°C27/29°C
28°C27/29°C
28°C27/29°C
28°C27/29°C
28°C28/29°C
28°C28/30°C
--°C/°C
50AQI
45AQI
49AQI
49AQI
2025 Days Vs Air Quality
Zhoushan, Zhejiang, China
23%
53
69%
159
7%
17
1%
3
Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)
Under WHO’s Safe Air Quality Limits: 23%
Health Risk Level:
Very high
In 2025, 23% of 233 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.
Annual Air Quality Insights
Zhoushan, Zhejiang, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
80AQI
73AQI
79AQI
70AQI
105AQI
116AQI
109AQI
125AQI
78AQI
80AQI
91AQI
109AQI
124AQI
103AQI
80AQI
87AQI
109AQI
104AQI
125AQI
152AQI
154AQI
97AQI
92AQI
78AQI
72AQI
70AQI
65AQI
66AQI
109AQI
80AQI
70AQI
53AQI
78AQI
95AQI
106AQI
88AQI
84AQI
77AQI
65AQI
78AQI
76AQI
61AQI
113AQI
69AQI
71AQI
68AQI
115AQI
65AQI
76AQI
74AQI
61AQI
62AQI
68AQI
80AQI
126AQI
99AQI
151AQI
104AQI
88AQI
80AQI
73AQI
64AQI
55AQI
50AQI
61AQI
65AQI
90AQI
63AQI
77AQI
64AQI
66AQI
61AQI
59AQI
40AQI
77AQI
67AQI
74AQI
68AQI
79AQI
77AQI
87AQI
83AQI
97AQI
94AQI
80AQI
80AQI
66AQI
74AQI
53AQI
58AQI
62AQI
72AQI
68AQI
60AQI
75AQI
81AQI
76AQI
79AQI
69AQI
82AQI
65AQI
122AQI
74AQI
81AQI
68AQI
69AQI
76AQI
64AQI
64AQI
66AQI
56AQI
65AQI
62AQI
80AQI
63AQI
56AQI
55AQI
57AQI
59AQI
50AQI
65AQI
60AQI
66AQI
49AQI
56AQI
78AQI
67AQI
64AQI
57AQI
59AQI
62AQI
67AQI
63AQI
57AQI
53AQI
57AQI
67AQI
63AQI
58AQI
61AQI
46AQI
57AQI
42AQI
66AQI
65AQI
61AQI
59AQI
57AQI
59AQI
71AQI
63AQI
50AQI
49AQI
53AQI
65AQI
53AQI
57AQI
57AQI
51AQI
55AQI
43AQI
46AQI
45AQI
38AQI
48AQI
40AQI
43AQI
55AQI
55AQI
50AQI
44AQI
54AQI
58AQI
53AQI
53AQI
57AQI
57AQI
58AQI
56AQI
45AQI
41AQI
41AQI
46AQI
49AQI
49AQI
45AQI
39AQI
39AQI
40AQI
40AQI
49AQI
41AQI
40AQI
44AQI
60AQI
59AQI
60AQI
58AQI
52AQI
45AQI
44AQI
40AQI
40AQI
38AQI
40AQI
38AQI
35AQI
36AQI
36AQI
35AQI
31AQI
48AQI
54AQI
57AQI
58AQI
59AQI
51AQI
51AQI
57AQI
60AQI
63AQI
63AQI
61AQI
57AQI
49AQI
42AQI
39AQI
43AQI
50AQI
46AQI
49AQI
49AQI
95AQI
84AQI
70AQI
69AQI
60AQI
51AQI
44AQI
53AQI
No. of days
202566AQI
Highest AQI recorded in
January95AQI
Lowest AQI recorded in
July44AQI
202461AQI
Highest AQI recorded in
January103AQI
Lowest AQI recorded in
July42AQI
202362AQI
Highest AQI recorded in
December89AQI
Lowest AQI recorded in
July45AQI
202257AQI
Highest AQI recorded in
December76AQI
Lowest AQI recorded in
October41AQI
202156AQI
Highest AQI recorded in
January79AQI
Lowest AQI recorded in
July38AQI
202053AQI
Highest AQI recorded in
April74AQI
Lowest AQI recorded in
August45AQI
Most & Least Polluted Years Over the Last 6 Years
Zhoushan's annual 2025 AQI (66) shows an average percentage change of 15.3% (worsened AQI) compared to previous years: 2020 (53), 2021 (56), 2022 (57), 2023 (62), 2024 (61).