Wolong Bridge, Hangzhou, Zhejiang, China Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Wolong Bridge, Hangzhou, Zhejiang, China
AQI Trends: Highest and Lowest
Same Day Analysis (18th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 57 of Moderate air quality, showing improvement over 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Sep - 19th Sep 2025
Wolong Bridge, Hangzhou, Zhejiang, China
5 AM18th Sep 2025
6 PM
4 AM19th Sep 2025
63AQI
39AQI
61AQI
53AQI
In the last 24 hours,
Wolong Bridge's AQI reached its highest point of 63 at 5 AM during the Day, while the lowest point, 39, was recorded at 11 AM during the Day between 18th Sep and 19th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Wolong Bridge, Hangzhou, Zhejiang, China
31°C27/39°C
31°C26/38°C
30°C25/37°C
31°C26/38°C
32°C27/40°C
30°C25/39°C
30°C25/36°C
31°C26/37°C
32°C26/38°C
31°C26/37°C
31°C27/38°C
29°C25/38°C
29°C25/34°C
27°C25/31°C
30°C24/37°C
30°C26/35°C
30°C26/36°C
30°C26/37°C
31°C26/36°C
31°C27/39°C
26°C24/32°C
26°C24/29°C
27°C24/30°C
29°C25/36°C
28°C24/33°C
28°C25/34°C
29°C25/35°C
30°C26/36°C
29°C25/35°C
25°C23/27°C
--°C/°C
60AQI
58AQI
60AQI
58AQI
2025 Days Vs Air Quality
Wolong Bridge, Hangzhou, Zhejiang, China
11%
29
67%
174
20%
51
2%
6
0.3%
1
Total number of days with different AQI categories in last 262 days in 2025 (103 days remaining)
Under WHO’s Safe Air Quality Limits: 11%
Health Risk Level:
Extreme
In 2025, 11% of 262 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.
Annual Air Quality Insights
Wolong Bridge, Hangzhou, Zhejiang, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
148AQI
141AQI
145AQI
140AQI
156AQI
139AQI
141AQI
133AQI
92AQI
96AQI
101AQI
113AQI
130AQI
132AQI
81AQI
95AQI
103AQI
128AQI
126AQI
154AQI
161AQI
166AQI
139AQI
104AQI
86AQI
87AQI
62AQI
73AQI
131AQI
109AQI
119AQI
67AQI
110AQI
119AQI
104AQI
94AQI
119AQI
76AQI
74AQI
76AQI
99AQI
129AQI
129AQI
145AQI
135AQI
152AQI
93AQI
119AQI
89AQI
117AQI
87AQI
81AQI
100AQI
133AQI
127AQI
154AQI
143AQI
131AQI
105AQI
93AQI
84AQI
61AQI
57AQI
73AQI
84AQI
110AQI
113AQI
105AQI
127AQI
115AQI
94AQI
79AQI
71AQI
51AQI
85AQI
61AQI
79AQI
84AQI
85AQI
74AQI
84AQI
81AQI
88AQI
87AQI
115AQI
94AQI
83AQI
85AQI
83AQI
69AQI
85AQI
86AQI
106AQI
106AQI
92AQI
103AQI
94AQI
105AQI
112AQI
96AQI
91AQI
225AQI
86AQI
104AQI
74AQI
80AQI
83AQI
100AQI
110AQI
115AQI
105AQI
87AQI
84AQI
94AQI
72AQI
83AQI
66AQI
88AQI
77AQI
92AQI
78AQI
83AQI
83AQI
67AQI
70AQI
100AQI
106AQI
83AQI
56AQI
61AQI
67AQI
73AQI
80AQI
81AQI
122AQI
78AQI
76AQI
81AQI
71AQI
67AQI
49AQI
73AQI
48AQI
84AQI
93AQI
96AQI
98AQI
80AQI
75AQI
90AQI
88AQI
64AQI
46AQI
68AQI
81AQI
67AQI
71AQI
89AQI
46AQI
58AQI
50AQI
56AQI
71AQI
57AQI
53AQI
36AQI
51AQI
61AQI
58AQI
55AQI
49AQI
54AQI
56AQI
51AQI
58AQI
73AQI
65AQI
55AQI
52AQI
52AQI
55AQI
47AQI
56AQI
59AQI
62AQI
61AQI
54AQI
48AQI
43AQI
49AQI
62AQI
52AQI
51AQI
58AQI
63AQI
70AQI
63AQI
63AQI
63AQI
44AQI
43AQI
38AQI
43AQI
51AQI
45AQI
47AQI
40AQI
44AQI
42AQI
47AQI
32AQI
38AQI
55AQI
60AQI
59AQI
64AQI
58AQI
52AQI
47AQI
52AQI
53AQI
57AQI
58AQI
61AQI
53AQI
43AQI
42AQI
46AQI
51AQI
49AQI
52AQI
59AQI
63AQI
56AQI
53AQI
56AQI
56AQI
59AQI
55AQI
49AQI
52AQI
52AQI
54AQI
57AQI
54AQI
58AQI
74AQI
69AQI
66AQI
74AQI
66AQI
57AQI
55AQI
58AQI
59AQI
59AQI
58AQI
64AQI
65AQI
61AQI
57AQI
120AQI
111AQI
86AQI
97AQI
79AQI
59AQI
51AQI
54AQI
62AQI
No. of days
202580AQI
Highest AQI recorded in
January120AQI
Lowest AQI recorded in
July51AQI
202482AQI
Highest AQI recorded in
January134AQI
Lowest AQI recorded in
July52AQI
202384AQI
Highest AQI recorded in
December109AQI
Lowest AQI recorded in
July51AQI
202287AQI
Highest AQI recorded in
January126AQI
Lowest AQI recorded in
July58AQI
202182AQI
Highest AQI recorded in
December118AQI
Lowest AQI recorded in
July59AQI
202081AQI
Highest AQI recorded in
December138AQI
Lowest AQI recorded in
June57AQI
Most & Least Polluted Years Over the Last 6 Years
Wolong Bridge's annual 2025 AQI (80) shows an average percentage change of -3.4% (improved AQI) compared to previous years: 2020 (81), 2021 (82), 2022 (87), 2023 (84), 2024 (82).