Hemu Primary School, 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
Hemu Primary School, Hangzhou, Zhejiang, China
AQI Trends: Highest and Lowest
Same Day Analysis (17th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 62 of Moderate air quality, showing improvement over 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Hemu Primary School, Hangzhou, Zhejiang, China
5 AM17th Sep 2025
6 PM
4 AM18th Sep 2025
AQI
AQI
68AQI
56AQI
In the last 24 hours,
Hemu Primary School's AQI reached its highest point of 68 at 12 PM during the Night, while the lowest point, 56, was recorded at 12 AM during the Night between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Hemu Primary School, Hangzhou, Zhejiang, China
31°C27/38°C
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
--°C/°C
--°C/°C
61AQI
58AQI
58AQI
58AQI
2025 Days Vs Air Quality
Hemu Primary School, Hangzhou, Zhejiang, China
11%
28
66%
172
20%
53
2%
6
0.3%
1
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Under WHO’s Safe Air Quality Limits: 11%
Health Risk Level:
Extreme
In 2025, 11% of 260 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
Hemu Primary School, Hangzhou, Zhejiang, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
149AQI
143AQI
150AQI
144AQI
159AQI
145AQI
136AQI
138AQI
95AQI
97AQI
102AQI
115AQI
134AQI
143AQI
88AQI
98AQI
104AQI
133AQI
129AQI
159AQI
167AQI
168AQI
139AQI
105AQI
87AQI
85AQI
66AQI
75AQI
143AQI
114AQI
124AQI
70AQI
111AQI
119AQI
109AQI
95AQI
118AQI
79AQI
73AQI
75AQI
99AQI
128AQI
134AQI
146AQI
139AQI
152AQI
101AQI
118AQI
91AQI
114AQI
89AQI
81AQI
102AQI
134AQI
127AQI
157AQI
149AQI
138AQI
108AQI
100AQI
94AQI
59AQI
61AQI
78AQI
87AQI
114AQI
119AQI
107AQI
133AQI
119AQI
95AQI
82AQI
72AQI
57AQI
88AQI
66AQI
81AQI
90AQI
93AQI
79AQI
87AQI
83AQI
91AQI
86AQI
118AQI
97AQI
83AQI
85AQI
85AQI
69AQI
85AQI
89AQI
105AQI
108AQI
92AQI
107AQI
96AQI
102AQI
112AQI
99AQI
96AQI
234AQI
84AQI
102AQI
74AQI
82AQI
85AQI
96AQI
112AQI
110AQI
101AQI
86AQI
84AQI
92AQI
69AQI
82AQI
67AQI
86AQI
79AQI
91AQI
78AQI
81AQI
83AQI
64AQI
73AQI
96AQI
106AQI
86AQI
62AQI
59AQI
63AQI
72AQI
78AQI
81AQI
123AQI
83AQI
82AQI
81AQI
74AQI
68AQI
54AQI
69AQI
51AQI
77AQI
90AQI
93AQI
92AQI
79AQI
71AQI
87AQI
83AQI
65AQI
47AQI
64AQI
80AQI
68AQI
71AQI
85AQI
51AQI
63AQI
56AQI
59AQI
66AQI
61AQI
59AQI
42AQI
50AQI
57AQI
59AQI
56AQI
53AQI
54AQI
53AQI
50AQI
55AQI
65AQI
64AQI
56AQI
52AQI
52AQI
55AQI
49AQI
54AQI
56AQI
58AQI
58AQI
56AQI
52AQI
48AQI
52AQI
57AQI
55AQI
53AQI
56AQI
59AQI
64AQI
62AQI
61AQI
62AQI
50AQI
46AQI
41AQI
43AQI
49AQI
47AQI
47AQI
39AQI
42AQI
41AQI
47AQI
35AQI
38AQI
54AQI
59AQI
58AQI
63AQI
58AQI
51AQI
47AQI
47AQI
49AQI
54AQI
57AQI
61AQI
53AQI
42AQI
41AQI
45AQI
50AQI
49AQI
53AQI
58AQI
61AQI
55AQI
51AQI
55AQI
56AQI
58AQI
55AQI
49AQI
51AQI
51AQI
54AQI
56AQI
54AQI
57AQI
68AQI
68AQI
66AQI
74AQI
66AQI
58AQI
56AQI
57AQI
59AQI
59AQI
55AQI
62AQI
64AQI
62AQI
124AQI
113AQI
89AQI
97AQI
79AQI
59AQI
51AQI
53AQI
61AQI
No. of days
202581AQI
Highest AQI recorded in
January124AQI
Lowest AQI recorded in
July51AQI
202481AQI
Highest AQI recorded in
January138AQI
Lowest AQI recorded in
July47AQI
202393AQI
Highest AQI recorded in
January122AQI
Lowest AQI recorded in
July55AQI
202293AQI
Highest AQI recorded in
January131AQI
Lowest AQI recorded in
August60AQI
202187AQI
Highest AQI recorded in
January127AQI
Lowest AQI recorded in
July62AQI
202086AQI
Highest AQI recorded in
December140AQI
Lowest AQI recorded in
June63AQI
Most & Least Polluted Years Over the Last 6 Years
Hemu Primary School's annual 2025 AQI (81) shows an average percentage change of -7.4% (improved AQI) compared to previous years: 2020 (86), 2021 (87), 2022 (93), 2023 (93), 2024 (81).