High Tech Zone Epa, Changsha, Hunan, China Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
High Tech Zone Epa, Changsha, Hunan, China
AQI Trends: Highest and Lowest
Same Day Analysis (5th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 110 of Poor air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 5th Oct - 6th Oct 2025
High Tech Zone Epa, Changsha, Hunan, China
6 AM5th Oct 2025
6 PM
5 AM6th Oct 2025
AQI
AQI
146AQI
72AQI
In the last 24 hours,
High Tech Zone Epa's AQI reached its highest point of 146 at 2 PM during the Night, while the lowest point, 72, was recorded at 8 PM during the Night between 5th Oct and 6th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
High Tech Zone Epa, Changsha, Hunan, China
28°C25/31°C
28°C23/33°C
28°C24/35°C
25°C23/27°C
26°C23/31°C
27°C23/33°C
29°C24/35°C
26°C22/32°C
27°C24/33°C
29°C25/35°C
30°C26/36°C
30°C24/37°C
21°C20/22°C
19°C18/20°C
19°C17/20°C
19°C19/20°C
21°C19/23°C
20°C18/23°C
19°C18/22°C
20°C19/22°C
20°C18/22°C
24°C21/28°C
27°C22/33°C
24°C23/26°C
24°C21/29°C
26°C23/31°C
29°C22/35°C
24°C20/28°C
25°C19/31°C
--°C/°C
--°C/°C
68AQI
66AQI
72AQI
65AQI
2025 Days Vs Air Quality
High Tech Zone Epa, Changsha, Hunan, China
9%
26
60%
168
22%
61
7%
20
0.7%
2
0.3%
1
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 9%
Health Risk Level:
Extreme
In 2025, 9% of 278 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
High Tech Zone Epa, Changsha, Hunan, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
176AQI
181AQI
191AQI
218AQI
144AQI
161AQI
158AQI
142AQI
141AQI
113AQI
133AQI
132AQI
137AQI
147AQI
119AQI
124AQI
122AQI
141AQI
154AQI
164AQI
160AQI
162AQI
242AQI
174AQI
100AQI
97AQI
108AQI
116AQI
174AQI
133AQI
134AQI
113AQI
121AQI
128AQI
111AQI
139AQI
106AQI
121AQI
71AQI
91AQI
96AQI
128AQI
138AQI
156AQI
151AQI
160AQI
151AQI
120AQI
112AQI
112AQI
113AQI
152AQI
78AQI
156AQI
134AQI
156AQI
151AQI
135AQI
119AQI
90AQI
83AQI
47AQI
89AQI
79AQI
118AQI
96AQI
98AQI
123AQI
102AQI
106AQI
132AQI
124AQI
76AQI
90AQI
79AQI
80AQI
81AQI
79AQI
84AQI
98AQI
98AQI
130AQI
104AQI
133AQI
137AQI
137AQI
84AQI
100AQI
74AQI
96AQI
94AQI
100AQI
98AQI
121AQI
124AQI
126AQI
135AQI
135AQI
137AQI
122AQI
116AQI
412AQI
143AQI
158AQI
115AQI
128AQI
122AQI
119AQI
82AQI
108AQI
69AQI
89AQI
89AQI
73AQI
76AQI
72AQI
81AQI
92AQI
102AQI
90AQI
91AQI
88AQI
99AQI
101AQI
86AQI
99AQI
100AQI
76AQI
80AQI
80AQI
78AQI
86AQI
85AQI
98AQI
92AQI
78AQI
83AQI
90AQI
76AQI
54AQI
62AQI
56AQI
71AQI
94AQI
100AQI
96AQI
115AQI
72AQI
68AQI
59AQI
55AQI
44AQI
62AQI
72AQI
85AQI
79AQI
82AQI
62AQI
70AQI
63AQI
70AQI
59AQI
60AQI
68AQI
56AQI
59AQI
58AQI
50AQI
52AQI
53AQI
51AQI
50AQI
37AQI
37AQI
41AQI
49AQI
55AQI
52AQI
48AQI
50AQI
51AQI
45AQI
42AQI
47AQI
52AQI
60AQI
62AQI
68AQI
71AQI
67AQI
58AQI
63AQI
61AQI
60AQI
61AQI
60AQI
59AQI
61AQI
64AQI
63AQI
54AQI
43AQI
42AQI
39AQI
51AQI
52AQI
57AQI
50AQI
55AQI
57AQI
53AQI
61AQI
63AQI
69AQI
63AQI
61AQI
61AQI
50AQI
51AQI
49AQI
56AQI
57AQI
60AQI
63AQI
63AQI
58AQI
45AQI
55AQI
55AQI
53AQI
46AQI
47AQI
49AQI
50AQI
56AQI
54AQI
54AQI
58AQI
60AQI
60AQI
61AQI
61AQI
60AQI
60AQI
61AQI
63AQI
63AQI
66AQI
69AQI
71AQI
64AQI
58AQI
58AQI
57AQI
54AQI
59AQI
60AQI
61AQI
62AQI
62AQI
57AQI
51AQI
61AQI
63AQI
63AQI
64AQI
50AQI
49AQI
51AQI
66AQI
81AQI
87AQI
85AQI
93AQI
92AQI
87AQI
89AQI
110AQI
148AQI
126AQI
98AQI
118AQI
83AQI
58AQI
56AQI
56AQI
63AQI
94AQI
No. of days
202589AQI
Highest AQI recorded in
January148AQI
Lowest AQI recorded in
July56AQI
202499AQI
Highest AQI recorded in
December142AQI
Lowest AQI recorded in
July48AQI
202398AQI
Highest AQI recorded in
January154AQI
Lowest AQI recorded in
July56AQI
2022106AQI
Highest AQI recorded in
January150AQI
Lowest AQI recorded in
August42AQI
2021106AQI
Highest AQI recorded in
January154AQI
Lowest AQI recorded in
July62AQI
202099AQI
Highest AQI recorded in
December163AQI
Lowest AQI recorded in
August63AQI
Most & Least Polluted Years Over the Last 6 Years
High Tech Zone Epa's annual 2025 AQI (89) shows an average percentage change of -12.1% (improved AQI) compared to previous years: 2020 (99), 2021 (106), 2022 (106), 2023 (98), 2024 (99).