Cotton Research Institute, Dengtalu, Henan, 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
Cotton Research Institute, Dengtalu, Henan, China
AQI Trends: Highest and Lowest
Same Day Analysis (18th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 73 of Moderate air quality, showing improvement over 2024 and 2023 on the same day.
Day & Night AQI Trend: 17th Aug - 18th Aug 2026
Cotton Research Institute, Dengtalu, Henan, China
5 AM17th Aug 2026
7 PM
4 AM18th Aug 2026
76AQI
51AQI
79AQI
58AQI
In the last 24 hours,
Cotton Research Institute's AQI reached its highest point of 79 at 12 AM during the Night, while the lowest point, 51, was recorded at 11 AM during the Day between 17th Aug and 18th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Cotton Research Institute, Dengtalu, Henan, China
29°C24/36°C
28°C22/38°C
28°C23/35°C
28°C23/34°C
27°C24/32°C
28°C23/34°C
29°C25/35°C
26°C24/29°C
26°C24/30°C
28°C24/34°C
27°C24/30°C
28°C25/33°C
30°C27/34°C
31°C27/37°C
31°C26/36°C
30°C25/37°C
29°C23/35°C
30°C25/37°C
32°C27/39°C
28°C24/33°C
26°C20/33°C
28°C21/34°C
24°C23/24°C
22°C22/23°C
22°C21/24°C
25°C21/29°C
27°C22/32°C
27°C23/33°C
14°C12/16°C
25°C24/27°C
66AQI
62AQI
62AQI
60AQI
2026 Days Vs Air Quality
Cotton Research Institute, Dengtalu, Henan, China
6%
14
56%
128
23%
53
15%
34
0.4%
1
Total number of days with different AQI categories in last 230 days in 2026 (135 days remaining)
Under WHO’s Safe Air Quality Limits: 6%
Health Risk Level:
Extreme
In 2026, 6% of 230 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
Cotton Research Institute, Dengtalu, Henan, China
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
97AQI (US)
160AQI (US)
182AQI (US)
195AQI (US)
204AQI (US)
95AQI (US)
78AQI (US)
116AQI (US)
90AQI (US)
70AQI (US)
54AQI (US)
96AQI (US)
127AQI (US)
165AQI (US)
143AQI (US)
168AQI (US)
142AQI (US)
126AQI (US)
104AQI (US)
66AQI (US)
136AQI (US)
147AQI (US)
151AQI (US)
180AQI (US)
168AQI (US)
166AQI (US)
180AQI (US)
189AQI (US)
132AQI (US)
146AQI (US)
161AQI (US)
158AQI (US)
171AQI (US)
171AQI (US)
167AQI (US)
145AQI (US)
85AQI (US)
113AQI (US)
147AQI (US)
146AQI (US)
127AQI (US)
125AQI (US)
152AQI (US)
163AQI (US)
169AQI (US)
76AQI (US)
71AQI (US)
131AQI (US)
105AQI (US)
86AQI (US)
77AQI (US)
100AQI (US)
97AQI (US)
81AQI (US)
92AQI (US)
77AQI (US)
96AQI (US)
151AQI (US)
140AQI (US)
125AQI (US)
151AQI (US)
166AQI (US)
162AQI (US)
153AQI (US)
138AQI (US)
115AQI (US)
158AQI (US)
145AQI (US)
166AQI (US)
166AQI (US)
174AQI (US)
173AQI (US)
149AQI (US)
85AQI (US)
112AQI (US)
148AQI (US)
91AQI (US)
106AQI (US)
157AQI (US)
152AQI (US)
114AQI (US)
126AQI (US)
155AQI (US)
153AQI (US)
134AQI (US)
159AQI (US)
137AQI (US)
83AQI (US)
116AQI (US)
125AQI (US)
135AQI (US)
147AQI (US)
92AQI (US)
57AQI (US)
77AQI (US)
85AQI (US)
90AQI (US)
123AQI (US)
109AQI (US)
111AQI (US)
106AQI (US)
118AQI (US)
73AQI (US)
105AQI (US)
93AQI (US)
146AQI (US)
136AQI (US)
104AQI (US)
89AQI (US)
92AQI (US)
62AQI (US)
63AQI (US)
91AQI (US)
80AQI (US)
72AQI (US)
103AQI (US)
112AQI (US)
83AQI (US)
60AQI (US)
80AQI (US)
87AQI (US)
59AQI (US)
47AQI (US)
69AQI (US)
88AQI (US)
97AQI (US)
68AQI (US)
58AQI (US)
67AQI (US)
82AQI (US)
96AQI (US)
123AQI (US)
131AQI (US)
132AQI (US)
118AQI (US)
76AQI (US)
65AQI (US)
57AQI (US)
54AQI (US)
63AQI (US)
68AQI (US)
79AQI (US)
71AQI (US)
72AQI (US)
66AQI (US)
48AQI (US)
74AQI (US)
61AQI (US)
54AQI (US)
62AQI (US)
70AQI (US)
90AQI (US)
112AQI (US)
121AQI (US)
45AQI (US)
107AQI (US)
69AQI (US)
39AQI (US)
55AQI (US)
51AQI (US)
69AQI (US)
82AQI (US)
94AQI (US)
74AQI (US)
88AQI (US)
83AQI (US)
75AQI (US)
77AQI (US)
91AQI (US)
52AQI (US)
57AQI (US)
65AQI (US)
40AQI (US)
76AQI (US)
55AQI (US)
69AQI (US)
42AQI (US)
89AQI (US)
75AQI (US)
74AQI (US)
89AQI (US)
79AQI (US)
97AQI (US)
77AQI (US)
58AQI (US)
67AQI (US)
62AQI (US)
54AQI (US)
57AQI (US)
81AQI (US)
57AQI (US)
64AQI (US)
72AQI (US)
67AQI (US)
75AQI (US)
68AQI (US)
69AQI (US)
49AQI (US)
67AQI (US)
82AQI (US)
91AQI (US)
81AQI (US)
63AQI (US)
41AQI (US)
62AQI (US)
74AQI (US)
80AQI (US)
44AQI (US)
57AQI (US)
31AQI (US)
40AQI (US)
55AQI (US)
66AQI (US)
66AQI (US)
50AQI (US)
52AQI (US)
59AQI (US)
85AQI (US)
92AQI (US)
66AQI (US)
49AQI (US)
66AQI (US)
78AQI (US)
56AQI (US)
33AQI (US)
58AQI (US)
70AQI (US)
66AQI (US)
62AQI (US)
73AQI (US)
137AQI (US)
122AQI (US)
139AQI (US)
96AQI (US)
76AQI (US)
74AQI (US)
65AQI (US)
64AQI (US)
No. of days
202698AQI (US)
Highest AQI (US) recorded in
March139AQI (US)
Lowest AQI (US) recorded in
August64AQI (US)
2025103AQI (US)
Highest AQI (US) recorded in
December149AQI (US)
Lowest AQI (US) recorded in
August63AQI (US)
2024110AQI (US)
Highest AQI (US) recorded in
January152AQI (US)
Lowest AQI (US) recorded in
July67AQI (US)
2023117AQI (US)
Highest AQI (US) recorded in
February170AQI (US)
Lowest AQI (US) recorded in
August72AQI (US)
2022122AQI (US)
Highest AQI (US) recorded in
January169AQI (US)
Lowest AQI (US) recorded in
July66AQI (US)
2021121AQI (US)
Highest AQI (US) recorded in
March193AQI (US)
Lowest AQI (US) recorded in
July70AQI (US)
2020117AQI (US)
Highest AQI (US) recorded in
December172AQI (US)
Lowest AQI (US) recorded in
August80AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Cotton Research Institute's annual 2026 AQI (US) (98) shows an average percentage change of -14.4% (improved AQI (US)) compared to previous years: 2020 (117), 2021 (121), 2022 (122), 2023 (117), 2024 (110), 2025 (103).