Chengjiao, Henan, 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
Chengjiao, Henan, China
AQI Trends: Highest and Lowest
Same Day Analysis (19th September ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 2nd highest AQI at 48 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Sep - 21st Sep 2025
Chengjiao, Henan, China
6 AM20th Sep 2025
6 PM
5 AM21st Sep 2025
77AQI
54AQI
69AQI
58AQI
In the last 24 hours,
Chengjiao's AQI reached its highest point of 77 at 1 PM during the Day, while the lowest point, 54, was recorded at 7 AM during the Day between 20th Sep and 21st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Chengjiao, Henan, China
30°C27/34°C
28°C24/32°C
22°C21/22°C
25°C22/29°C
27°C24/31°C
27°C24/31°C
28°C24/33°C
26°C23/31°C
26°C23/29°C
26°C22/30°C
27°C22/33°C
26°C22/31°C
22°C19/24°C
21°C20/21°C
22°C20/25°C
23°C21/27°C
24°C19/29°C
23°C19/27°C
23°C18/29°C
23°C19/27°C
20°C17/22°C
20°C18/24°C
24°C19/29°C
25°C20/31°C
26°C22/29°C
22°C19/24°C
19°C16/22°C
16°C13/20°C
15°C13/17°C
19°C14/25°C
--°C/°C
66AQI
58AQI
61AQI
61AQI
2025 Days Vs Air Quality
Chengjiao, Henan, China
0.3%
1
61%
159
30%
78
9%
23
0.3%
1
Total number of days with different AQI categories in last 264 days in 2025 (101 days remaining)
Under WHO’s Safe Air Quality Limits: 0.38%
Health Risk Level:
Extreme
In 2025, 0.38% of 264 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
Chengjiao, Henan, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
158AQI
141AQI
163AQI
174AQI
133AQI
103AQI
104AQI
81AQI
88AQI
121AQI
89AQI
90AQI
124AQI
112AQI
90AQI
96AQI
129AQI
141AQI
144AQI
165AQI
192AQI
161AQI
159AQI
167AQI
168AQI
112AQI
84AQI
95AQI
177AQI
158AQI
163AQI
163AQI
180AQI
138AQI
131AQI
92AQI
101AQI
74AQI
84AQI
110AQI
133AQI
150AQI
123AQI
111AQI
132AQI
112AQI
97AQI
111AQI
125AQI
103AQI
127AQI
139AQI
145AQI
107AQI
147AQI
130AQI
148AQI
155AQI
167AQI
163AQI
100AQI
93AQI
93AQI
133AQI
131AQI
143AQI
141AQI
153AQI
154AQI
160AQI
152AQI
158AQI
109AQI
138AQI
78AQI
87AQI
74AQI
95AQI
69AQI
75AQI
79AQI
101AQI
408AQI
197AQI
149AQI
113AQI
122AQI
86AQI
99AQI
102AQI
96AQI
68AQI
94AQI
124AQI
77AQI
110AQI
110AQI
115AQI
136AQI
126AQI
139AQI
139AQI
105AQI
80AQI
88AQI
116AQI
134AQI
124AQI
118AQI
111AQI
101AQI
92AQI
111AQI
77AQI
103AQI
93AQI
102AQI
79AQI
84AQI
103AQI
86AQI
106AQI
73AQI
87AQI
138AQI
119AQI
137AQI
125AQI
100AQI
84AQI
80AQI
86AQI
101AQI
99AQI
80AQI
105AQI
141AQI
97AQI
124AQI
110AQI
122AQI
115AQI
133AQI
100AQI
107AQI
94AQI
106AQI
100AQI
99AQI
93AQI
90AQI
91AQI
100AQI
77AQI
83AQI
82AQI
90AQI
102AQI
102AQI
100AQI
84AQI
89AQI
85AQI
85AQI
80AQI
70AQI
66AQI
67AQI
68AQI
64AQI
69AQI
69AQI
63AQI
65AQI
69AQI
78AQI
67AQI
69AQI
62AQI
63AQI
60AQI
53AQI
56AQI
52AQI
57AQI
54AQI
55AQI
62AQI
64AQI
64AQI
76AQI
83AQI
80AQI
74AQI
75AQI
75AQI
75AQI
67AQI
70AQI
73AQI
73AQI
69AQI
69AQI
58AQI
58AQI
61AQI
60AQI
60AQI
61AQI
60AQI
60AQI
61AQI
62AQI
62AQI
62AQI
66AQI
67AQI
70AQI
69AQI
65AQI
56AQI
62AQI
61AQI
56AQI
57AQI
62AQI
63AQI
53AQI
57AQI
62AQI
61AQI
56AQI
55AQI
59AQI
58AQI
59AQI
66AQI
62AQI
66AQI
62AQI
63AQI
63AQI
61AQI
64AQI
61AQI
62AQI
52AQI
57AQI
65AQI
68AQI
64AQI
57AQI
63AQI
59AQI
56AQI
65AQI
66AQI
64AQI
58AQI
52AQI
56AQI
48AQI
132AQI
126AQI
128AQI
105AQI
104AQI
77AQI
65AQI
61AQI
60AQI
No. of days
202597AQI
Highest AQI recorded in
January132AQI
Lowest AQI recorded in
September60AQI
2024102AQI
Highest AQI recorded in
January155AQI
Lowest AQI recorded in
July65AQI
2023142AQI
Highest AQI recorded in
December144AQI
Lowest AQI recorded in
November123AQI
2021149AQI
Highest AQI recorded in
January157AQI
Lowest AQI recorded in
March135AQI
2020127AQI
Highest AQI recorded in
December164AQI
Lowest AQI recorded in
August87AQI
Most & Least Polluted Years Over the Last 5 Years
Chengjiao's annual 2025 AQI (97) shows an average percentage change of -23.8% (improved AQI) compared to previous years: 2020 (127), 2021 (149), 2023 (142), 2024 (102).