Hejian City Government, Hejian, Hebei, 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
Hejian City Government, Hejian, Hebei, China
AQI Trends: Highest and Lowest
Same Day Analysis (6th October ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 3rd highest AQI at 65 of Moderate air quality, showing improvement over 2024 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 6th Oct - 7th Oct 2025
Hejian City Government, Hejian, Hebei, China
6 AM6th Oct 2025
6 PM
5 AM7th Oct 2025
66AQI
56AQI
96AQI
66AQI
In the last 24 hours,
Hejian City Government's AQI reached its highest point of 96 at 1 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 6th Oct and 7th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Hejian City Government, Hejian, Hebei, China
24°C18/30°C
25°C21/31°C
24°C19/32°C
25°C19/31°C
25°C21/30°C
23°C19/28°C
25°C19/31°C
25°C20/32°C
24°C21/28°C
22°C20/26°C
18°C14/22°C
19°C13/26°C
16°C13/18°C
19°C12/27°C
22°C17/27°C
17°C15/18°C
16°C14/18°C
20°C12/29°C
23°C16/30°C
23°C18/29°C
19°C17/21°C
22°C16/29°C
23°C18/30°C
24°C18/32°C
24°C19/30°C
22°C18/26°C
21°C16/24°C
22°C18/26°C
18°C13/23°C
14°C11/18°C
--°C/°C
94AQI
70AQI
86AQI
73AQI
2025 Days Vs Air Quality
Hejian City Government, Hejian, Hebei, China
0.3%
1
72%
202
24%
68
3%
7
0.3%
1
Total number of days with different AQI categories in last 280 days in 2025 (85 days remaining)
Under WHO’s Safe Air Quality Limits: 0.36%
Health Risk Level:
Extreme
In 2025, 0.36% of 280 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
Hejian City Government, Hejian, Hebei, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
141AQI
94AQI
126AQI
139AQI
128AQI
86AQI
80AQI
59AQI
64AQI
87AQI
116AQI
91AQI
136AQI
82AQI
92AQI
89AQI
113AQI
145AQI
114AQI
151AQI
142AQI
107AQI
124AQI
135AQI
145AQI
126AQI
84AQI
109AQI
201AQI
118AQI
142AQI
123AQI
139AQI
78AQI
80AQI
64AQI
87AQI
48AQI
60AQI
86AQI
122AQI
142AQI
95AQI
129AQI
129AQI
138AQI
86AQI
82AQI
89AQI
92AQI
102AQI
92AQI
102AQI
67AQI
94AQI
98AQI
131AQI
149AQI
168AQI
182AQI
129AQI
102AQI
97AQI
127AQI
83AQI
145AQI
139AQI
159AQI
164AQI
171AQI
138AQI
156AQI
121AQI
104AQI
77AQI
75AQI
63AQI
78AQI
61AQI
68AQI
70AQI
113AQI
88AQI
87AQI
105AQI
82AQI
88AQI
66AQI
84AQI
94AQI
89AQI
70AQI
93AQI
116AQI
70AQI
111AQI
114AQI
106AQI
106AQI
116AQI
131AQI
102AQI
86AQI
78AQI
80AQI
109AQI
115AQI
83AQI
95AQI
105AQI
110AQI
82AQI
101AQI
68AQI
93AQI
101AQI
80AQI
85AQI
84AQI
89AQI
72AQI
89AQI
62AQI
78AQI
86AQI
78AQI
104AQI
104AQI
77AQI
81AQI
78AQI
84AQI
94AQI
76AQI
74AQI
114AQI
74AQI
95AQI
101AQI
110AQI
99AQI
122AQI
119AQI
92AQI
90AQI
90AQI
94AQI
102AQI
98AQI
100AQI
99AQI
112AQI
92AQI
63AQI
63AQI
75AQI
84AQI
82AQI
86AQI
89AQI
71AQI
82AQI
85AQI
89AQI
86AQI
69AQI
59AQI
67AQI
73AQI
64AQI
66AQI
64AQI
53AQI
63AQI
64AQI
74AQI
75AQI
83AQI
81AQI
80AQI
74AQI
64AQI
67AQI
61AQI
64AQI
60AQI
57AQI
60AQI
61AQI
67AQI
77AQI
77AQI
76AQI
70AQI
65AQI
71AQI
67AQI
64AQI
64AQI
66AQI
69AQI
70AQI
64AQI
62AQI
64AQI
67AQI
65AQI
61AQI
66AQI
57AQI
62AQI
60AQI
64AQI
63AQI
64AQI
61AQI
62AQI
69AQI
70AQI
64AQI
60AQI
63AQI
65AQI
65AQI
63AQI
69AQI
68AQI
55AQI
60AQI
62AQI
62AQI
62AQI
58AQI
57AQI
56AQI
57AQI
57AQI
62AQI
60AQI
51AQI
61AQI
60AQI
57AQI
58AQI
70AQI
73AQI
78AQI
77AQI
69AQI
70AQI
71AQI
73AQI
71AQI
73AQI
76AQI
79AQI
75AQI
83AQI
74AQI
56AQI
59AQI
61AQI
68AQI
74AQI
68AQI
77AQI
85AQI
91AQI
105AQI
74AQI
100AQI
114AQI
105AQI
123AQI
77AQI
94AQI
115AQI
101AQI
65AQI
115AQI
103AQI
107AQI
96AQI
91AQI
76AQI
65AQI
62AQI
77AQI
96AQI
No. of days
202588AQI
Highest AQI recorded in
January115AQI
Lowest AQI recorded in
August62AQI
202486AQI
Highest AQI recorded in
October124AQI
Lowest AQI recorded in
January65AQI
202398AQI
Highest AQI recorded in
March131AQI
Lowest AQI recorded in
December54AQI
202299AQI
Highest AQI recorded in
January129AQI
Lowest AQI recorded in
July63AQI
2021107AQI
Highest AQI recorded in
March145AQI
Lowest AQI recorded in
July72AQI
2020115AQI
Highest AQI recorded in
December135AQI
Lowest AQI recorded in
March94AQI
Most & Least Polluted Years Over the Last 6 Years
Hejian City Government's annual 2025 AQI (88) shows an average percentage change of -12.06% (improved AQI) compared to previous years: 2020 (115), 2021 (107), 2022 (99), 2023 (98), 2024 (86).