Shanhai Pass, Qinhuangdao, 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
Shanhai Pass, Qinhuangdao, Hebei, China
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 77 of Moderate air quality, showing improvement over 2024, 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Shanhai Pass, Qinhuangdao, Hebei, China
5 AM4th Oct 2025
6 PM
4 AM5th Oct 2025
AQI
AQI
144AQI
65AQI
In the last 24 hours,
Shanhai Pass's AQI reached its highest point of 144 at 3 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Shanhai Pass, Qinhuangdao, Hebei, China
23°C20/27°C
23°C19/29°C
23°C19/28°C
23°C20/28°C
23°C19/28°C
23°C19/27°C
23°C21/27°C
23°C20/27°C
23°C19/27°C
23°C19/30°C
22°C18/25°C
22°C17/28°C
18°C14/23°C
19°C15/24°C
19°C16/23°C
19°C15/24°C
20°C17/24°C
20°C19/24°C
20°C18/23°C
20°C15/25°C
22°C17/28°C
22°C19/27°C
20°C18/23°C
21°C16/27°C
22°C18/28°C
22°C17/27°C
23°C19/29°C
22°C19/27°C
19°C17/23°C
--°C/°C
--°C/°C
79AQI
72AQI
88AQI
80AQI
2025 Days Vs Air Quality
Shanhai Pass, Qinhuangdao, Hebei, China
2%
5
78%
215
18%
50
2%
6
Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)
Under WHO’s Safe Air Quality Limits: 2%
Health Risk Level:
Extreme
In 2025, 2% of 277 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
Shanhai Pass, Qinhuangdao, Hebei, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
80AQI
81AQI
68AQI
119AQI
105AQI
89AQI
70AQI
65AQI
64AQI
68AQI
80AQI
97AQI
107AQI
76AQI
78AQI
69AQI
112AQI
139AQI
100AQI
139AQI
93AQI
104AQI
116AQI
137AQI
138AQI
152AQI
82AQI
106AQI
106AQI
93AQI
101AQI
114AQI
139AQI
75AQI
87AQI
62AQI
70AQI
53AQI
57AQI
76AQI
115AQI
134AQI
87AQI
121AQI
122AQI
119AQI
82AQI
76AQI
72AQI
74AQI
73AQI
72AQI
74AQI
61AQI
78AQI
98AQI
88AQI
150AQI
173AQI
164AQI
106AQI
91AQI
103AQI
124AQI
79AQI
106AQI
133AQI
163AQI
160AQI
169AQI
95AQI
109AQI
84AQI
84AQI
67AQI
73AQI
62AQI
83AQI
61AQI
63AQI
61AQI
100AQI
67AQI
92AQI
119AQI
81AQI
86AQI
67AQI
74AQI
114AQI
109AQI
75AQI
96AQI
99AQI
66AQI
85AQI
119AQI
75AQI
89AQI
115AQI
104AQI
97AQI
68AQI
73AQI
90AQI
102AQI
112AQI
75AQI
95AQI
100AQI
99AQI
69AQI
95AQI
57AQI
69AQI
94AQI
63AQI
81AQI
100AQI
100AQI
72AQI
72AQI
62AQI
67AQI
78AQI
73AQI
97AQI
81AQI
77AQI
71AQI
107AQI
114AQI
106AQI
97AQI
93AQI
89AQI
79AQI
80AQI
98AQI
110AQI
96AQI
126AQI
82AQI
83AQI
78AQI
95AQI
115AQI
99AQI
100AQI
110AQI
115AQI
93AQI
110AQI
64AQI
65AQI
72AQI
75AQI
67AQI
68AQI
73AQI
61AQI
74AQI
74AQI
68AQI
66AQI
59AQI
58AQI
62AQI
66AQI
66AQI
63AQI
59AQI
56AQI
62AQI
61AQI
63AQI
65AQI
65AQI
63AQI
75AQI
69AQI
69AQI
71AQI
59AQI
70AQI
72AQI
62AQI
64AQI
64AQI
64AQI
66AQI
65AQI
65AQI
61AQI
59AQI
60AQI
59AQI
55AQI
56AQI
53AQI
57AQI
63AQI
66AQI
53AQI
53AQI
59AQI
61AQI
59AQI
55AQI
50AQI
50AQI
57AQI
61AQI
61AQI
58AQI
53AQI
56AQI
62AQI
55AQI
48AQI
48AQI
54AQI
58AQI
64AQI
58AQI
62AQI
64AQI
59AQI
58AQI
63AQI
60AQI
60AQI
60AQI
57AQI
61AQI
58AQI
57AQI
56AQI
58AQI
54AQI
62AQI
62AQI
59AQI
62AQI
71AQI
76AQI
86AQI
82AQI
72AQI
70AQI
68AQI
79AQI
70AQI
75AQI
77AQI
72AQI
72AQI
64AQI
65AQI
50AQI
51AQI
62AQI
65AQI
64AQI
59AQI
58AQI
75AQI
95AQI
130AQI
117AQI
113AQI
87AQI
103AQI
123AQI
130AQI
77AQI
98AQI
93AQI
98AQI
89AQI
91AQI
68AQI
61AQI
58AQI
76AQI
110AQI
No. of days
202582AQI
Highest AQI recorded in
October110AQI
Lowest AQI recorded in
August58AQI
202496AQI
Highest AQI recorded in
March116AQI
Lowest AQI recorded in
September69AQI
202395AQI
Highest AQI recorded in
March132AQI
Lowest AQI recorded in
July61AQI
202286AQI
Highest AQI recorded in
August117AQI
Lowest AQI recorded in
July55AQI
202192AQI
Highest AQI recorded in
March152AQI
Lowest AQI recorded in
September50AQI
202083AQI
Highest AQI recorded in
December112AQI
Lowest AQI recorded in
September57AQI
Most & Least Polluted Years Over the Last 6 Years
Shanhai Pass's annual 2025 AQI (82) shows an average percentage change of -9.3% (improved AQI) compared to previous years: 2020 (83), 2021 (92), 2022 (86), 2023 (95), 2024 (96).