Quang Ninh Gan KCN Cai Lan, Ha Long, Quang Ninh, Vietnam 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
Quang Ninh Gan KCN Cai Lan, Ha Long, Quang Ninh, Vietnam
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 79 of Moderate air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 7th Oct - 8th Oct 2025
Quang Ninh Gan KCN Cai Lan, Ha Long, Quang Ninh, Vietnam
5 AM7th Oct 2025
5 PM
4 AM8th Oct 2025
AQI
AQI
85AQI
68AQI
In the last 24 hours,
Quang Ninh Gan KCN Cai Lan's AQI reached its highest point of 85 at 1 AM during the Night, while the lowest point, undefined, was recorded at 5 PM during the Night between 7th Oct and 8th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Quang Ninh Gan KCN Cai Lan, Ha Long, Quang Ninh, Vietnam
29°C26/34°C
28°C27/29°C
28°C27/31°C
27°C26/29°C
28°C26/31°C
28°C25/31°C
27°C25/31°C
28°C26/30°C
28°C25/31°C
26°C25/29°C
27°C24/29°C
28°C25/32°C
29°C25/34°C
28°C25/31°C
27°C25/29°C
27°C24/30°C
28°C24/32°C
24°C23/24°C
26°C24/28°C
28°C25/32°C
25°C24/29°C
26°C25/26°C
26°C25/27°C
26°C24/29°C
27°C24/30°C
27°C24/30°C
27°C25/30°C
28°C24/34°C
25°C24/26°C
--°C/°C
--°C/°C
49AQI
41AQI
52AQI
45AQI
2025 Days Vs Air Quality
Quang Ninh Gan KCN Cai Lan, Ha Long, Quang Ninh, Vietnam
21%
58
68%
190
10%
28
1%
3
Total number of days with different AQI categories in last 280 days in 2025 (85 days remaining)
Under WHO’s Safe Air Quality Limits: 21%
Health Risk Level:
Very high
In 2025, 21% of 280 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.
Annual Air Quality Insights
Quang Ninh Gan KCN Cai Lan, Ha Long, Quang Ninh, Vietnam
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
134AQI
130AQI
103AQI
102AQI
112AQI
122AQI
111AQI
116AQI
126AQI
86AQI
97AQI
99AQI
118AQI
131AQI
124AQI
133AQI
146AQI
154AQI
158AQI
172AQI
134AQI
121AQI
110AQI
109AQI
87AQI
63AQI
80AQI
76AQI
123AQI
89AQI
90AQI
81AQI
68AQI
55AQI
64AQI
94AQI
78AQI
59AQI
64AQI
80AQI
126AQI
129AQI
132AQI
119AQI
111AQI
119AQI
71AQI
96AQI
63AQI
80AQI
79AQI
88AQI
91AQI
65AQI
72AQI
91AQI
74AQI
121AQI
73AQI
93AQI
72AQI
69AQI
70AQI
74AQI
70AQI
67AQI
87AQI
99AQI
119AQI
84AQI
82AQI
69AQI
63AQI
61AQI
53AQI
74AQI
71AQI
76AQI
76AQI
64AQI
66AQI
58AQI
60AQI
67AQI
67AQI
73AQI
71AQI
52AQI
39AQI
43AQI
50AQI
56AQI
63AQI
118AQI
80AQI
79AQI
80AQI
87AQI
79AQI
78AQI
74AQI
79AQI
77AQI
82AQI
84AQI
86AQI
81AQI
81AQI
76AQI
70AQI
72AQI
70AQI
64AQI
65AQI
58AQI
62AQI
61AQI
61AQI
83AQI
69AQI
63AQI
64AQI
62AQI
68AQI
72AQI
64AQI
62AQI
65AQI
62AQI
64AQI
57AQI
64AQI
62AQI
60AQI
58AQI
59AQI
57AQI
57AQI
53AQI
56AQI
61AQI
57AQI
52AQI
52AQI
56AQI
61AQI
61AQI
61AQI
56AQI
55AQI
54AQI
52AQI
53AQI
53AQI
54AQI
55AQI
55AQI
54AQI
54AQI
54AQI
54AQI
56AQI
52AQI
53AQI
56AQI
56AQI
57AQI
58AQI
57AQI
62AQI
60AQI
60AQI
60AQI
61AQI
61AQI
56AQI
54AQI
50AQI
52AQI
46AQI
52AQI
41AQI
42AQI
44AQI
54AQI
55AQI
52AQI
58AQI
56AQI
58AQI
54AQI
53AQI
57AQI
65AQI
64AQI
62AQI
56AQI
57AQI
57AQI
61AQI
54AQI
47AQI
44AQI
44AQI
41AQI
48AQI
54AQI
53AQI
53AQI
61AQI
57AQI
56AQI
53AQI
55AQI
57AQI
57AQI
56AQI
53AQI
57AQI
54AQI
61AQI
61AQI
52AQI
50AQI
50AQI
53AQI
40AQI
38AQI
35AQI
34AQI
36AQI
42AQI
41AQI
41AQI
40AQI
43AQI
35AQI
35AQI
40AQI
46AQI
47AQI
42AQI
41AQI
41AQI
42AQI
39AQI
34AQI
39AQI
38AQI
49AQI
53AQI
43AQI
46AQI
41AQI
39AQI
37AQI
38AQI
38AQI
41AQI
38AQI
32AQI
40AQI
51AQI
54AQI
50AQI
55AQI
48AQI
34AQI
26AQI
20AQI
21AQI
36AQI
47AQI
65AQI
76AQI
67AQI
71AQI
79AQI
79AQI
115AQI
87AQI
71AQI
74AQI
60AQI
55AQI
53AQI
47AQI
40AQI
73AQI
No. of days
202567AQI
Highest AQI recorded in
January115AQI
Lowest AQI recorded in
September40AQI
202439AQI
Highest AQI recorded in
December85AQI
Lowest AQI recorded in
April21AQI
202333AQI
Highest AQI recorded in
July209AQI
Lowest AQI recorded in
September15AQI
202235AQI
Highest AQI recorded in
August78AQI
Lowest AQI recorded in
July23AQI
202135AQI
Highest AQI recorded in
May57AQI
Lowest AQI recorded in
April10AQI
Most & Least Polluted Years Over the Last 5 Years
Quang Ninh Gan KCN Cai Lan's annual 2025 AQI (67) shows an average percentage change of 87.8% (worsened AQI) compared to previous years: 2021 (35), 2022 (35), 2023 (33), 2024 (39).