Quang Ninh Yen My, 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 Yen My, Ha Long, Quang Ninh, Vietnam
AQI Trends: Highest and Lowest
Same Day Analysis (6th October ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 2nd highest AQI at 85 of Moderate air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 6th Oct - 7th Oct 2025
Quang Ninh Yen My, Ha Long, Quang Ninh, Vietnam
5 AM6th Oct 2025
5 PM
4 AM7th Oct 2025
72AQI
56AQI
65AQI
61AQI
In the last 24 hours,
Quang Ninh Yen My's AQI reached its highest point of 72 at 5 AM during the Day, while the lowest point, undefined, was recorded at 4 AM during the Night between 6th Oct and 7th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Quang Ninh Yen My, Ha Long, Quang Ninh, Vietnam
29°C25/33°C
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
50AQI
40AQI
50AQI
45AQI
2025 Days Vs Air Quality
Quang Ninh Yen My, Ha Long, Quang Ninh, Vietnam
30%
83
58%
163
11%
30
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: 30%
Health Risk Level:
High
In 2025, 30% of 280 days were within WHO’s safe air quality limits. The risk of health issues is High, with respiratory problems, heart disease, skin issues, and stress being more common, particularly among children and the elderly.
Annual Air Quality Insights
Quang Ninh Yen My, Ha Long, Quang Ninh, Vietnam
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
142AQI
139AQI
115AQI
123AQI
135AQI
143AQI
128AQI
121AQI
129AQI
92AQI
104AQI
104AQI
122AQI
135AQI
134AQI
138AQI
146AQI
154AQI
157AQI
173AQI
139AQI
125AQI
111AQI
106AQI
87AQI
62AQI
79AQI
78AQI
117AQI
87AQI
89AQI
78AQI
67AQI
54AQI
66AQI
97AQI
79AQI
55AQI
65AQI
83AQI
131AQI
134AQI
143AQI
125AQI
117AQI
121AQI
74AQI
100AQI
67AQI
84AQI
82AQI
91AQI
94AQI
65AQI
70AQI
90AQI
72AQI
116AQI
72AQI
93AQI
73AQI
74AQI
74AQI
77AQI
63AQI
68AQI
86AQI
98AQI
115AQI
84AQI
82AQI
70AQI
64AQI
62AQI
55AQI
76AQI
71AQI
74AQI
72AQI
64AQI
65AQI
56AQI
58AQI
62AQI
63AQI
72AQI
72AQI
50AQI
37AQI
37AQI
50AQI
57AQI
64AQI
120AQI
79AQI
82AQI
80AQI
87AQI
79AQI
77AQI
75AQI
79AQI
76AQI
81AQI
82AQI
84AQI
80AQI
80AQI
73AQI
64AQI
66AQI
66AQI
59AQI
60AQI
56AQI
58AQI
56AQI
57AQI
73AQI
65AQI
60AQI
61AQI
59AQI
62AQI
62AQI
58AQI
58AQI
59AQI
59AQI
61AQI
54AQI
60AQI
59AQI
57AQI
54AQI
55AQI
51AQI
53AQI
51AQI
52AQI
53AQI
50AQI
49AQI
50AQI
53AQI
58AQI
58AQI
58AQI
51AQI
52AQI
51AQI
48AQI
49AQI
50AQI
51AQI
53AQI
51AQI
51AQI
50AQI
52AQI
52AQI
53AQI
49AQI
51AQI
53AQI
55AQI
56AQI
55AQI
53AQI
57AQI
64AQI
50AQI
39AQI
45AQI
54AQI
48AQI
49AQI
42AQI
47AQI
40AQI
47AQI
39AQI
34AQI
38AQI
52AQI
51AQI
53AQI
54AQI
51AQI
74AQI
49AQI
47AQI
46AQI
51AQI
57AQI
55AQI
51AQI
49AQI
53AQI
59AQI
51AQI
43AQI
38AQI
37AQI
36AQI
42AQI
46AQI
46AQI
47AQI
59AQI
55AQI
52AQI
51AQI
52AQI
56AQI
56AQI
54AQI
52AQI
51AQI
51AQI
53AQI
50AQI
51AQI
48AQI
49AQI
53AQI
40AQI
37AQI
35AQI
33AQI
34AQI
40AQI
40AQI
41AQI
40AQI
40AQI
34AQI
33AQI
39AQI
45AQI
46AQI
41AQI
40AQI
40AQI
42AQI
39AQI
36AQI
38AQI
37AQI
48AQI
53AQI
43AQI
46AQI
39AQI
38AQI
36AQI
38AQI
37AQI
39AQI
37AQI
29AQI
34AQI
50AQI
54AQI
47AQI
53AQI
45AQI
31AQI
24AQI
18AQI
20AQI
32AQI
45AQI
65AQI
80AQI
72AQI
73AQI
80AQI
85AQI
120AQI
89AQI
70AQI
72AQI
56AQI
50AQI
49AQI
45AQI
39AQI
76AQI
No. of days
202566AQI
Highest AQI recorded in
January120AQI
Lowest AQI recorded in
September39AQI
202449AQI
Highest AQI recorded in
December95AQI
Lowest AQI recorded in
April14AQI
202338AQI
Highest AQI recorded in
November51AQI
Lowest AQI recorded in
December37AQI
202019AQI
Highest AQI recorded in
June19AQI
Lowest AQI recorded in
June19AQI
Most & Least Polluted Years Over the Last 4 Years
Quang Ninh Yen My's annual 2025 AQI (66) shows an average percentage change of 117.1% (worsened AQI) compared to previous years: 2020 (19), 2023 (38), 2024 (49).