Hanoi Environmental Protection Department, Hanoi, Ha Noi, Vietnam Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
February Air Quality Analysis
Hanoi Environmental Protection Department, Hanoi, Ha Noi, Vietnam
AQI Trends: Highest and Lowest
Same Day Analysis (16th February):
On this day, AQI across the 4 years varied significantly: 2026 ranks 3rd highest AQI at 73 of Moderate air quality, showing improvement over 2025 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 15th Feb - 16th Feb 2026
Hanoi Environmental Protection Department, Hanoi, Ha Noi, Vietnam
6 AM15th Feb 2026
5 PM
5 AM16th Feb 2026
108AQI
76AQI
88AQI
68AQI
In the last 24 hours,
Hanoi Environmental Protection Department's AQI reached its highest point of 108 at 6 AM during the Day, while the lowest point, 68, was recorded at 7 PM during the Night between 15th Feb and 16th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Hanoi Environmental Protection Department, Hanoi, Ha Noi, Vietnam
22°C20/25°C
21°C19/24°C
20°C19/22°C
18°C14/19°C
12°C10/12°C
13°C11/17°C
15°C14/18°C
17°C16/20°C
19°C18/21°C
21°C18/26°C
21°C18/27°C
20°C17/24°C
20°C18/23°C
19°C17/20°C
18°C15/23°C
17°C16/19°C
19°C14/24°C
20°C16/27°C
21°C18/24°C
22°C20/26°C
23°C20/28°C
16°C13/18°C
14°C12/17°C
19°C16/24°C
20°C19/21°C
20°C19/23°C
21°C19/25°C
22°C20/26°C
23°C19/31°C
23°C20/28°C
110AQI
104AQI
111AQI
105AQI
2026 Days Vs Air Quality
Hanoi Environmental Protection Department, Hanoi, Ha Noi, Vietnam
2%
1
38%
18
32%
15
28%
13
Total number of days with different AQI categories in last 48 days in 2026 (317 days remaining)
Under WHO’s Safe Air Quality Limits: 2%
Health Risk Level:
Extreme
In 2026, 2% of 48 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
Hanoi Environmental Protection Department, Hanoi, Ha Noi, Vietnam
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
123AQI (US)
68AQI (US)
109AQI (US)
150AQI (US)
112AQI (US)
70AQI (US)
116AQI (US)
141AQI (US)
183AQI (US)
167AQI (US)
167AQI (US)
161AQI (US)
185AQI (US)
171AQI (US)
167AQI (US)
156AQI (US)
135AQI (US)
134AQI (US)
136AQI (US)
109AQI (US)
95AQI (US)
65AQI (US)
73AQI (US)
91AQI (US)
138AQI (US)
157AQI (US)
158AQI (US)
150AQI (US)
134AQI (US)
90AQI (US)
87AQI (US)
79AQI (US)
111AQI (US)
151AQI (US)
156AQI (US)
149AQI (US)
154AQI (US)
80AQI (US)
83AQI (US)
33AQI (US)
91AQI (US)
84AQI (US)
86AQI (US)
85AQI (US)
73AQI (US)
90AQI (US)
73AQI (US)
129AQI (US)
99AQI (US)
No. of days
2026119AQI (US)
Highest AQI (US) recorded in
January129AQI (US)
Lowest AQI (US) recorded in
February99AQI (US)
202588AQI (US)
Highest AQI (US) recorded in
December147AQI (US)
Lowest AQI (US) recorded in
August48AQI (US)
202472AQI (US)
Highest AQI (US) recorded in
January122AQI (US)
Lowest AQI (US) recorded in
August33AQI (US)
202379AQI (US)
Highest AQI (US) recorded in
January120AQI (US)
Lowest AQI (US) recorded in
November5AQI (US)
202254AQI (US)
Highest AQI (US) recorded in
December88AQI (US)
Lowest AQI (US) recorded in
July5AQI (US)
202177AQI (US)
Highest AQI (US) recorded in
January133AQI (US)
Lowest AQI (US) recorded in
July52AQI (US)
202070AQI (US)
Highest AQI (US) recorded in
December100AQI (US)
Lowest AQI (US) recorded in
June0AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Hanoi Environmental Protection Department's annual 2026 AQI (US) (119) shows an average percentage change of 65.3% (worsened AQI (US)) compared to previous years: 2020 (70), 2021 (77), 2022 (54), 2023 (79), 2024 (72), 2025 (88).