Daily report · most polluted
Vietnam air quality on 18 October 2026
Bắc Ninh Bắc Ninh76
ModerateUS AQI
Bắc Ninh had the most polluted air of 12 Vietnamese cities
Updated · CEM
At 3:00 pm ICT on 18 October 2026, 12 Vietnamese cities were reporting. Bắc Ninh had the most polluted air at US AQI 76 (Moderate), followed by Ninh Bình (67) and Nam Định (62). The median across all cities was 57, down from 63 the day before. 0 cities were at Unhealthy or worse (0 the day before). Lâm Đồng had the cleanest air at 18.
The biggest deterioration was in Ninh Bình, from 63 to 67. Hanoi improved most, from 87 to 57.
- Good 3
- Moderate 9
10 most polluted cities
| # | City | Province | US AQI | Change |
|---|---|---|---|---|
| 1 | Bắc Ninh | Bắc Ninh | 76Moderate | ▼ 4 |
| 2 | Ninh Bình | Ninh Bình | 67Moderate | ▲ 4 |
| 3 | Nam Định | Nam Định | 62Moderate | ▲ 1 |
| 4 | Quảng Ngãi | Quảng Ngãi | 61Moderate | ▼ 19 |
| 5 | Haiphong | Hải Phòng | 58Moderate | ▼ 8 |
| 6 | Da Nang | Đà Nẵng | 57Moderate | ▼ 9 |
| 7 | Hanoi | Hà Nội | 57Moderate | ▼ 30 |
| 8 | Quảng Ninh | Quảng Ninh | 52Moderate | ▼ 3 |
| 9 | Ho Chi Minh City | Hồ Chí Minh | 51Moderate | ▼ 29 |
| 10 | Hà Tĩnh | Hà Tĩnh | 44Good | ▼ 13 |
10 cleanest cities
| # | City | Province | US AQI | Change |
|---|---|---|---|---|
| 1 | Lâm Đồng | Lâm Đồng | 18Good | ▼ 18 |
| 2 | Thừa Thiên Huế | Thừa Thiên Huế | 22Good | ▼ 14 |
| 3 | Hà Tĩnh | Hà Tĩnh | 44Good | ▼ 13 |
| 4 | Ho Chi Minh City | Hồ Chí Minh | 51Moderate | ▼ 29 |
| 5 | Quảng Ninh | Quảng Ninh | 52Moderate | ▼ 3 |
| 6 | Hanoi | Hà Nội | 57Moderate | ▼ 30 |
| 7 | Da Nang | Đà Nẵng | 57Moderate | ▼ 9 |
| 8 | Haiphong | Hải Phòng | 58Moderate | ▼ 8 |
| 9 | Quảng Ngãi | Quảng Ngãi | 61Moderate | ▼ 19 |
| 10 | Nam Định | Nam Định | 62Moderate | ▲ 1 |
Biggest rises
All 12 cities on 18 October 2026
| # | City | Province | US AQI | Change |
|---|---|---|---|---|
| 1 | Bắc Ninh | Bắc Ninh | 76Moderate | ▼ 4 |
| 2 | Ninh Bình | Ninh Bình | 67Moderate | ▲ 4 |
| 3 | Nam Định | Nam Định | 62Moderate | ▲ 1 |
| 4 | Quảng Ngãi | Quảng Ngãi | 61Moderate | ▼ 19 |
| 5 | Haiphong | Hải Phòng | 58Moderate | ▼ 8 |
| 6 | Da Nang | Đà Nẵng | 57Moderate | ▼ 9 |
| 7 | Hanoi | Hà Nội | 57Moderate | ▼ 30 |
| 8 | Quảng Ninh | Quảng Ninh | 52Moderate | ▼ 3 |
| 9 | Ho Chi Minh City | Hồ Chí Minh | 51Moderate | ▼ 29 |
| 10 | Hà Tĩnh | Hà Tĩnh | 44Good | ▼ 13 |
| 11 | Thừa Thiên Huế | Thừa Thiên Huế | 22Good | ▼ 14 |
| 12 | Lâm Đồng | Lâm Đồng | 18Good | ▼ 18 |
Snapshot taken at 3:00 pm ICT from Center for Environmental Monitoring (CEM) · Envisoft. Values are the latest hourly readings at that time, not daily averages. Cities with no reading are left out.