Air quality
Air quality in Long Bien today
Updated
Unhealthy for Sensitive Groups (US AQI 109) People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. Model estimate for Mon, Oct 26, 2:34 am (19:34 UTC).
Live AQI, PM2.5, PM10 and ozone for Long Bien, Hanoi, Vietnam, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 109 Unhealthy for Sensitive Groups
- PM2.5
- 66 µg/m³ 4.4× WHO 24-h guideline
- PM10
- 68 µg/m³
- Ozone
- 61 µg/m³
Air quality in Long Bien right now
Right now the modelled US Air Quality Index for Long Bien, Hanoi, Vietnam is 109, which falls in the "Unhealthy for Sensitive Groups" band (up to 150). People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors.
PM2.5 is 66 µg/m³, 4.4 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 68 µg/m³ against a guideline of 45; ozone is 61 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 33 µg/m³ (above the 24-hour guideline of 25).
Long Bien vs the rest of Vietnam
Across 68 Vietnam cities we track, the average US AQI right now is 82 (Moderate). Long Bien at 109 is 27 points worse than average.
It ranks 54 of 68 from cleanest to most polluted; the cleanest is Phu Quoc (38) and the most polluted Hạ Long (118).
For context, the median across 3,909 cities worldwide is 56.
Air quality in cities near Long Bien
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Gia Lâm | 4 km | 109 | Unhealthy for Sensitive Groups | 66.4 |
| Hoàn Kiếm | 5 km | 109 | Unhealthy for Sensitive Groups | 66.4 |
| Hai Bà Trưng | 6 km | 109 | Unhealthy for Sensitive Groups | 66.4 |
| Hanoi | 6 km | 109 | Unhealthy for Sensitive Groups | 66.4 |
| Tương Mai | 7 km | 109 | Unhealthy for Sensitive Groups | 66.4 |
| Ba Dinh | 8 km | 109 | Unhealthy for Sensitive Groups | 66.4 |
| Đống Đa | 8 km | 109 | Unhealthy for Sensitive Groups | 66.4 |
| Tây Hồ | 10 km | 109 | Unhealthy for Sensitive Groups | 66.4 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Long Bien, so the numbers on this page are model estimates. Models capture regional pollution well but can miss very local sources such as a busy road or a nearby fire.
Wildfire smoke
PM2.5 is forecast to reach 66 µg/m³ in the next 24 hours while NASA satellites detected 136 fire hotspots within 300 km in the last day (nearest about 29 km away). Smoke is a likely contributor: keep windows closed, run an air purifier or HVAC filter, and check the fire map before heading out.
Advice for sensitive groups
At 109, children, older adults, pregnant people and anyone with asthma, COPD or heart disease should limit time outdoors, especially strenuous activity. A well-fitted N95/FFP2 mask cuts particle exposure; it does not filter ozone.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Long Bien
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.