Air quality
Air quality in Tây Hồ today
Updated
Unhealthy for Sensitive Groups (US AQI 112) 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, 3:34 am (20:34 UTC).
Live AQI, PM2.5, PM10 and ozone for Tây Hồ, Hanoi, Vietnam, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 112 Unhealthy for Sensitive Groups
- PM2.5
- 69 µg/m³ 4.6× WHO 24-h guideline
- PM10
- 71 µg/m³
- Ozone
- 58 µg/m³
Air quality in Tây Hồ right now
Right now the modelled US Air Quality Index for Tây Hồ, Hanoi, Vietnam is 112, 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 69 µg/m³, 4.6 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 71 µg/m³ against a guideline of 45; ozone is 58 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 32 µg/m³ (above the 24-hour guideline of 25).
Tây Hồ vs the rest of Vietnam
Across 64 Vietnam cities we track, the average US AQI right now is 83 (Moderate). Tây Hồ at 112 is 29 points worse than average.
It ranks 61 of 64 from cleanest to most polluted; the cleanest is Phu Quoc (38) and the most polluted Mỹ Hào (112).
For context, the median across 3,556 cities worldwide is 58.
Air quality in cities near Tây Hồ
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Ba Dinh | 4 km | 112 | Unhealthy for Sensitive Groups | 68.7 |
| Cầu Giấy | 4 km | 112 | Unhealthy for Sensitive Groups | 68.7 |
| Hanoi | 6 km | 112 | Unhealthy for Sensitive Groups | 68.7 |
| Hoàn Kiếm | 6 km | 112 | Unhealthy for Sensitive Groups | 68.7 |
| Đống Đa | 6 km | 112 | Unhealthy for Sensitive Groups | 68.7 |
| Bắc Từ Liêm | 7 km | 112 | Unhealthy for Sensitive Groups | 68.7 |
| Hai Bà Trưng | 7 km | 112 | Unhealthy for Sensitive Groups | 68.7 |
| Thanh Xuân | 8 km | 112 | Unhealthy for Sensitive Groups | 68.7 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Tây Hồ, 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 69 µg/m³ in the next 24 hours while NASA satellites detected 140 fire hotspots within 300 km in the last day (nearest about 26 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 112, 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 Tây Hồ
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.