Vietnam · Hanoi · 5 cities
Air quality in Hanoi today The AQI right now, city by city
Right now, Ba Vì has the cleanest air of the 5 cities we track in Hanoi (AQI 29, Good), and Hanoi the worst (AQI 154, Unhealthy). Sơn Tây has the most tree cover, at 52.7% — #18 of 112 cities measured in Vietnam.
Every city is measured the same way, over the same 2 km around its center: the air quality right now, from ground stations where there are any, and its tree cover.
AQI 111
Average right now
Unhealthy for sensitive groups
- cities tracked
- 5
- average tree cover
- 48.3%
- Vietnam: 35.8%
- worst air now: Hanoi
- 154
- cleanest air now: Ba Vì
- 29
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf, refreshed hourly.
Hanoi · average AQI 111
Air quality today across Hanoi, city by city
| Hanoi | 154Unhealthy | 18.7% | 65.6K | #96 of 112 |
|---|---|---|---|---|
| Bắc Từ Liêm | 152Unhealthy | 37.9% | 6.6K | #42 of 112 |
| Gia Lâm | 153Unhealthy | 36.6% | 10.6K | #45 of 112 |
| Ba Vì | 29Good | 95.7% | — | — |
| Sơn Tây | 69Moderate | 52.7% | — | #18 of 112 |
Air quality is the US AQI from ground monitoring stations via OpenAQ where available, otherwise the Open-Meteo / CAMS model, refreshed hourly. Tree cover is measured within 2 km of each city center from Sentinel-2 imagery; the rank compares every city measured in Vietnam.
Deforestation · 2001–2025
How much forest has Hanoi lost?
Since 2001, Hanoi has lost about 1,590 hectares of forest (about 2,200 football pitches): 4% of the forest it had in 2000. Most of it (53%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
- Forest lost since 2001
- 1,590 haabout 2,200 football pitches
- Share of its forest
- 4%of what there was in 2000
- Cleared for good
- 837 hadeforestation: turned into farms, mines or towns
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 81 ha | 37 ha | 117 ha |
| 2002 | 27 ha | 13 ha | 40 ha |
| 2003 | 42 ha | 24 ha | 67 ha |
| 2004 | 34 ha | 15 ha | 48 ha |
| 2005 | 58 ha | 19 ha | 77 ha |
| 2006 | 32 ha | 21 ha | 53 ha |
| 2007 | 82 ha | 35 ha | 117 ha |
| 2008 | 76 ha | 39 ha | 115 ha |
| 2009 | 77 ha | 56 ha | 133 ha |
| 2010 | 115 ha | 79 ha | 194 ha |
| 2011 | 50 ha | 23 ha | 73 ha |
| 2012 | 44 ha | 27 ha | 71 ha |
| 2013 | 6 ha | 5 ha | 11 ha |
| 2014 | 5 ha | 17 ha | 22 ha |
| 2015 | 7 ha | 19 ha | 26 ha |
| 2016 | 12 ha | 88 ha | 100 ha |
| 2017 | 17 ha | 89 ha | 106 ha |
| 2018 | 20 ha | 45 ha | 65 ha |
| 2019 | 9 ha | 11 ha | 20 ha |
| 2020 | 2 ha | 3 ha | 5 ha |
| 2021 | 9 ha | 6 ha | 16 ha |
| 2022 | 15 ha | 14 ha | 29 ha |
| 2023 | 7 ha | 16 ha | 23 ha |
| 2024 | 2 ha | 8 ha | 10 ha |
| 2025 | 8 ha | 42 ha | 50 ha |
Forest loss is slowing down: about 26 hectares a year in 2021–2025, down from 59 hectares a year in 2016–2020. The worst year was 2010, when about 194 hectares of forest were lost.
What is causing deforestation in Hanoi?
- Farms, pasture and plantationscleared for good46% · 730 ha
- Loggingcan grow back29% · 466 ha
- Towns and roadscleared for good6.1% · 98 ha
Also: shifting farming, storms, floods and other natural causes, mining and energy, wildfires, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. How it's measured
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