City report · Hanoi, Vietnam
Gia Lâm Air quality today
Air quality in Gia Lâm currently reads AQI 147 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Air quality right now
AQI 147
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 54.1
- tree cover
- 36.6%
- trees in this area
- 114K
- more trees needed
- 0
Measured across a 2 km radius around Chính Trung, tt. Trâu Quỳ, Gia Lâm, Hà Nội, Vietnam (12.57 km²), from a satellite image of Aug 10, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Gia Lâm · AQI 147 (Unhealthy for sensitive groups)
Gia Lâm's tree count comes to 114,062 trees across 12.47 km² of land, already at or above the 35% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Gia Lâm today: AQI 147, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 23:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Dragon, 3 km away
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
54.1
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, srgillo
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Gia Lâm's daily AQI at 82 on average, from 44 on Nov 9 to an hourly peak of 157 on Nov 10.
Where Gia Lâm stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Gia Lâm: Healthy tree cover
36.6% tree cover against a 35% healthy-neighborhood target, across 12.47 km² of land.
Trees in this area
114,062
Target trees
114,062
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Gia Lâm lost?
There was very little forest around Gia Lâm in 2000, about 40 hectares, and about 5 hectares of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
2017: satellite photo from December 2017 of a 5 × 5 km area in the city center.
The worst year was 2005, when about 1 hectare of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | under 1 ha | under 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | 1 ha |
| 2005 | under 1 ha | under 1 ha | 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Gia Lâm?
- Towns and roadscleared for good17% · under 1 ha
- Unknown causescause unknown83% · 4 ha
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 1,200 ha
- Forest in 2020
- 1,720 ha
- Overall change
- +516 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Gia Lâm grew from about 1,200 hectares to 1,720 hectares, a net gain of about 516 hectares (+43%). New forest grew on about 521 hectares, while 5 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
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. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Gia Lâm
Same 2 km radius, same index — so they compare directly.
- Thuận Thanh14.8 km
Vietnam
- Tree cover
- 20%
- Air quality
- 147
- Mỹ Hào18.9 km
Vietnam
- Tree cover
- 23%
- Air quality
- 147
- Bắc Từ Liêm20.6 km
Vietnam
- Tree cover
- 38%
- Air quality
- 152
- Bắc Ninh23.3 km
Vietnam
- Tree cover
- 32%
- Air quality
- 99
- Phúc Yên34.2 km
Vietnam
- Tree cover
- 39%
- Air quality
- 119
- Bắc Giang38.7 km
Vietnam
- Tree cover
- 27%
- Air quality
- 52
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Frequently asked
Questions about Gia Lâm
What is the air quality (AQI) in Gia Lâm right now?
The latest reading for Gia Lâm shows an AQI of 147 (Unhealthy for sensitive groups), measured Nov 11, 23:00 local time by the Dragon ground monitoring station, 3 km away, via OpenAQ. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Gia Lâm today?
At AQI 147 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Gia Lâm been like this week?
Over the last 7 days, the CAMS air-quality model put Gia Lâm's daily AQI at 82 on average, from 44 on Nov 9 to an hourly peak of 157 on Nov 10. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Gia Lâm lost since 2001?
There was very little forest around Gia Lâm in 2000, about 40 hectares, and about 5 hectares of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here. Comparing satellite maps from 2000 and 2020, the forest around Gia Lâm grew from about 1,200 hectares to 1,720 hectares, a net gain of about 516 hectares (+43%). New forest grew on about 521 hectares, while 5 hectares were lost.
What is the tree count in Gia Lâm?
Gia Lâm has an estimated 114,062 trees across the 12.47 km² of land measured — 36.6% tree cover, already past the 35% tree-cover target set for this area.
How many more trees does Gia Lâm need?
Gia Lâm has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Gia Lâm's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Chính Trung, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Chính Trung; the tree count is an estimate derived from that cover.
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