City report · Phu Tho, Vietnam
Vĩnh Yên Air quality today
Air quality in Vĩnh Yên currently reads AQI 112 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 112
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 40.0
- tree cover
- 39.1%
- trees in this area
- 117K
- more trees needed
- 0
Measured across a 2 km radius around Vinh Phuc, Phu Tho, Vietnam (12.57 km²), from a satellite image of Aug 10, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Vĩnh Yên · AQI 112 (Unhealthy for sensitive groups)
Vĩnh Yên's tree count comes to 116,817 trees across 11.95 km² of land, already at or above the 35% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Vĩnh Yên today: AQI 112, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 22:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Viet Tri, Vietnam (Tp Việt Trì), 24.8 km away
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
40.0
PM10
97.4
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Vietnam Center For Environmental Monitoring Portal (cổng thông tin quan trắc môi trường)
- 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 Vĩnh Yên's daily AQI at 73 on average, from 47 on Nov 9 to an hourly peak of 132 on Nov 8.
Where Vĩnh Yên stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Vĩnh Yên: Healthy tree cover
39.1% tree cover against a 35% healthy-neighborhood target, across 11.95 km² of land.
Trees in this area
116,817
Target trees
116,817
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Vĩnh Yên lost?
Since 2001, the area within 10 km of Vĩnh Yên has lost about 130 hectares of forest (about 180 football pitches): 55% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 12 hectares (9.5%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from December 2017 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 130 haabout 180 football pitches
- Share of its forest
- 55%of what there was in 2000
- Cleared for good
- 12 hadeforestation: turned into farms, mines or towns
The worst year was 2021, when about 22 hectares 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 | 2 ha | 2 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 | 3 ha | 4 ha |
| 2005 | under 1 ha | 2 ha | 2 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | 4 ha | 4 ha |
| 2008 | under 1 ha | 11 ha | 12 ha |
| 2009 | under 1 ha | 2 ha | 2 ha |
| 2010 | under 1 ha | 6 ha | 6 ha |
| 2011 | under 1 ha | 4 ha | 5 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | 1 ha | under 1 ha | 2 ha |
| 2014 | under 1 ha | 3 ha | 3 ha |
| 2015 | under 1 ha | 5 ha | 5 ha |
| 2016 | under 1 ha | 4 ha | 4 ha |
| 2017 | under 1 ha | 4 ha | 4 ha |
| 2018 | under 1 ha | 19 ha | 19 ha |
| 2019 | under 1 ha | 6 ha | 7 ha |
| 2020 | under 1 ha | 2 ha | 2 ha |
| 2021 | 1 ha | 21 ha | 22 ha |
| 2022 | 2 ha | 6 ha | 8 ha |
| 2023 | 2 ha | 5 ha | 7 ha |
| 2024 | 1 ha | 2 ha | 3 ha |
| 2025 | under 1 ha | 5 ha | 5 ha |
What is causing deforestation around Vĩnh Yên?
- Loggingcan grow back90% · 117 ha
- Towns and roadscleared for good5.9% · 8 ha
- Farms, pasture and plantationscleared for good3.7% · 5 ha
Also: unknown causes.
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
- 5,410 ha
- Forest in 2020
- 6,510 ha
- Overall change
- +1,100 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Vĩnh Yên grew from about 5,410 hectares to 6,510 hectares, a net gain of about 1,100 hectares (+20%). New forest grew on about 1,190 hectares, while 90 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 Vĩnh Yên
Same 2 km radius, same index — so they compare directly.
- Phúc Yên13.1 km
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- Tree cover
- 39%
- Air quality
- 119
- Việt Trì21.1 km
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- Tree cover
- 40%
- Air quality
- 112
- Sơn Tây21.3 km
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- Tree cover
- 53%
- Air quality
- 69
- Bắc Từ Liêm30.8 km
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- Tree cover
- 38%
- Air quality
- 152
- Thành phố Sông Công30.8 km
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- Tree cover
- 57%
- Air quality
- 58
- Phổ Yên32.0 km
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- Tree cover
- 38%
- Air quality
- 52
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Frequently asked
Questions about Vĩnh Yên
What is the air quality (AQI) in Vĩnh Yên right now?
The latest reading for Vĩnh Yên shows an AQI of 112 (Unhealthy for sensitive groups), measured Nov 11, 22:00 local time by the Viet Tri, Vietnam (Tp Việt Trì) ground monitoring station, 24.8 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 Vĩnh Yên today?
At AQI 112 (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 Vĩnh Yên been like this week?
Over the last 7 days, the CAMS air-quality model put Vĩnh Yên's daily AQI at 73 on average, from 47 on Nov 9 to an hourly peak of 132 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Vĩnh Yên lost since 2001?
Since 2001, the area within 10 km of Vĩnh Yên has lost about 130 hectares of forest (about 180 football pitches): 55% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 12 hectares (9.5%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Vĩnh Yên grew from about 5,410 hectares to 6,510 hectares, a net gain of about 1,100 hectares (+20%). New forest grew on about 1,190 hectares, while 90 hectares were lost.
What is the tree count in Vĩnh Yên?
Vĩnh Yên has an estimated 116,817 trees across the 11.95 km² of land measured — 39.1% tree cover, already past the 35% tree-cover target set for this area.
How many more trees does Vĩnh Yên need?
Vĩnh Yên has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Vĩnh Yên's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Vinh Phuc, 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 Vinh Phuc; the tree count is an estimate derived from that cover.
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