City report · Thai Nguyen, Vietnam
Phổ Yên Air quality today
Air quality in Phổ Yên currently reads AQI 52 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 52
Moderate
- PM2.5, fine particles (µg/m³)
- 12.4
- tree cover
- 37.5%
- trees in this area
- 118K
- more trees needed
- 0
Measured across a 2 km radius around Van Xuan, Thai Nguyen, Vietnam (12.57 km²), from a satellite image of Aug 10, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Phổ Yên · AQI 52 (Moderate)
Phổ Yên's tree count comes to 117,810 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Phổ Yên today: AQI 52, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 20:00 local time via Open-Meteo / CAMS, corrected with 9 ground-station cities within 145 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 9 station cities within 145 km, e.g. Phuc Yen and Vinh Phuc
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
12.4
PM10
23.1
NO₂
28.9
O₃
28.0
SO₂
14.1
CO
579.0
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Phổ Yên's daily AQI at 59 on average, from 31 on Nov 10 to an hourly peak of 135 on Nov 4.
Where Phổ Yên stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Phổ Yên: Healthy tree cover
37.5% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
117,810
Target trees
117,810
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Phổ Yên lost?
Since 2001, the area within 10 km of Phổ Yên has lost about 53 hectares of forest (about 74 football pitches): 30% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 10 hectares (18%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from December 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 53 haabout 74 football pitches
- Share of its forest
- 30%of what there was in 2000
- Cleared for good
- 10 hadeforestation: turned into farms, mines or towns
The worst year was 2022, when about 13 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 | under 1 ha | 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 | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 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 | 1 ha |
| 2010 | under 1 ha | under 1 ha | 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 | 3 ha | 3 ha |
| 2015 | under 1 ha | 5 ha | 5 ha |
| 2016 | under 1 ha | 9 ha | 9 ha |
| 2017 | under 1 ha | 1 ha | 1 ha |
| 2018 | under 1 ha | 1 ha | 2 ha |
| 2019 | 2 ha | 2 ha | 4 ha |
| 2020 | under 1 ha | under 1 ha | 1 ha |
| 2021 | under 1 ha | 2 ha | 3 ha |
| 2022 | under 1 ha | 12 ha | 13 ha |
| 2023 | under 1 ha | 1 ha | 2 ha |
| 2024 | 1 ha | 2 ha | 3 ha |
| 2025 | under 1 ha | 1 ha | 1 ha |
What is causing deforestation around Phổ Yên?
- Loggingcan grow back81% · 43 ha
- Towns and roadscleared for good15% · 8 ha
- Farms, pasture and plantationscleared for good3.2% · 2 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
- 9,730 ha
- Forest in 2020
- 9,870 ha
- Overall change
- +145 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Phổ Yên stayed about the same size, at about 9,870 hectares: new forest grew on about 380 hectares, and about 234 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 Phổ Yên
Same 2 km radius, same index — so they compare directly.
- Thái Nguyên19.9 km
Vietnam
- Tree cover
- 36%
- Air quality
- 52
- Phúc Yên27.9 km
Vietnam
- Tree cover
- 39%
- Air quality
- 119
- Vĩnh Yên32.0 km
Vietnam
- Tree cover
- 39%
- Air quality
- 112
- Bắc Ninh32.4 km
Vietnam
- Tree cover
- 32%
- Air quality
- 99
- Thị Trấn Đại Từ35.3 km
Vietnam
- Tree cover
- 62%
- Air quality
- 56
- Bắc Giang35.5 km
Vietnam
- Tree cover
- 27%
- Air quality
- 52
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Frequently asked
Questions about Phổ Yên
What is the air quality (AQI) in Phổ Yên right now?
The latest reading for Phổ Yên shows an AQI of 52 (Moderate), observed Nov 10, 20:00 local time via Open-Meteo / CAMS, corrected with 9 ground-station cities within 145 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Phổ Yên today?
At AQI 52 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Phổ Yên been like this week?
Over the last 7 days, the CAMS air-quality model put Phổ Yên's daily AQI at 59 on average, from 31 on Nov 10 to an hourly peak of 135 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Phổ Yên lost since 2001?
Since 2001, the area within 10 km of Phổ Yên has lost about 53 hectares of forest (about 74 football pitches): 30% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 10 hectares (18%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Phổ Yên stayed about the same size, at about 9,870 hectares: new forest grew on about 380 hectares, and about 234 hectares were lost.
What is the tree count in Phổ Yên?
Phổ Yên has an estimated 117,810 trees across the 12.57 km² measured — 37.5% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Phổ Yên need?
Phổ Yên has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Phổ Yên's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 Van Xuan; the tree count is an estimate derived from that cover.
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