City report · Lao Cai, Vietnam
Yên Bái Air quality today
Air quality in Yên Bái currently reads AQI 65 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 65
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 17.7
- tree cover
- 65.8%
- trees in this area
- 207K
- more trees needed
- 0
Measured across a 2 km radius around Yen Bai, Lao Cai, Vietnam (12.57 km²), from a satellite image of Sep 4, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Yên Bái · AQI 65 (Moderate)
Yên Bái's tree count comes to 206,717 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 Yên Bái today: AQI 65, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 22:00 local time via Open-Meteo / CAMS, corrected with 8 ground-station cities within 245 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 8 station cities within 245 km, e.g. Vinh Phuc and Phuc Yen
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
17.7
PM10
21.2
NO₂
21.1
O₃
25.0
SO₂
9.4
CO
595.0
- 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 Yên Bái's daily AQI at 69 on average, from 38 on Nov 9 to an hourly peak of 152 on Nov 5.
Where Yên Bái stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Yên Bái: Healthy tree cover
65.8% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
206,717
Target trees
206,717
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Yên Bái lost?
Since 2001, the area within 10 km of Yên Bái has lost about 6,710 hectares of forest (about 9,400 football pitches): 52% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 2,120 hectares (32%) 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 southwest of the city center.
- Forest lost since 2001
- 6,710 haabout 9,400 football pitches
- Share of its forest
- 52%of what there was in 2000
- Cleared for good
- 2,120 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 372 hectares a year in 2021–2025, down from 614 hectares a year in 2016–2020. The worst year was 2018, when about 808 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 | 12 ha | 38 ha | 50 ha |
| 2002 | 12 ha | 9 ha | 21 ha |
| 2003 | 16 ha | 31 ha | 47 ha |
| 2004 | 36 ha | 47 ha | 84 ha |
| 2005 | 26 ha | 39 ha | 65 ha |
| 2006 | 9 ha | 20 ha | 29 ha |
| 2007 | 20 ha | 44 ha | 64 ha |
| 2008 | 29 ha | 36 ha | 65 ha |
| 2009 | 21 ha | 41 ha | 62 ha |
| 2010 | 48 ha | 68 ha | 116 ha |
| 2011 | 38 ha | 69 ha | 107 ha |
| 2012 | 18 ha | 39 ha | 57 ha |
| 2013 | 97 ha | 189 ha | 286 ha |
| 2014 | 107 ha | 290 ha | 397 ha |
| 2015 | 114 ha | 218 ha | 332 ha |
| 2016 | 181 ha | 366 ha | 547 ha |
| 2017 | 178 ha | 337 ha | 515 ha |
| 2018 | 245 ha | 563 ha | 808 ha |
| 2019 | 228 ha | 463 ha | 691 ha |
| 2020 | 116 ha | 391 ha | 507 ha |
| 2021 | 184 ha | 426 ha | 610 ha |
| 2022 | 123 ha | 300 ha | 423 ha |
| 2023 | 112 ha | 235 ha | 347 ha |
| 2024 | 86 ha | 174 ha | 260 ha |
| 2025 | 62 ha | 160 ha | 222 ha |
What is causing deforestation around Yên Bái?
- Loggingcan grow back66% · 4,450 ha
- Farms, pasture and plantationscleared for good18% · 1,220 ha
- Towns and roadscleared for good12% · 798 ha
Also: shifting farming, mining and energy, storms, floods and other natural causes, 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
- 22,000 ha
- Forest in 2020
- 19,800 ha
- Overall change
- −2,200 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Yên Bái shrank from about 22,000 hectares to 19,800 hectares, a net loss of about 2,200 hectares (−10%). New forest grew on about 355 hectares, but 2,550 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 Yên Bái
Same 2 km radius, same index — so they compare directly.
- Tuyên Quang33.2 km
Vietnam
- Tree cover
- 56%
- Air quality
- 38
- Việt Trì67.5 km
Vietnam
- Tree cover
- 40%
- Air quality
- 108
- Thị Trấn Đại Từ75.7 km
Vietnam
- Tree cover
- 62%
- Air quality
- 61
- Bắc Quang84.7 km
Vietnam
- Tree cover
- 83%
- Air quality
- 36
- Vĩnh Yên85.2 km
Vietnam
- Tree cover
- 39%
- Air quality
- 108
- Ba Vì86.3 km
Vietnam
- Tree cover
- 96%
- Air quality
- 36
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Frequently asked
Questions about Yên Bái
What is the air quality (AQI) in Yên Bái right now?
The latest reading for Yên Bái shows an AQI of 65 (Moderate), observed Nov 10, 22:00 local time via Open-Meteo / CAMS, corrected with 8 ground-station cities within 245 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 Yên Bái today?
At AQI 65 (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 Yên Bái been like this week?
Over the last 7 days, the CAMS air-quality model put Yên Bái's daily AQI at 69 on average, from 38 on Nov 9 to an hourly peak of 152 on Nov 5. On 2 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Yên Bái lost since 2001?
Since 2001, the area within 10 km of Yên Bái has lost about 6,710 hectares of forest (about 9,400 football pitches): 52% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 2,120 hectares (32%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 372 hectares a year in 2021–2025, down from 614 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Yên Bái shrank from about 22,000 hectares to 19,800 hectares, a net loss of about 2,200 hectares (−10%). New forest grew on about 355 hectares, but 2,550 hectares were lost.
What is the tree count in Yên Bái?
Yên Bái has an estimated 206,717 trees across the 12.57 km² measured — 65.8% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Yên Bái need?
Yên Bái has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Yên Bái'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 Yen Bai; the tree count is an estimate derived from that cover.
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