City report · Beijing, China
Mentougou Air quality today
Air quality in Mentougou currently reads AQI 132 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 132
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 48.1
- tree cover
- 30.9%
- trees in this area
- 96.3K
- more trees needed
- 12.8K
Measured across a 2 km radius around Mentougou District, Beijing, China (12.57 km²), from a satellite image of Sep 23, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Mentougou · AQI 132 (Unhealthy for sensitive groups)
Mentougou's tree count comes to 96,299 trees across 12.47 km² of land, 4 points below the 35% tree-cover level considered healthy for this area, so roughly 12,777 more trees would close the gap.
Air quality detail
Air quality in Mentougou today: AQI 132, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 12, 00:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Mentougou, Longquan Town, Beijing (门头沟龙泉镇), 1.1 km away · median of 2 stations
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
48.1
PM10
80.2
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Beijing Environmental Protection Monitoring Center (北京市环境保护监测中心)
- 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 Mentougou's daily AQI at 126 on average, from 108 on Nov 8 to an hourly peak of 217 on Nov 5.
Where Mentougou stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Mentougou: Below target
30.9% tree cover against a 35% healthy-neighborhood target, across 12.47 km² of land.
Trees in this area
96,299
Target trees
109,076
More trees needed
12,777
CO₂ if planted / yr
281.1 t
Deforestation · 2001–2025
How much forest has Mentougou lost?
Since 2001, the area within 10 km of Mentougou has lost about 14 hectares of forest (about 20 football pitches): under 1% of the forest it had in 2000. Most of it (69%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 14 haabout 20 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 10 hadeforestation: turned into farms, mines or towns
The worst year was 2014, when about 3 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 | 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 | under 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 | 1 ha | under 1 ha | 2 ha |
| 2010 | 2 ha | under 1 ha | 2 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 | 3 ha | under 1 ha | 3 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 | 1 ha | under 1 ha | 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 Mentougou?
- Towns and roadscleared for good56% · 8 ha
- Mining and energycleared for good12% · 2 ha
- Unknown causescause unknown31% · 5 ha
Also: farms, pasture and plantations.
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
- 11,600 ha
- Forest in 2020
- 11,700 ha
- Overall change
- +110 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Mentougou stayed about the same size, at about 11,700 hectares: new forest grew on about 219 hectares, and about 109 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 Mentougou
Same 2 km radius, same index — so they compare directly.
Build your own
Compare Mentougou with anywhere
This place
Mentougou
Use this data
Put Mentougou's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Mentougou
What is the air quality (AQI) in Mentougou right now?
The latest reading for Mentougou shows an AQI of 132 (Unhealthy for sensitive groups), measured Nov 12, 00:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Mentougou, Longquan Town, Beijing (门头沟龙泉镇), 1.1 km away). The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Mentougou today?
At AQI 132 (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 Mentougou been like this week?
Over the last 7 days, the CAMS air-quality model put Mentougou's daily AQI at 126 on average, from 108 on Nov 8 to an hourly peak of 217 on Nov 5. On 7 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Mentougou lost since 2001?
Since 2001, the area within 10 km of Mentougou has lost about 14 hectares of forest (about 20 football pitches): under 1% of the forest it had in 2000. Most of it (69%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Mentougou stayed about the same size, at about 11,700 hectares: new forest grew on about 219 hectares, and about 109 hectares were lost.
What is the tree count in Mentougou?
Mentougou has an estimated 96,299 trees across the 12.47 km² of land measured — 30.9% tree cover, 4 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Mentougou need?
Mentougou needs roughly 12,777 more trees to close a 4-point shortfall against its 35% tree-cover target — about 281.1 t of extra CO₂ absorbed per year once grown.
How are Mentougou's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Mentougou District, 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 Mentougou District; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address