City report · Hebei, China
Zhangjiakou Air quality today
Air quality in Zhangjiakou currently reads AQI 77 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 77
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 22.8
- tree cover
- 13.3%
- trees in this area
- 41.3K
- more trees needed
- 51.8K
Measured across a 2 km radius around Qiaoxi District, Zhangjiakou, Zhangjiakou, Hebei, China (12.57 km²), from a satellite image of Sep 13, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Zhangjiakou · AQI 77 (Moderate)
Zhangjiakou's tree count comes to 41,282 trees across 12.42 km² of land, 17 points below the 30% tree-cover level considered healthy for this area, so roughly 51,835 more trees would close the gap.
Air quality detail
Air quality in Zhangjiakou today: AQI 77, Moderate
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 · Century Compound, Zhangjiakou (张家口市世纪豪园), 3.1 km away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
22.8
PM10
34.0
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Hebei Province Environment Protection Agency (河北省空气质量自动发布系统)
- 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 Zhangjiakou's daily AQI at 80 on average, from 66 on Nov 6 to an hourly peak of 159 on Nov 5.
Where Zhangjiakou stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Zhangjiakou: Critically low
13.3% tree cover against a 30% healthy-neighborhood target, across 12.42 km² of land.
Trees in this area
41,282
Target trees
93,117
More trees needed
51,835
CO₂ if planted / yr
1,140 t
Deforestation · 2001–2025
How much forest has Zhangjiakou lost?
There was very little forest around Zhangjiakou in 2000, about 30 hectares, and about 2 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 September 2017 of a 5 × 5 km area in the city center.
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 | 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 | 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 Zhangjiakou?
- Towns and roadscleared for good31% · under 1 ha
- Unknown causescause unknown69% · 1 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
- 789 ha
- Forest in 2020
- 898 ha
- Overall change
- +109 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Zhangjiakou grew from about 789 hectares to 898 hectares, a net gain of about 109 hectares (+14%). New forest grew on about 124 hectares, while 15 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
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Frequently asked
Questions about Zhangjiakou
What is the air quality (AQI) in Zhangjiakou right now?
The latest reading for Zhangjiakou shows an AQI of 77 (Moderate), measured Nov 12, 00:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Century Compound, Zhangjiakou (张家口市世纪豪园), 3.1 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Zhangjiakou today?
At AQI 77 (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 Zhangjiakou been like this week?
Over the last 7 days, the CAMS air-quality model put Zhangjiakou's daily AQI at 80 on average, from 66 on Nov 6 to an hourly peak of 159 on Nov 5. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Zhangjiakou lost since 2001?
There was very little forest around Zhangjiakou in 2000, about 30 hectares, and about 2 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 Zhangjiakou grew from about 789 hectares to 898 hectares, a net gain of about 109 hectares (+14%). New forest grew on about 124 hectares, while 15 hectares were lost.
What is the tree count in Zhangjiakou?
Zhangjiakou has an estimated 41,282 trees across the 12.42 km² of land measured — 13.3% tree cover, 17 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Zhangjiakou need?
Zhangjiakou needs roughly 51,835 more trees to close a 17-point shortfall against its 30% tree-cover target — about 1,140 t of extra CO₂ absorbed per year once grown.
How are Zhangjiakou's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Qiaoxi 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 Qiaoxi District; the tree count is an estimate derived from that cover.
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