City report · Gansu, China
Zhangye Air quality today
Air quality in Zhangye currently reads AQI 54 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 54
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 11.7
- tree cover
- 11.0%
- trees in this area
- 34.5K
- more trees needed
- 59.6K
Measured across a 2 km radius around Ganzhou District, Zhangye, Gansu, China (12.57 km²), from a satellite image of Sep 21, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Zhangye · AQI 54 (Moderate)
Zhangye's tree count comes to 34,523 trees across 12.56 km² of land, 19 points below the 30% tree-cover level considered healthy for this area, so roughly 59,631 more trees would close the gap.
Air quality detail
Air quality in Zhangye today: AQI 54, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 16:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 225 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 3 station cities within 225 km, e.g. Jiuquan and Jiayuguan City
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
11.7
PM10
14.9
NO₂
8.4
O₃
79.0
SO₂
4.3
CO
204.0
- 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 Zhangye's daily AQI at 63 on average, from 53 on Nov 10 to an hourly peak of 113 on Nov 5.
Where Zhangye stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Zhangye: Critically low
11.0% tree cover against a 30% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
34,523
Target trees
94,154
More trees needed
59,631
CO₂ if planted / yr
1,312 t
Deforestation · 2001–2025
How much forest has Zhangye lost?
There was very little forest around Zhangye in 2000, about 27 hectares, and about 20 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 June 2017 of a 5 × 5 km area in the city center.
The worst year was 2002, when about 6 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 | 1 ha | under 1 ha | 2 ha |
| 2002 | 6 ha | under 1 ha | 6 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 2 ha | under 1 ha | 2 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 4 ha | under 1 ha | 5 ha |
| 2007 | 1 ha | under 1 ha | 1 ha |
| 2008 | 2 ha | under 1 ha | 2 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | 1 ha | under 1 ha | 2 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 Zhangye?
- Farms, pasture and plantationscleared for good96% · 19 ha
- Unknown causescause unknown4% · under 1 ha
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
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. Images: contains modified Copernicus Sentinel data. How it's measured
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Frequently asked
Questions about Zhangye
What is the air quality (AQI) in Zhangye right now?
The latest reading for Zhangye shows an AQI of 54 (Moderate), observed Nov 11, 16:00 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 225 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 Zhangye today?
At AQI 54 (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 Zhangye been like this week?
Over the last 7 days, the CAMS air-quality model put Zhangye's daily AQI at 63 on average, from 53 on Nov 10 to an hourly peak of 113 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Zhangye lost since 2001?
There was very little forest around Zhangye in 2000, about 27 hectares, and about 20 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.
What is the tree count in Zhangye?
Zhangye has an estimated 34,523 trees across the 12.56 km² of land measured — 11.0% tree cover, 19 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Zhangye need?
Zhangye needs roughly 59,631 more trees to close a 19-point shortfall against its 30% tree-cover target — about 1,312 t of extra CO₂ absorbed per year once grown.
How are Zhangye'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 Ganzhou District; the tree count is an estimate derived from that cover.
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