City report · Xinjiang, China
Changji Air quality today
Air quality in Changji 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
- 28.5%
- trees in this area
- 89.4K
- more trees needed
- 20.4K
Measured across a 2 km radius around Changji, Changji Hui Autonomous Prefecture, Xinjiang, China (12.57 km²), from a satellite image of Sep 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Changji · AQI 132 (Unhealthy for sensitive groups)
Changji's tree count comes to 89,446 trees across 12.56 km² of land, 7 points below the 35% tree-cover level considered healthy for this area, so roughly 20,400 more trees would close the gap.
Air quality detail
Air quality in Changji today: AQI 132, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 23:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · New government center, Sanji (昌吉州新区政务中心), 3.6 km away
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
48.1
PM10
133.8
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project
- 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 Changji's daily AQI at 107 on average, from 90 on Nov 10 to an hourly peak of 154 on Nov 5.
Where Changji stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Changji: Below target
28.5% tree cover against a 35% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
89,446
Target trees
109,846
More trees needed
20,400
CO₂ if planted / yr
448.8 t
Deforestation · 2001–2025
How much forest has Changji lost?
There was very little forest around Changji in 2000, about 36 hectares, and about 1 hectare 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.
2018: satellite photo from September 2018 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 Changji?
- Farms, pasture and plantationscleared for good50% · under 1 ha
- Towns and roadscleared for good14% · under 1 ha
- Unknown causescause unknown21% · under 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
- 176 ha
- Forest in 2020
- 528 ha
- Overall change
- +352 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Changji grew from about 176 hectares to 528 hectares, a net gain of about 352 hectares (+200%). New forest grew on about 354 hectares, while 2 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 Changji
What is the air quality (AQI) in Changji right now?
The latest reading for Changji shows an AQI of 132 (Unhealthy for sensitive groups), measured Nov 11, 23:00 local time by the New government center, Sanji (昌吉州新区政务中心) ground monitoring station, 3.6 km away, via OpenAQ. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Changji 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 Changji been like this week?
Over the last 7 days, the CAMS air-quality model put Changji's daily AQI at 107 on average, from 90 on Nov 10 to an hourly peak of 154 on Nov 5. On 6 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Changji lost since 2001?
There was very little forest around Changji in 2000, about 36 hectares, and about 1 hectare 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 Changji grew from about 176 hectares to 528 hectares, a net gain of about 352 hectares (+200%). New forest grew on about 354 hectares, while 2 hectares were lost.
What is the tree count in Changji?
Changji has an estimated 89,446 trees across the 12.56 km² of land measured — 28.5% tree cover, 7 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Changji need?
Changji needs roughly 20,400 more trees to close a 7-point shortfall against its 35% tree-cover target — about 448.8 t of extra CO₂ absorbed per year once grown.
How are Changji's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Changji, 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 Changji; the tree count is an estimate derived from that cover.
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