City report · Chongqing, China
Wanzhou Air quality today
Air quality in Wanzhou currently reads AQI 153 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 153
Unhealthy
- PM2.5, fine particles (µg/m³)
- 58.7
- tree cover
- 35.6%
- trees in this area
- 104K
- more trees needed
- 12.9K
Measured across a 2 km radius around Wanzhou District, Chongqing, China (12.57 km²), from a satellite image of Sep 9, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Wanzhou · AQI 153 (Unhealthy)
Wanzhou's tree count comes to 104,347 trees across 11.73 km² of land, 4 points below the 40% tree-cover level considered healthy for this area, so roughly 12,897 more trees would close the gap.
Air quality detail
Air quality in Wanzhou today: AQI 153, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 22:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Baian dam, Chongqing (重庆百安坝), 3.6 km away · median of 2 stations
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
58.7
PM10
77.2
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Chongqing Environmental Protection Bureau (重庆市主城区空气质量)
- Outdoor exercise
- Everyone should cut down long or hard exercise; sensitive groups should avoid it
- Windows
- Keep them closed
- Mask
- Wear an N95 outdoors
- Air purifier
- Run one
Over the last 7 days, the CAMS air-quality model put Wanzhou's daily AQI at 106 on average, from 71 on Nov 9 to an hourly peak of 173 on Nov 5.
Where Wanzhou stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Wanzhou: Below target
35.6% tree cover against a 40% healthy-neighborhood target, across 11.73 km² of land.
Trees in this area
104,347
Target trees
117,244
More trees needed
12,897
CO₂ if planted / yr
283.7 t
Deforestation · 2001–2025
How much forest has Wanzhou lost?
Since 2001, the area within 10 km of Wanzhou has lost about 13 hectares of forest (about 18 football pitches): under 1% of the forest it had in 2000. Most of it (81%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 13 haabout 18 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 11 hadeforestation: turned into farms, mines or towns
The worst year was 2021, when about 5 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 | 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 | 1 ha | under 1 ha | 1 ha |
| 2019 | 2 ha | under 1 ha | 2 ha |
| 2020 | 1 ha | under 1 ha | 1 ha |
| 2021 | 3 ha | 2 ha | 5 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | 2 ha | under 1 ha | 2 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Wanzhou?
- Towns and roadscleared for good77% · 10 ha
- Loggingcan grow back11% · 1 ha
- Mining and energycleared for good2.3% · under 1 ha
Also: 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
- 15,400 ha
- Forest in 2020
- 15,700 ha
- Overall change
- +263 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Wanzhou stayed about the same size, at about 15,700 hectares: new forest grew on about 525 hectares, and about 262 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 Wanzhou
What is the air quality (AQI) in Wanzhou right now?
The latest reading for Wanzhou shows an AQI of 153 (Unhealthy), measured Nov 11, 22:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Baian dam, Chongqing (重庆百安坝), 3.6 km away). The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Wanzhou today?
At AQI 153 (Unhealthy): everyone should cut down long or hard exercise; sensitive groups should avoid it. Windows: keep them closed. Masks: wear an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Wanzhou been like this week?
Over the last 7 days, the CAMS air-quality model put Wanzhou's daily AQI at 106 on average, from 71 on Nov 9 to an hourly peak of 173 on Nov 5. On 5 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Wanzhou lost since 2001?
Since 2001, the area within 10 km of Wanzhou has lost about 13 hectares of forest (about 18 football pitches): under 1% of the forest it had in 2000. Most of it (81%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Wanzhou stayed about the same size, at about 15,700 hectares: new forest grew on about 525 hectares, and about 262 hectares were lost.
What is the tree count in Wanzhou?
Wanzhou has an estimated 104,347 trees across the 11.73 km² of land measured — 35.6% tree cover, 4 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Wanzhou need?
Wanzhou needs roughly 12,897 more trees to close a 4-point shortfall against its 40% tree-cover target — about 283.7 t of extra CO₂ absorbed per year once grown.
How are Wanzhou's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Wanzhou 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 Wanzhou District; the tree count is an estimate derived from that cover.
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