City report · Chongqing, China
Bachuan Air quality today
Air quality in Bachuan currently reads AQI 152 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
AQI 152
Air quality right now
Unhealthy
- PM2.5, fine particles (µg/m³)
- 57.4
- tree cover
- 37.0%
- trees in this area
- 114K
- more trees needed
- 9.2K
Measured across a 2 km radius around Tongliang District, Chongqing, China (12.57 km²), from a satellite image of Sep 4, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Bachuan · AQI 152 (Unhealthy)
Bachuan's tree count comes to 114,030 trees across 12.33 km² of land, 3 points below the 40% tree-cover level considered healthy for this area, so roughly 9,246 more trees would close the gap.
Air quality detail
Air quality in Bachuan today: AQI 152, Unhealthy
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 · Longmen Street, Chongqing (重庆龙门街), 1.9 km away
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
57.4
PM10
95.4
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 Bachuan's daily AQI at 106 on average, from 65 on Nov 8 to an hourly peak of 169 on Nov 7.
Where Bachuan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Bachuan: Below target
37.0% tree cover against a 40% healthy-neighborhood target, across 12.33 km² of land.
Trees in this area
114,030
Target trees
123,276
More trees needed
9,246
CO₂ if planted / yr
203.4 t
Deforestation · 2001–2025
How much forest has Bachuan lost?
Since 2001, the area within 10 km of Bachuan has lost about 106 hectares of forest (about 150 football pitches): 1.8% of the forest it had in 2000. Most of it (64%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km south of the city center.
- Forest lost since 2001
- 106 haabout 150 football pitches
- Share of its forest
- 1.8%of what there was in 2000
- Cleared for good
- 68 hadeforestation: turned into farms, mines or towns
The worst year was 2004, when about 24 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 | 1 ha | under 1 ha | 1 ha |
| 2003 | 2 ha | 2 ha | 4 ha |
| 2004 | 15 ha | 9 ha | 24 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 2 ha | 2 ha | 5 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | 2 ha | under 1 ha | 3 ha |
| 2010 | under 1 ha | 1 ha | 2 ha |
| 2011 | 1 ha | under 1 ha | 2 ha |
| 2012 | 2 ha | 4 ha | 6 ha |
| 2013 | 3 ha | 1 ha | 4 ha |
| 2014 | 2 ha | under 1 ha | 2 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | 2 ha | under 1 ha | 3 ha |
| 2018 | 1 ha | under 1 ha | 2 ha |
| 2019 | 1 ha | under 1 ha | 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | 9 ha | under 1 ha | 10 ha |
| 2022 | 6 ha | under 1 ha | 7 ha |
| 2023 | 6 ha | under 1 ha | 7 ha |
| 2024 | 4 ha | under 1 ha | 5 ha |
| 2025 | 4 ha | 16 ha | 20 ha |
What is causing deforestation around Bachuan?
- Towns and roadscleared for good45% · 48 ha
- Farms, pasture and plantationscleared for good16% · 17 ha
- Mining and energycleared for good3% · 3 ha
Also: logging, 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
- 17,500 ha
- Forest in 2020
- 17,500 ha
- Overall change
- −61 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Bachuan stayed about the same size, at about 17,500 hectares: new forest grew on about 137 hectares, and about 198 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 Bachuan
What is the air quality (AQI) in Bachuan right now?
The latest reading for Bachuan shows an AQI of 152 (Unhealthy), measured Nov 11, 23:00 local time by the Longmen Street, Chongqing (重庆龙门街) ground monitoring station, 1.9 km away, via OpenAQ. The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Bachuan today?
At AQI 152 (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 Bachuan been like this week?
Over the last 7 days, the CAMS air-quality model put Bachuan's daily AQI at 106 on average, from 65 on Nov 8 to an hourly peak of 169 on Nov 7. On 4 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Bachuan lost since 2001?
Since 2001, the area within 10 km of Bachuan has lost about 106 hectares of forest (about 150 football pitches): 1.8% of the forest it had in 2000. Most of it (64%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Bachuan stayed about the same size, at about 17,500 hectares: new forest grew on about 137 hectares, and about 198 hectares were lost.
What is the tree count in Bachuan?
Bachuan has an estimated 114,030 trees across the 12.33 km² of land measured — 37.0% tree cover, 3 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Bachuan need?
Bachuan needs roughly 9,246 more trees to close a 3-point shortfall against its 40% tree-cover target — about 203.4 t of extra CO₂ absorbed per year once grown.
How are Bachuan's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Tongliang 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 Tongliang District; the tree count is an estimate derived from that cover.
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