City report · Chongqing, China
Changyuan Air quality today
Air quality in Changyuan currently reads AQI 117 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Air quality right now
AQI 117
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 42.0
- tree cover
- 37.6%
- trees in this area
- 118K
- more trees needed
- 0
Measured across a 2 km radius around Rongchang District, Chongqing, China (12.57 km²), from a satellite image of Sep 7, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Changyuan · AQI 117 (Unhealthy for sensitive groups)
Changyuan's tree count comes to 117,533 trees across 12.51 km² of land, already at or above the 35% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Changyuan today: AQI 117, Unhealthy for sensitive groups
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 · Tang Hong, Chongqing (重庆棠香), 1.7 km away
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
42.0
PM10
57.0
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
- 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 Changyuan's daily AQI at 98 on average, from 64 on Nov 9 to an hourly peak of 161 on Nov 5.
Where Changyuan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Changyuan: Healthy tree cover
37.6% tree cover against a 35% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
117,533
Target trees
117,533
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Changyuan lost?
Since 2001, the area within 10 km of Changyuan has lost about 121 hectares of forest (about 170 football pitches): 3.5% of the forest it had in 2000. Most of it (60%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km west of the city center.
- Forest lost since 2001
- 121 haabout 170 football pitches
- Share of its forest
- 3.5%of what there was in 2000
- Cleared for good
- 73 hadeforestation: turned into farms, mines or towns
The worst year was 2017, when about 46 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 | 3 ha | under 1 ha | 3 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 | 6 ha | 2 ha | 8 ha |
| 2014 | 3 ha | under 1 ha | 3 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 2 ha | 3 ha | 4 ha |
| 2017 | 30 ha | 16 ha | 46 ha |
| 2018 | 5 ha | 3 ha | 8 ha |
| 2019 | 1 ha | under 1 ha | 1 ha |
| 2020 | 3 ha | under 1 ha | 4 ha |
| 2021 | 2 ha | under 1 ha | 2 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 7 ha | 6 ha | 13 ha |
| 2024 | 4 ha | 5 ha | 10 ha |
| 2025 | 6 ha | 12 ha | 18 ha |
What is causing deforestation around Changyuan?
- Towns and roadscleared for good54% · 66 ha
- Loggingcan grow back33% · 40 ha
- Farms, pasture and plantationscleared for good5% · 6 ha
Also: mining and energy, 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
- 15,000 ha
- Forest in 2020
- 15,000 ha
- Overall change
- +10 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Changyuan stayed about the same size, at about 15,000 hectares: new forest grew on about 248 hectares, and about 237 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 Changyuan
What is the air quality (AQI) in Changyuan right now?
The latest reading for Changyuan shows an AQI of 117 (Unhealthy for sensitive groups), measured Nov 11, 22:00 local time by the Tang Hong, Chongqing (重庆棠香) ground monitoring station, 1.7 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 Changyuan today?
At AQI 117 (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 Changyuan been like this week?
Over the last 7 days, the CAMS air-quality model put Changyuan's daily AQI at 98 on average, from 64 on Nov 9 to an hourly peak of 161 on Nov 5. On 4 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Changyuan lost since 2001?
Since 2001, the area within 10 km of Changyuan has lost about 121 hectares of forest (about 170 football pitches): 3.5% of the forest it had in 2000. Most of it (60%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Changyuan stayed about the same size, at about 15,000 hectares: new forest grew on about 248 hectares, and about 237 hectares were lost.
What is the tree count in Changyuan?
Changyuan has an estimated 117,533 trees across the 12.51 km² of land measured — 37.6% tree cover, already past the 35% tree-cover target set for this area.
How many more trees does Changyuan need?
Changyuan has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Changyuan's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Rongchang 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 Rongchang District; the tree count is an estimate derived from that cover.
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