City report · Chongqing, China
Hanjia Air quality today
Air quality in Hanjia currently reads AQI 64 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 64
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 15.9
- tree cover
- 64.6%
- trees in this area
- 189K
- more trees needed
- 0
Measured across a 2 km radius around Pengshui Miao and Tujia Autonomous County, Chongqing, China (12.57 km²), from a satellite image of Aug 10, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hanjia · AQI 64 (Moderate)
Hanjia's tree count comes to 188,944 trees across 11.7 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Hanjia today: AQI 64, Moderate
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 · hé bǎo jiē, Chongqing (重庆河堡街), 1.1 km away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
15.9
PM10
32.4
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
- 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 Hanjia's daily AQI at 57 on average, from 25 on Nov 8 to an hourly peak of 101 on Nov 7.
Where Hanjia stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hanjia: Healthy tree cover
64.6% tree cover against a 30% healthy-neighborhood target, across 11.7 km² of land.
Trees in this area
188,944
Target trees
188,944
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Hanjia lost?
Since 2001, the area within 10 km of Hanjia has lost about 112 hectares of forest (about 160 football pitches): under 1% of the forest it had in 2000. Most of it (78%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from October 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 112 haabout 160 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 87 hadeforestation: turned into farms, mines or towns
The worst year was 2016, 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 | under 1 ha | 4 ha | 4 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 3 ha | under 1 ha | 3 ha |
| 2005 | under 1 ha | 1 ha | 2 ha |
| 2006 | under 1 ha | 1 ha | 2 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | 2 ha | under 1 ha | 3 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | 4 ha | under 1 ha | 4 ha |
| 2011 | 9 ha | under 1 ha | 10 ha |
| 2012 | 4 ha | 1 ha | 5 ha |
| 2013 | 3 ha | under 1 ha | 3 ha |
| 2014 | 4 ha | 2 ha | 5 ha |
| 2015 | under 1 ha | 1 ha | 2 ha |
| 2016 | 17 ha | 7 ha | 24 ha |
| 2017 | 4 ha | under 1 ha | 5 ha |
| 2018 | 3 ha | under 1 ha | 3 ha |
| 2019 | 4 ha | under 1 ha | 5 ha |
| 2020 | 3 ha | under 1 ha | 3 ha |
| 2021 | 8 ha | under 1 ha | 9 ha |
| 2022 | 6 ha | under 1 ha | 6 ha |
| 2023 | 2 ha | 3 ha | 5 ha |
| 2024 | 5 ha | under 1 ha | 5 ha |
| 2025 | 2 ha | under 1 ha | 2 ha |
What is causing deforestation around Hanjia?
- Towns and roadscleared for good64% · 71 ha
- Loggingcan grow back12% · 14 ha
- Farms, pasture and plantationscleared for good10% · 12 ha
Also: mining and energy, storms, floods and other natural causes, 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
- 25,200 ha
- Forest in 2020
- 25,100 ha
- Overall change
- −137 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hanjia stayed about the same size, at about 25,100 hectares: new forest grew on about 96 hectares, and about 233 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
In the same region
Measured cities near Hanjia
Same 2 km radius, same index — so they compare directly.
- Qianjiang, Chongqing65.0 km
China
- Tree cover
- 52%
- Air quality
- 33
- Sanhe, Chongqing76.2 km
China
- Tree cover
- 33%
- Air quality
- 87
- Nanbin78.5 km
China
- Tree cover
- 58%
- Air quality
- 75
- Fuling87.4 km
China
- Tree cover
- 40%
- Air quality
- 112
- Nanchuan103.9 km
China
- Tree cover
- 41%
- Air quality
- 79
- Fengcheng, Chongqing121.8 km
China
- Tree cover
- 43%
- Air quality
- 114
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Frequently asked
Questions about Hanjia
What is the air quality (AQI) in Hanjia right now?
The latest reading for Hanjia shows an AQI of 64 (Moderate), measured Nov 11, 23:00 local time by the hé bǎo jiē, Chongqing (重庆河堡街) ground monitoring station, 1.1 km away, via OpenAQ. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Hanjia today?
At AQI 64 (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 Hanjia been like this week?
Over the last 7 days, the CAMS air-quality model put Hanjia's daily AQI at 57 on average, from 25 on Nov 8 to an hourly peak of 101 on Nov 7. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Hanjia lost since 2001?
Since 2001, the area within 10 km of Hanjia has lost about 112 hectares of forest (about 160 football pitches): under 1% of the forest it had in 2000. Most of it (78%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Hanjia stayed about the same size, at about 25,100 hectares: new forest grew on about 96 hectares, and about 233 hectares were lost.
What is the tree count in Hanjia?
Hanjia has an estimated 188,944 trees across the 11.7 km² of land measured — 64.6% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Hanjia need?
Hanjia has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Hanjia's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Pengshui Miao and Tujia Autonomous County, 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 Pengshui Miao and Tujia Autonomous County; the tree count is an estimate derived from that cover.
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