City report · Anhui, China
Hefei Air quality today
Air quality in Hefei currently reads AQI 87 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 87
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 28.3
- tree cover
- 24.8%
- trees in this area
- 76.4K
- more trees needed
- 16.0K
Measured across a 2 km radius around Luyang District, Hefei, Anhui, China (12.57 km²), from a satellite image of Aug 3, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hefei · AQI 87 (Moderate)
Hefei's tree count comes to 76,353 trees across 12.32 km² of land, 5 points below the 30% tree-cover level considered healthy for this area, so roughly 16,010 more trees would close the gap.
Air quality detail
Air quality in Hefei today: AQI 87, Moderate
Main pollutant: PM2.5 · Observed Nov 12, 00:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Hupo Compound, Hefei (合肥琥珀山庄), 2.2 km away · median of 5 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
28.3
PM10
50.8
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Anhui Environmental Protection Agency (安徽省生态环境厅)
- 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 Hefei's daily AQI at 105 on average, from 64 on Nov 9 to an hourly peak of 213 on Nov 6.
Where Hefei stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hefei: Below target
24.8% tree cover against a 30% healthy-neighborhood target, across 12.32 km² of land.
Trees in this area
76,353
Target trees
92,363
More trees needed
16,010
CO₂ if planted / yr
352.2 t
Deforestation · 2001–2025
How much forest has Hefei lost?
There was very little forest around Hefei in 2000, about 39 hectares, and about 2 hectares 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.
2017: satellite photo from June 2017 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 Hefei?
- Towns and roadscleared for good19% · under 1 ha
- Unknown causescause unknown81% · 2 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
- 1,280 ha
- Forest in 2020
- 2,190 ha
- Overall change
- +912 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hefei grew from about 1,280 hectares to 2,190 hectares, a net gain of about 912 hectares (+71%). New forest grew on about 914 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 Hefei
What is the air quality (AQI) in Hefei right now?
The latest reading for Hefei shows an AQI of 87 (Moderate), measured Nov 12, 00:00 local time by 5 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Hupo Compound, Hefei (合肥琥珀山庄), 2.2 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Hefei today?
At AQI 87 (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 Hefei been like this week?
Over the last 7 days, the CAMS air-quality model put Hefei's daily AQI at 105 on average, from 64 on Nov 9 to an hourly peak of 213 on Nov 6. On 5 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Hefei lost since 2001?
There was very little forest around Hefei in 2000, about 39 hectares, and about 2 hectares 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 Hefei grew from about 1,280 hectares to 2,190 hectares, a net gain of about 912 hectares (+71%). New forest grew on about 914 hectares, while 2 hectares were lost.
What is the tree count in Hefei?
Hefei has an estimated 76,353 trees across the 12.32 km² of land measured — 24.8% tree cover, 5 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Hefei need?
Hefei needs roughly 16,010 more trees to close a 5-point shortfall against its 30% tree-cover target — about 352.2 t of extra CO₂ absorbed per year once grown.
How are Hefei's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Luyang 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 Luyang District; the tree count is an estimate derived from that cover.
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