City report · Jiangsu, China
Suzhou Air quality today
Air quality in Suzhou currently reads AQI 84 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 84
Moderate
- PM2.5, fine particles (µg/m³)
- 26.8
- tree cover
- 20.9%
- trees in this area
- 65.5K
- more trees needed
- 28.5K
Measured across a 2 km radius around Gusu District, Suzhou, Jiangsu, China (12.57 km²), from a satellite image of Jul 31, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Suzhou · AQI 84 (Moderate)
Suzhou's tree count comes to 65,462 trees across 12.53 km² of land, 9 points below the 30% tree-cover level considered healthy for this area, so roughly 28,503 more trees would close the gap.
Air quality detail
Air quality in Suzhou today: AQI 84, Moderate
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 · Zhágāng chǎng, Suzhou (苏州轧钢厂), 300 m away · median of 5 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
26.8
PM10
50.8
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Jiangsu Environmental Protection public network (江苏省城市空气PM2.5等试运行监测数据平台), Jiangsu Province PM2.5 Air Monitoring Comission (江苏省城市空气PM2.5等试运行监测数据平台)
- 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 Suzhou's daily AQI at 101 on average, from 58 on Nov 9 to an hourly peak of 164 on Nov 11.
Where Suzhou stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Suzhou: Below target
20.9% tree cover against a 30% healthy-neighborhood target, across 12.53 km² of land.
Trees in this area
65,462
Target trees
93,965
More trees needed
28,503
CO₂ if planted / yr
627.1 t
Deforestation · 2001–2025
How much forest has Suzhou lost?
Since 2001, the area within 10 km of Suzhou has lost about 13 hectares of forest (about 19 football pitches): 2.4% of the forest it had in 2000. Most of it (77%) 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 19 football pitches
- Share of its forest
- 2.4%of what there was in 2000
- Cleared for good
- 10 hadeforestation: turned into farms, mines or towns
The worst year was 2008, 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 | 3 ha | under 1 ha | 3 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 | 5 ha | under 1 ha | 5 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 | 1 ha | 2 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 Suzhou?
- Towns and roadscleared for good74% · 10 ha
- Loggingcan grow back11% · 2 ha
- Farms, pasture and plantationscleared for good3% · 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
- 1,860 ha
- Forest in 2020
- 3,160 ha
- Overall change
- +1,290 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Suzhou grew from about 1,860 hectares to 3,160 hectares, a net gain of about 1,290 hectares (+70%). New forest grew on about 1,300 hectares, while 9 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 Suzhou
What is the air quality (AQI) in Suzhou right now?
The latest reading for Suzhou shows an AQI of 84 (Moderate), measured Nov 11, 22:00 local time by 5 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Zhágāng chǎng, Suzhou (苏州轧钢厂), 300 m away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Suzhou today?
At AQI 84 (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 Suzhou been like this week?
Over the last 7 days, the CAMS air-quality model put Suzhou's daily AQI at 101 on average, from 58 on Nov 9 to an hourly peak of 164 on Nov 11. On 2 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Suzhou lost since 2001?
Since 2001, the area within 10 km of Suzhou has lost about 13 hectares of forest (about 19 football pitches): 2.4% of the forest it had in 2000. Most of it (77%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Suzhou grew from about 1,860 hectares to 3,160 hectares, a net gain of about 1,290 hectares (+70%). New forest grew on about 1,300 hectares, while 9 hectares were lost.
What is the tree count in Suzhou?
Suzhou has an estimated 65,462 trees across the 12.53 km² of land measured — 20.9% tree cover, 9 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Suzhou need?
Suzhou needs roughly 28,503 more trees to close a 9-point shortfall against its 30% tree-cover target — about 627.1 t of extra CO₂ absorbed per year once grown.
How are Suzhou's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Gusu 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 Gusu District; the tree count is an estimate derived from that cover.
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