City report · Jiangsu, China
Kunshan Air quality today
Air quality in Kunshan currently reads AQI 77 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 77
Moderate
- PM2.5, fine particles (µg/m³)
- 23.0
- tree cover
- 21.5%
- trees in this area
- 67.3K
- more trees needed
- 26.6K
Measured across a 2 km radius around Kunshan, Suzhou, Jiangsu, China (12.57 km²), from a satellite image of Sep 14, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kunshan · AQI 77 (Moderate)
Kunshan's tree count comes to 67,274 trees across 12.52 km² of land, 9 points below the 30% tree-cover level considered healthy for this area, so roughly 26,597 more trees would close the gap.
Air quality detail
Air quality in Kunshan today: AQI 77, 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 · Jiading Tianhua College, Shanghai (嘉定天华学院), 23.8 km away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
23.0
PM10
43.2
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Shanghai Environment Monitoring Center(上海市环境监测中心)
- 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 Kunshan's daily AQI at 88 on average, from 60 on Nov 9 to an hourly peak of 159 on Nov 6.
Where Kunshan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kunshan: Below target
21.5% tree cover against a 30% healthy-neighborhood target, across 12.52 km² of land.
Trees in this area
67,274
Target trees
93,871
More trees needed
26,597
CO₂ if planted / yr
585.1 t
Deforestation · 2001–2025
How much forest has Kunshan lost?
There was almost no forest around Kunshan in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
2019: satellite photo from August 2019 of a 5 × 5 km area in the city center.
Forest gained and lost, 2000–2020
- Forest in 2000
- 1,110 ha
- Forest in 2020
- 2,820 ha
- Overall change
- +1,700 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kunshan grew from about 1,110 hectares to 2,820 hectares, a net gain of about 1,700 hectares (+153%). New forest grew on about 1,700 hectares, while 1 hectare 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 Kunshan
What is the air quality (AQI) in Kunshan right now?
The latest reading for Kunshan shows an AQI of 77 (Moderate), measured Nov 11, 22:00 local time by the Jiading Tianhua College, Shanghai (嘉定天华学院) ground monitoring station, 23.8 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 Kunshan today?
At AQI 77 (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 Kunshan been like this week?
Over the last 7 days, the CAMS air-quality model put Kunshan's daily AQI at 88 on average, from 60 on Nov 9 to an hourly peak of 159 on Nov 6. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Kunshan lost since 2001?
There was almost no forest around Kunshan in 2000, so there has been almost nothing to lose 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 Kunshan grew from about 1,110 hectares to 2,820 hectares, a net gain of about 1,700 hectares (+153%). New forest grew on about 1,700 hectares, while 1 hectare were lost.
What is the tree count in Kunshan?
Kunshan has an estimated 67,274 trees across the 12.52 km² of land measured — 21.5% tree cover, 9 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Kunshan need?
Kunshan needs roughly 26,597 more trees to close a 9-point shortfall against its 30% tree-cover target — about 585.1 t of extra CO₂ absorbed per year once grown.
How are Kunshan's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Kunshan, 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 Kunshan; the tree count is an estimate derived from that cover.
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