City report · China
Chongming Air quality today
Air quality in Chongming currently reads AQI 71 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 71
Moderate
- PM2.5, fine particles (µg/m³)
- 20.1
- tree cover
- 29.4%
- trees in this area
- 90.7K
- more trees needed
- 1.9K
Measured across a 2 km radius around Chongming District, Shanghai, China (12.57 km²), from a satellite image of Sep 6, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Chongming · AQI 71 (Moderate)
Chongming's tree count comes to 90,700 trees across 12.34 km² of land, 1 points below the 30% tree-cover level considered healthy for this area, so roughly 1,851 more trees would close the gap.
Air quality detail
Air quality in Chongming today: AQI 71, 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 · Chongming Forest Park, Shanghai (崇明森林公园), 21.4 km away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
20.1
PM10
23.2
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 Chongming's daily AQI at 95 on average, from 52 on Nov 9 to an hourly peak of 173 on Nov 11.
Where Chongming stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Chongming: Below target
29.4% tree cover against a 30% healthy-neighborhood target, across 12.34 km² of land.
Trees in this area
90,700
Target trees
92,551
More trees needed
1,851
CO₂ if planted / yr
40.7 t
Deforestation · 2001–2025
How much forest has Chongming lost?
There was almost no forest around Chongming 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.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
Forest gained and lost, 2000–2020
- Forest in 2000
- 336 ha
- Forest in 2020
- 630 ha
- Overall change
- +294 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Chongming grew from about 336 hectares to 630 hectares, a net gain of about 294 hectares (+88%). New forest grew on about 294 hectares, while under 1 hectare was 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 Chongming
What is the air quality (AQI) in Chongming right now?
The latest reading for Chongming shows an AQI of 71 (Moderate), measured Nov 11, 22:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Chongming Forest Park, Shanghai (崇明森林公园), 21.4 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Chongming today?
At AQI 71 (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 Chongming been like this week?
Over the last 7 days, the CAMS air-quality model put Chongming's daily AQI at 95 on average, from 52 on Nov 9 to an hourly peak of 173 on Nov 11. On 3 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Chongming lost since 2001?
There was almost no forest around Chongming 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 Chongming grew from about 336 hectares to 630 hectares, a net gain of about 294 hectares (+88%). New forest grew on about 294 hectares, while under 1 hectare was lost.
What is the tree count in Chongming?
Chongming has an estimated 90,700 trees across the 12.34 km² of land measured — 29.4% tree cover, 1 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Chongming need?
Chongming needs roughly 1,851 more trees to close a 1-point shortfall against its 30% tree-cover target — about 40.7 t of extra CO₂ absorbed per year once grown.
How are Chongming's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Chongming 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 Chongming District; the tree count is an estimate derived from that cover.
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