City report · Zhejiang, China
Wenzhou Air quality today
Air quality in Wenzhou currently reads AQI 78 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 78
Moderate
- PM2.5, fine particles (µg/m³)
- 23.5
- tree cover
- 17.7%
- trees in this area
- 53.5K
- more trees needed
- 37.2K
Measured across a 2 km radius around Lucheng District, Wenzhou, Wenzhou, Zhejiang, China (12.57 km²), from a satellite image of Sep 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Wenzhou · AQI 78 (Moderate)
Wenzhou's tree count comes to 53,549 trees across 12.1 km² of land, 12 points below the 30% tree-cover level considered healthy for this area, so roughly 37,212 more trees would close the gap.
Air quality detail
Air quality in Wenzhou today: AQI 78, 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 · Ouhai, Wenzhou (温州市瓯海), 2.9 km away · median of 2 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
23.5
PM10
41.6
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Zhejiang Environmental Protection Bureau (浙江省环保厅门户)
- 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 Wenzhou's daily AQI at 78 on average, from 50 on Nov 9 to an hourly peak of 151 on Nov 5.
Where Wenzhou stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Wenzhou: Critically low
17.7% tree cover against a 30% healthy-neighborhood target, across 12.1 km² of land.
Trees in this area
53,549
Target trees
90,761
More trees needed
37,212
CO₂ if planted / yr
818.7 t
Deforestation · 2001–2025
How much forest has Wenzhou lost?
Since 2001, the area within 10 km of Wenzhou has lost about 45 hectares of forest (about 63 football pitches): 1.2% of the forest it had in 2000. Most of it (90%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from December 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 45 haabout 63 football pitches
- Share of its forest
- 1.2%of what there was in 2000
- Cleared for good
- 41 hadeforestation: turned into farms, mines or towns
The worst year was 2017, when about 7 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 | 1 ha | under 1 ha | 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 | 1 ha | under 1 ha | 2 ha |
| 2006 | 1 ha | under 1 ha | 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | 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 | 1 ha | under 1 ha | 2 ha |
| 2015 | 2 ha | under 1 ha | 3 ha |
| 2016 | 6 ha | under 1 ha | 6 ha |
| 2017 | 7 ha | under 1 ha | 7 ha |
| 2018 | 4 ha | under 1 ha | 4 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 | 7 ha | under 1 ha | 7 ha |
| 2023 | 4 ha | under 1 ha | 4 ha |
| 2024 | 2 ha | under 1 ha | 2 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Wenzhou?
- Towns and roadscleared for good88% · 40 ha
- Mining and energycleared for good2.2% · 1 ha
- Loggingcan grow back1.5% · 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
- 7,250 ha
- Forest in 2020
- 7,430 ha
- Overall change
- +179 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Wenzhou grew from about 7,250 hectares to 7,430 hectares, a net gain of about 179 hectares (+2.5%). New forest grew on about 252 hectares, while 73 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 Wenzhou
What is the air quality (AQI) in Wenzhou right now?
The latest reading for Wenzhou shows an AQI of 78 (Moderate), measured Nov 11, 22:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Ouhai, Wenzhou (温州市瓯海), 2.9 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Wenzhou today?
At AQI 78 (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 Wenzhou been like this week?
Over the last 7 days, the CAMS air-quality model put Wenzhou's daily AQI at 78 on average, from 50 on Nov 9 to an hourly peak of 151 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Wenzhou lost since 2001?
Since 2001, the area within 10 km of Wenzhou has lost about 45 hectares of forest (about 63 football pitches): 1.2% of the forest it had in 2000. Most of it (90%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Wenzhou grew from about 7,250 hectares to 7,430 hectares, a net gain of about 179 hectares (+2.5%). New forest grew on about 252 hectares, while 73 hectares were lost.
What is the tree count in Wenzhou?
Wenzhou has an estimated 53,549 trees across the 12.1 km² of land measured — 17.7% tree cover, 12 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Wenzhou need?
Wenzhou needs roughly 37,212 more trees to close a 12-point shortfall against its 30% tree-cover target — about 818.7 t of extra CO₂ absorbed per year once grown.
How are Wenzhou's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Lucheng 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 Lucheng District; the tree count is an estimate derived from that cover.
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