City report · Zhejiang, China
Jiaxing Air quality today
Air quality in Jiaxing currently reads AQI 79 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 79
Moderate
- PM2.5, fine particles (µg/m³)
- 24.0
- tree cover
- 36.3%
- trees in this area
- 107K
- more trees needed
- 0
Measured across a 2 km radius around Nanhu District, Jiaxing, Zhejiang, China (12.57 km²), from a satellite image of Sep 14, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Jiaxing · AQI 79 (Moderate)
Jiaxing's tree count comes to 107,426 trees across 11.84 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Jiaxing today: AQI 79, 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 · Jiaxing (嘉兴市), 800 m away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
24.0
PM10
44.3
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 Jiaxing's daily AQI at 100 on average, from 62 on Nov 8 to an hourly peak of 188 on Nov 11.
Where Jiaxing stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Jiaxing: Healthy tree cover
36.3% tree cover against a 30% healthy-neighborhood target, across 11.84 km² of land.
Trees in this area
107,426
Target trees
107,426
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Jiaxing lost?
Since 2001, the area within 10 km of Jiaxing has lost about 2 hectares of forest: 1.6% of the forest it had in 2000. Most of it (79%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 2 ha
- Share of its forest
- 1.6%of what there was in 2000
- Cleared for good
- 2 hadeforestation: turned into farms, mines or towns
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 Jiaxing?
- Towns and roadscleared for good74% · 1 ha
- Storms, floods and other natural causescan grow back5.3% · under 1 ha
- Unknown causescause unknown16% · under 1 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
- 1,520 ha
- Forest in 2020
- 2,350 ha
- Overall change
- +822 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Jiaxing grew from about 1,520 hectares to 2,350 hectares, a net gain of about 822 hectares (+54%). New forest grew on about 828 hectares, while 6 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 Jiaxing
What is the air quality (AQI) in Jiaxing right now?
The latest reading for Jiaxing shows an AQI of 79 (Moderate), measured Nov 11, 22:00 local time by the Jiaxing (嘉兴市) ground monitoring station, 800 m 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 Jiaxing today?
At AQI 79 (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 Jiaxing been like this week?
Over the last 7 days, the CAMS air-quality model put Jiaxing's daily AQI at 100 on average, from 62 on Nov 8 to an hourly peak of 188 on Nov 11. On 2 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Jiaxing lost since 2001?
Since 2001, the area within 10 km of Jiaxing has lost about 2 hectares of forest: 1.6% of the forest it had in 2000. Most of it (79%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Jiaxing grew from about 1,520 hectares to 2,350 hectares, a net gain of about 822 hectares (+54%). New forest grew on about 828 hectares, while 6 hectares were lost.
What is the tree count in Jiaxing?
Jiaxing has an estimated 107,426 trees across the 11.84 km² of land measured — 36.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Jiaxing need?
Jiaxing has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Jiaxing's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Nanhu 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 Nanhu District; the tree count is an estimate derived from that cover.
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