City report · Hainan, China
Wuzhishan Air quality today
Air quality in Wuzhishan currently reads AQI 51 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 51
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 9.1
- tree cover
- 69.9%
- trees in this area
- 218K
- more trees needed
- 0
Measured across a 2 km radius around Wuzhishan City, Hainan, China (12.57 km²), from a satellite image of Jul 12, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Wuzhishan · AQI 51 (Moderate)
Wuzhishan's tree count comes to 218,280 trees across 12.49 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Wuzhishan today: AQI 51, Moderate
Main pollutant: PM2.5 · Observed Nov 12, 00:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Wuzhishan (五指山), 1.8 km away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
9.1
PM10
21.6
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Hainan Environmental Protection Agency (海南省国土环境资源厅)
- 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 Wuzhishan's daily AQI at 39 on average, from 15 on Nov 4 to an hourly peak of 75 on Nov 10.
Where Wuzhishan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Wuzhishan: Healthy tree cover
69.9% tree cover against a 30% healthy-neighborhood target, across 12.49 km² of land.
Trees in this area
218,280
Target trees
218,280
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Wuzhishan lost?
Since 2001, the area within 10 km of Wuzhishan has lost about 2,360 hectares of forest (about 3,300 football pitches): 9% of the forest it had in 2000. Most of it (65%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from February 2017 of a 5 × 5 km area about 6 km west of the city center.
- Forest lost since 2001
- 2,360 haabout 3,300 football pitches
- Share of its forest
- 9%of what there was in 2000
- Cleared for good
- 1,540 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 39 hectares a year in 2021–2025, down from 88 hectares a year in 2016–2020. The worst year was 2014, when about 177 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 | 112 ha | 40 ha | 152 ha |
| 2002 | 54 ha | 16 ha | 70 ha |
| 2003 | 36 ha | 26 ha | 62 ha |
| 2004 | 70 ha | 64 ha | 134 ha |
| 2005 | 41 ha | 80 ha | 121 ha |
| 2006 | 39 ha | 38 ha | 77 ha |
| 2007 | 64 ha | 73 ha | 137 ha |
| 2008 | 28 ha | 16 ha | 44 ha |
| 2009 | 109 ha | 22 ha | 131 ha |
| 2010 | 107 ha | 38 ha | 145 ha |
| 2011 | 94 ha | 28 ha | 122 ha |
| 2012 | 80 ha | 73 ha | 153 ha |
| 2013 | 27 ha | 101 ha | 127 ha |
| 2014 | 131 ha | 46 ha | 177 ha |
| 2015 | 57 ha | 21 ha | 78 ha |
| 2016 | 54 ha | 9 ha | 63 ha |
| 2017 | 51 ha | 4 ha | 55 ha |
| 2018 | 115 ha | 5 ha | 120 ha |
| 2019 | 86 ha | 32 ha | 118 ha |
| 2020 | 36 ha | 49 ha | 84 ha |
| 2021 | 54 ha | 28 ha | 83 ha |
| 2022 | 5 ha | 5 ha | 10 ha |
| 2023 | 7 ha | under 1 ha | 7 ha |
| 2024 | 37 ha | 4 ha | 41 ha |
| 2025 | 47 ha | 8 ha | 54 ha |
What is causing deforestation around Wuzhishan?
- Farms, pasture and plantationscleared for good46% · 1,080 ha
- Loggingcan grow back34% · 800 ha
- Towns and roadscleared for good18% · 419 ha
Also: mining and energy, shifting farming, 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
- 29,000 ha
- Forest in 2020
- 28,700 ha
- Overall change
- −257 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Wuzhishan stayed about the same size, at about 28,700 hectares: new forest grew on about 306 hectares, and about 563 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 Wuzhishan
What is the air quality (AQI) in Wuzhishan right now?
The latest reading for Wuzhishan shows an AQI of 51 (Moderate), measured Nov 12, 00:00 local time by the Wuzhishan (五指山) ground monitoring station, 1.8 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 Wuzhishan today?
At AQI 51 (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 Wuzhishan been like this week?
Over the last 7 days, the CAMS air-quality model put Wuzhishan's daily AQI at 39 on average, from 15 on Nov 4 to an hourly peak of 75 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Wuzhishan lost since 2001?
Since 2001, the area within 10 km of Wuzhishan has lost about 2,360 hectares of forest (about 3,300 football pitches): 9% of the forest it had in 2000. Most of it (65%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss is slowing down: about 39 hectares a year in 2021–2025, down from 88 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Wuzhishan stayed about the same size, at about 28,700 hectares: new forest grew on about 306 hectares, and about 563 hectares were lost.
What is the tree count in Wuzhishan?
Wuzhishan has an estimated 218,280 trees across the 12.49 km² of land measured — 69.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Wuzhishan need?
Wuzhishan has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Wuzhishan's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Wuzhishan City, 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 Wuzhishan City; the tree count is an estimate derived from that cover.
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