City report · Hainan, China
Sanya Air quality today
Air quality in Sanya currently reads AQI 64 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 64
Moderate
- PM2.5, fine particles (µg/m³)
- 15.9
- tree cover
- 39.3%
- trees in this area
- 103K
- more trees needed
- 0
Measured across a 2 km radius around Tianya District, Sanya, Hainan, China (12.57 km²), from a satellite image of Sep 8, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Sanya · AQI 64 (Moderate)
Sanya's tree count comes to 102,969 trees across 10.48 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Sanya today: AQI 64, 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 · Hedongzi Station, Sanya (三亚河东子站), 600 m away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
15.9
PM10
23.8
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 Sanya's daily AQI at 48 on average, from 35 on Nov 9 to an hourly peak of 75 on Nov 10.
Where Sanya stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Sanya: Healthy tree cover
39.3% tree cover against a 30% healthy-neighborhood target, across 10.48 km² of land.
Trees in this area
102,969
Target trees
102,969
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Sanya lost?
Since 2001, the area within 10 km of Sanya has lost about 1,250 hectares of forest (about 1,800 football pitches): 20% of the forest it had in 2000. Most of it (99%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from February 2017 of a 5 × 5 km area about 7 km east of the city center.
- Forest lost since 2001
- 1,250 haabout 1,800 football pitches
- Share of its forest
- 20%of what there was in 2000
- Cleared for good
- 1,240 hadeforestation: turned into farms, mines or towns
The worst year was 2009, when about 133 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 | 79 ha | under 1 ha | 79 ha |
| 2002 | 18 ha | under 1 ha | 18 ha |
| 2003 | 119 ha | under 1 ha | 119 ha |
| 2004 | 127 ha | 1 ha | 128 ha |
| 2005 | 70 ha | under 1 ha | 70 ha |
| 2006 | 35 ha | under 1 ha | 35 ha |
| 2007 | 96 ha | under 1 ha | 97 ha |
| 2008 | 31 ha | 2 ha | 34 ha |
| 2009 | 132 ha | 1 ha | 133 ha |
| 2010 | 97 ha | 2 ha | 99 ha |
| 2011 | 56 ha | under 1 ha | 57 ha |
| 2012 | 66 ha | under 1 ha | 66 ha |
| 2013 | 28 ha | under 1 ha | 28 ha |
| 2014 | 42 ha | under 1 ha | 42 ha |
| 2015 | 8 ha | under 1 ha | 8 ha |
| 2016 | 10 ha | under 1 ha | 10 ha |
| 2017 | 20 ha | under 1 ha | 20 ha |
| 2018 | 13 ha | under 1 ha | 13 ha |
| 2019 | 18 ha | under 1 ha | 18 ha |
| 2020 | 20 ha | under 1 ha | 20 ha |
| 2021 | 37 ha | under 1 ha | 38 ha |
| 2022 | 12 ha | under 1 ha | 12 ha |
| 2023 | 39 ha | under 1 ha | 39 ha |
| 2024 | 19 ha | under 1 ha | 20 ha |
| 2025 | 53 ha | under 1 ha | 53 ha |
What is causing deforestation around Sanya?
- Towns and roadscleared for good60% · 750 ha
- Farms, pasture and plantationscleared for good32% · 398 ha
- Mining and energycleared for good7.5% · 94 ha
Also: logging, 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
- 8,240 ha
- Forest in 2020
- 7,890 ha
- Overall change
- −355 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Sanya shrank from about 8,240 hectares to 7,890 hectares, a net loss of about 355 hectares (−4.3%). New forest grew on about 500 hectares, but 855 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 Sanya
What is the air quality (AQI) in Sanya right now?
The latest reading for Sanya shows an AQI of 64 (Moderate), measured Nov 11, 22:00 local time by the Hedongzi Station, Sanya (三亚河东子站) ground monitoring station, 600 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 Sanya today?
At AQI 64 (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 Sanya been like this week?
Over the last 7 days, the CAMS air-quality model put Sanya's daily AQI at 48 on average, from 35 on Nov 9 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 Sanya lost since 2001?
Since 2001, the area within 10 km of Sanya has lost about 1,250 hectares of forest (about 1,800 football pitches): 20% of the forest it had in 2000. Most of it (99%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Sanya shrank from about 8,240 hectares to 7,890 hectares, a net loss of about 355 hectares (−4.3%). New forest grew on about 500 hectares, but 855 hectares were lost.
What is the tree count in Sanya?
Sanya has an estimated 102,969 trees across the 10.48 km² of land measured — 39.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Sanya need?
Sanya has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Sanya's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Tianya 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 Tianya District; the tree count is an estimate derived from that cover.
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