City report · Guangdong, China
Heyuan Air quality today
Air quality in Heyuan currently reads AQI 62 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 62
Moderate
- PM2.5, fine particles (µg/m³)
- 15.0
- tree cover
- 23.3%
- trees in this area
- 63.4K
- more trees needed
- 18.2K
Measured across a 2 km radius around Yuancheng District, Heyuan, Guangdong Province, China (12.57 km²), from a satellite image of Sep 12, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Heyuan · AQI 62 (Moderate)
Heyuan's tree count comes to 63,390 trees across 10.89 km² of land, 7 points below the 30% tree-cover level considered healthy for this area, so roughly 18,228 more trees would close the gap.
Air quality detail
Air quality in Heyuan today: AQI 62, 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 · Old Town, Heyuan (河源老城), 1.3 km away · median of 3 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
15.0
PM10
37.8
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Guangdong Environmental Protection public network (广东环境保护公众网)
- 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 Heyuan's daily AQI at 53 on average, from 32 on Nov 10 to an hourly peak of 106 on Nov 5.
Where Heyuan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Heyuan: Below target
23.3% tree cover against a 30% healthy-neighborhood target, across 10.89 km² of land.
Trees in this area
63,390
Target trees
81,618
More trees needed
18,228
CO₂ if planted / yr
401.0 t
Deforestation · 2001–2025
How much forest has Heyuan lost?
Since 2001, the area within 10 km of Heyuan has lost about 1,640 hectares of forest (about 2,300 football pitches): 14% of the forest it had in 2000. Most of it (56%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from January 2017 of a 5 × 5 km area about 7 km east of the city center.
- Forest lost since 2001
- 1,640 haabout 2,300 football pitches
- Share of its forest
- 14%of what there was in 2000
- Cleared for good
- 925 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 37 hectares a year in 2021–2025, down from 68 hectares a year in 2016–2020. The worst year was 2004, when about 201 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 | 25 ha | 24 ha | 49 ha |
| 2002 | 50 ha | 13 ha | 63 ha |
| 2003 | 11 ha | 3 ha | 14 ha |
| 2004 | 105 ha | 96 ha | 201 ha |
| 2005 | 38 ha | 19 ha | 57 ha |
| 2006 | 54 ha | 31 ha | 84 ha |
| 2007 | 26 ha | 22 ha | 48 ha |
| 2008 | 9 ha | 35 ha | 45 ha |
| 2009 | 54 ha | 22 ha | 75 ha |
| 2010 | 61 ha | 31 ha | 92 ha |
| 2011 | 69 ha | 23 ha | 92 ha |
| 2012 | 65 ha | 20 ha | 84 ha |
| 2013 | 16 ha | 96 ha | 112 ha |
| 2014 | 28 ha | 38 ha | 67 ha |
| 2015 | 17 ha | 12 ha | 29 ha |
| 2016 | 29 ha | 24 ha | 53 ha |
| 2017 | 45 ha | 59 ha | 104 ha |
| 2018 | 20 ha | 38 ha | 59 ha |
| 2019 | 19 ha | 15 ha | 35 ha |
| 2020 | 63 ha | 26 ha | 90 ha |
| 2021 | 30 ha | 17 ha | 48 ha |
| 2022 | 46 ha | 6 ha | 51 ha |
| 2023 | 24 ha | 11 ha | 36 ha |
| 2024 | 8 ha | 16 ha | 23 ha |
| 2025 | 14 ha | 13 ha | 27 ha |
What is causing deforestation around Heyuan?
- Loggingcan grow back40% · 663 ha
- Towns and roadscleared for good38% · 622 ha
- Mining and energycleared for good16% · 269 ha
Also: wildfires, farms, pasture and plantations, storms, floods and other natural causes, 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
- 15,400 ha
- Forest in 2020
- 14,300 ha
- Overall change
- −1,060 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Heyuan shrank from about 15,400 hectares to 14,300 hectares, a net loss of about 1,060 hectares (−6.9%). New forest grew on about 209 hectares, but 1,270 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 Heyuan
What is the air quality (AQI) in Heyuan right now?
The latest reading for Heyuan shows an AQI of 62 (Moderate), measured Nov 11, 22:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Old Town, Heyuan (河源老城), 1.3 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Heyuan today?
At AQI 62 (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 Heyuan been like this week?
Over the last 7 days, the CAMS air-quality model put Heyuan's daily AQI at 53 on average, from 32 on Nov 10 to an hourly peak of 106 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 Heyuan lost since 2001?
Since 2001, the area within 10 km of Heyuan has lost about 1,640 hectares of forest (about 2,300 football pitches): 14% of the forest it had in 2000. Most of it (56%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is slowing down: about 37 hectares a year in 2021–2025, down from 68 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Heyuan shrank from about 15,400 hectares to 14,300 hectares, a net loss of about 1,060 hectares (−6.9%). New forest grew on about 209 hectares, but 1,270 hectares were lost.
What is the tree count in Heyuan?
Heyuan has an estimated 63,390 trees across the 10.89 km² of land measured — 23.3% tree cover, 7 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Heyuan need?
Heyuan needs roughly 18,228 more trees to close a 7-point shortfall against its 30% tree-cover target — about 401.0 t of extra CO₂ absorbed per year once grown.
How are Heyuan's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Yuancheng 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 Yuancheng District; the tree count is an estimate derived from that cover.
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