City report · Guangdong, China
Haimen Air quality today
Air quality in Haimen currently reads AQI 56 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 56
Moderate
- PM2.5, fine particles (µg/m³)
- 12.0
- tree cover
- 23.7%
- trees in this area
- 43.6K
- more trees needed
- 11.6K
Measured across a 2 km radius around Chaoyang, Shantou, Guangdong Province, China (12.57 km²), from a satellite image of Sep 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Haimen · AQI 56 (Moderate)
Haimen's tree count comes to 43,631 trees across 7.37 km² of land, 6 points below the 30% tree-cover level considered healthy for this area, so roughly 11,598 more trees would close the gap.
Air quality detail
Air quality in Haimen today: AQI 56, 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 · Cháoyángzi, Shantou (汕头潮阳子站), 6.7 km away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
12.0
PM10
25.9
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project
- 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 Haimen's daily AQI at 63 on average, from 45 on Nov 10 to an hourly peak of 113 on Nov 5.
Where Haimen stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Haimen: Below target
23.7% tree cover against a 30% healthy-neighborhood target, across 7.37 km² of land.
Trees in this area
43,631
Target trees
55,229
More trees needed
11,598
CO₂ if planted / yr
255.2 t
Deforestation · 2001–2025
How much forest has Haimen lost?
Since 2001, the area within 10 km of Haimen has lost about 123 hectares of forest (about 170 football pitches): 10% of the forest it had in 2000. Most of it (89%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from October 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 123 haabout 170 football pitches
- Share of its forest
- 10%of what there was in 2000
- Cleared for good
- 110 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 22 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 | 12 ha | under 1 ha | 13 ha |
| 2002 | 2 ha | under 1 ha | 2 ha |
| 2003 | 4 ha | under 1 ha | 4 ha |
| 2004 | 10 ha | under 1 ha | 11 ha |
| 2005 | 2 ha | under 1 ha | 2 ha |
| 2006 | 5 ha | 2 ha | 7 ha |
| 2007 | 9 ha | 4 ha | 13 ha |
| 2008 | 5 ha | under 1 ha | 5 ha |
| 2009 | 10 ha | under 1 ha | 11 ha |
| 2010 | 20 ha | 2 ha | 22 ha |
| 2011 | 7 ha | under 1 ha | 7 ha |
| 2012 | 4 ha | 1 ha | 5 ha |
| 2013 | 2 ha | under 1 ha | 2 ha |
| 2014 | 1 ha | under 1 ha | 1 ha |
| 2015 | 3 ha | under 1 ha | 3 ha |
| 2016 | 2 ha | under 1 ha | 2 ha |
| 2017 | 8 ha | under 1 ha | 8 ha |
| 2018 | 2 ha | under 1 ha | 2 ha |
| 2019 | 1 ha | under 1 ha | 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 Haimen?
- Towns and roadscleared for good72% · 89 ha
- Farms, pasture and plantationscleared for good17% · 21 ha
- Storms, floods and other natural causescan grow back3.4% · 4 ha
Also: logging, mining and energy, 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
- 1,430 ha
- Forest in 2020
- 1,290 ha
- Overall change
- −144 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Haimen shrank from about 1,430 hectares to 1,290 hectares, a net loss of about 144 hectares (−10%). New forest grew on about 78 hectares, but 222 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 Haimen
What is the air quality (AQI) in Haimen right now?
The latest reading for Haimen shows an AQI of 56 (Moderate), measured Nov 11, 22:00 local time by the Cháoyángzi, Shantou (汕头潮阳子站) ground monitoring station, 6.7 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 Haimen today?
At AQI 56 (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 Haimen been like this week?
Over the last 7 days, the CAMS air-quality model put Haimen's daily AQI at 63 on average, from 45 on Nov 10 to an hourly peak of 113 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 Haimen lost since 2001?
Since 2001, the area within 10 km of Haimen has lost about 123 hectares of forest (about 170 football pitches): 10% of the forest it had in 2000. Most of it (89%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Haimen shrank from about 1,430 hectares to 1,290 hectares, a net loss of about 144 hectares (−10%). New forest grew on about 78 hectares, but 222 hectares were lost.
What is the tree count in Haimen?
Haimen has an estimated 43,631 trees across the 7.37 km² of land measured — 23.7% tree cover, 6 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Haimen need?
Haimen needs roughly 11,598 more trees to close a 6-point shortfall against its 30% tree-cover target — about 255.2 t of extra CO₂ absorbed per year once grown.
How are Haimen's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Chaoyang, 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 Chaoyang; the tree count is an estimate derived from that cover.
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