City report · Hunan, China
Guankou Air quality today
Air quality in Guankou currently reads AQI 47 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 47
Good
- PM2.5, fine particles (µg/m³)
- 8.6
- tree cover
- 15.5%
- trees in this area
- 48.2K
- more trees needed
- 45.1K
Measured across a 2 km radius around Liuyang, Changsha, Hunan, China (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Guankou · AQI 47 (Good)
Guankou's tree count comes to 48,208 trees across 12.44 km² of land, 14 points below the 30% tree-cover level considered healthy for this area, so roughly 45,098 more trees would close the gap.
Air quality detail
Air quality in Guankou today: AQI 47, Good
Main pollutant: PM2.5 · Observed Nov 10, 17:00 local time via Open-Meteo / CAMS, corrected with 12 ground-station cities within 205 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 12 station cities within 205 km, e.g. Zhuzhou and Pingxiang
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.6
PM10
19.3
NO₂
6.0
O₃
80.0
SO₂
6.6
CO
253.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Guankou's daily AQI at 59 on average, from 49 on Nov 8 to an hourly peak of 98 on Nov 10.
Where Guankou stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Guankou: Critically low
15.5% tree cover against a 30% healthy-neighborhood target, across 12.44 km² of land.
Trees in this area
48,208
Target trees
93,306
More trees needed
45,098
CO₂ if planted / yr
992.2 t
Deforestation · 2001–2025
How much forest has Guankou lost?
Since 2001, the area within 10 km of Guankou has lost about 1,730 hectares of forest (about 2,400 football pitches): 10% of the forest it had in 2000. Most of it (82%) was deforestation, forest cleared for good, mainly for towns and roads.
2018: satellite photo from November 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 1,730 haabout 2,400 football pitches
- Share of its forest
- 10%of what there was in 2000
- Cleared for good
- 1,420 hadeforestation: turned into farms, mines or towns
Forest loss is speeding up: about 91 hectares a year in 2021–2025, up from 64 hectares a year in 2016–2020. The worst year was 2024, when about 174 hectares of forest were lost.
Guankou's full deforestation reportHectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 12 ha | 2 ha | 14 ha |
| 2002 | 8 ha | 2 ha | 10 ha |
| 2003 | 38 ha | 4 ha | 42 ha |
| 2004 | 70 ha | 22 ha | 92 ha |
| 2005 | 26 ha | 13 ha | 39 ha |
| 2006 | 22 ha | under 1 ha | 22 ha |
| 2007 | 58 ha | 17 ha | 75 ha |
| 2008 | 78 ha | 18 ha | 96 ha |
| 2009 | 117 ha | 26 ha | 143 ha |
| 2010 | 156 ha | 9 ha | 165 ha |
| 2011 | 43 ha | 7 ha | 50 ha |
| 2012 | 49 ha | 9 ha | 57 ha |
| 2013 | 79 ha | 4 ha | 82 ha |
| 2014 | 40 ha | 7 ha | 47 ha |
| 2015 | 22 ha | 2 ha | 23 ha |
| 2016 | 47 ha | 10 ha | 57 ha |
| 2017 | 43 ha | 9 ha | 53 ha |
| 2018 | 72 ha | 19 ha | 91 ha |
| 2019 | 49 ha | 30 ha | 79 ha |
| 2020 | 30 ha | 9 ha | 39 ha |
| 2021 | 11 ha | 6 ha | 17 ha |
| 2022 | 14 ha | 5 ha | 19 ha |
| 2023 | 63 ha | 35 ha | 98 ha |
| 2024 | 139 ha | 35 ha | 174 ha |
| 2025 | 135 ha | 10 ha | 145 ha |
What is causing deforestation around Guankou?
- Towns and roadscleared for good76% · 1,310 ha
- Loggingcan grow back18% · 304 ha
- Mining and energycleared for good6.7% · 116 ha
Also: 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
- 23,500 ha
- Forest in 2020
- 22,800 ha
- Overall change
- −728 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Guankou shrank from about 23,500 hectares to 22,800 hectares, a net loss of about 728 hectares (−3.1%). New forest grew on about 144 hectares, but 873 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 Guankou
What is the air quality (AQI) in Guankou right now?
The latest reading for Guankou shows an AQI of 47 (Good), observed Nov 10, 17:00 local time via Open-Meteo / CAMS, corrected with 12 ground-station cities within 205 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Guankou today?
At AQI 47 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Guankou been like this week?
Over the last 7 days, the CAMS air-quality model put Guankou's daily AQI at 59 on average, from 49 on Nov 8 to an hourly peak of 98 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 Guankou lost since 2001?
Since 2001, the area within 10 km of Guankou has lost about 1,730 hectares of forest (about 2,400 football pitches): 10% of the forest it had in 2000. Most of it (82%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is speeding up: about 91 hectares a year in 2021–2025, up from 64 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Guankou shrank from about 23,500 hectares to 22,800 hectares, a net loss of about 728 hectares (−3.1%). New forest grew on about 144 hectares, but 873 hectares were lost.
What is the tree count in Guankou?
Guankou has an estimated 48,208 trees across the 12.44 km² of land measured — 15.5% tree cover, 14 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Guankou need?
Guankou needs roughly 45,098 more trees to close a 14-point shortfall against its 30% tree-cover target — about 992.2 t of extra CO₂ absorbed per year once grown.
How are Guankou's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 Liuyang; the tree count is an estimate derived from that cover.
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