City report · Hunan, China
Leiyang Air quality today
Air quality in Leiyang currently reads AQI 57 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 57
Moderate
- PM2.5, fine particles (µg/m³)
- 15.1
- tree cover
- 21.4%
- trees in this area
- 61.9K
- more trees needed
- 24.9K
Measured across a 2 km radius around Leiyang, Hengyang, 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.
Leiyang · AQI 57 (Moderate)
Leiyang's tree count comes to 61,852 trees across 11.56 km² of land, 9 points below the 30% tree-cover level considered healthy for this area, so roughly 24,856 more trees would close the gap.
Air quality detail
Air quality in Leiyang today: AQI 57, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 19:00 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. Hengyang and Chenzhou
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
15.1
PM10
32.5
NO₂
34.1
O₃
58.0
SO₂
20.6
CO
1155.0
- 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 Leiyang's daily AQI at 70 on average, from 57 on Nov 8 to an hourly peak of 138 on Nov 11.
Where Leiyang stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Leiyang: Below target
21.4% tree cover against a 30% healthy-neighborhood target, across 11.56 km² of land.
Trees in this area
61,852
Target trees
86,708
More trees needed
24,856
CO₂ if planted / yr
546.8 t
Deforestation · 2001–2025
How much forest has Leiyang lost?
Since 2001, the area within 10 km of Leiyang has lost about 393 hectares of forest (about 550 football pitches): 16% of the forest it had in 2000. Most of it (67%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from September 2017 of a 5 × 5 km area about 6 km southeast of the city center.
- Forest lost since 2001
- 393 haabout 550 football pitches
- Share of its forest
- 16%of what there was in 2000
- Cleared for good
- 265 hadeforestation: turned into farms, mines or towns
The worst year was 2012, when about 41 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 | 8 ha | 8 ha | 16 ha |
| 2002 | 1 ha | 1 ha | 2 ha |
| 2003 | 4 ha | 2 ha | 6 ha |
| 2004 | 16 ha | 4 ha | 20 ha |
| 2005 | 3 ha | 2 ha | 5 ha |
| 2006 | 5 ha | under 1 ha | 5 ha |
| 2007 | 13 ha | 7 ha | 20 ha |
| 2008 | 15 ha | 6 ha | 20 ha |
| 2009 | 18 ha | 7 ha | 26 ha |
| 2010 | 20 ha | 13 ha | 32 ha |
| 2011 | under 1 ha | under 1 ha | 1 ha |
| 2012 | 36 ha | 5 ha | 41 ha |
| 2013 | 7 ha | 6 ha | 13 ha |
| 2014 | 2 ha | 6 ha | 8 ha |
| 2015 | 14 ha | 10 ha | 24 ha |
| 2016 | 24 ha | 2 ha | 26 ha |
| 2017 | 8 ha | 5 ha | 12 ha |
| 2018 | 17 ha | 5 ha | 22 ha |
| 2019 | 10 ha | 2 ha | 12 ha |
| 2020 | 9 ha | 5 ha | 14 ha |
| 2021 | 10 ha | 12 ha | 22 ha |
| 2022 | 7 ha | 5 ha | 12 ha |
| 2023 | 6 ha | 2 ha | 8 ha |
| 2024 | 7 ha | 5 ha | 12 ha |
| 2025 | 6 ha | 9 ha | 15 ha |
What is causing deforestation around Leiyang?
- Farms, pasture and plantationscleared for good35% · 138 ha
- Towns and roadscleared for good32% · 126 ha
- Loggingcan grow back31% · 123 ha
Also: 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
- 8,940 ha
- Forest in 2020
- 8,060 ha
- Overall change
- −880 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Leiyang shrank from about 8,940 hectares to 8,060 hectares, a net loss of about 880 hectares (−9.8%). New forest grew on about 215 hectares, but 1,090 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 Leiyang
What is the air quality (AQI) in Leiyang right now?
The latest reading for Leiyang shows an AQI of 57 (Moderate), observed Nov 11, 19:00 local time via Open-Meteo / CAMS, corrected with 12 ground-station cities within 205 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Leiyang today?
At AQI 57 (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 Leiyang been like this week?
Over the last 7 days, the CAMS air-quality model put Leiyang's daily AQI at 70 on average, from 57 on Nov 8 to an hourly peak of 138 on Nov 11. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Leiyang lost since 2001?
Since 2001, the area within 10 km of Leiyang has lost about 393 hectares of forest (about 550 football pitches): 16% of the forest it had in 2000. Most of it (67%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Leiyang shrank from about 8,940 hectares to 8,060 hectares, a net loss of about 880 hectares (−9.8%). New forest grew on about 215 hectares, but 1,090 hectares were lost.
What is the tree count in Leiyang?
Leiyang has an estimated 61,852 trees across the 11.56 km² of land measured — 21.4% tree cover, 9 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Leiyang need?
Leiyang needs roughly 24,856 more trees to close a 9-point shortfall against its 30% tree-cover target — about 546.8 t of extra CO₂ absorbed per year once grown.
How are Leiyang'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 Leiyang; the tree count is an estimate derived from that cover.
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