City report · Fujian, China
Longyan Air quality today
Air quality in Longyan currently reads AQI 75 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 75
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 22.1
- tree cover
- 29.6%
- trees in this area
- 93.0K
- more trees needed
- 1.3K
Measured across a 2 km radius around Xinluo District, Longyan, Fujian, China (12.57 km²), from a satellite image of Aug 8, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Longyan · AQI 75 (Moderate)
Longyan's tree count comes to 92,991 trees across 12.57 km², 0 points below the 30% tree-cover level considered healthy for this area, so roughly 1,257 more trees would close the gap.
Air quality detail
Air quality in Longyan today: AQI 75, Moderate
Main pollutant: PM2.5 · Observed Nov 12, 01:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Minxi Vocational and Technical College, Longyan (龙岩闽西职业技术学院), 1.3 km away · median of 3 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
22.1
PM10
30.2
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Department of Ecology and Environment of Fujian Province (福建省生态环境厅), China National Urban air quality real-time publishing platform (全国城市空气质量实时发布平台)
- 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 Longyan's daily AQI at 54 on average, from 38 on Nov 9 to an hourly peak of 122 on Nov 5.
Where Longyan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Longyan: Below target
29.6% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
92,991
Target trees
94,248
More trees needed
1,257
CO₂ if planted / yr
27.7 t
Deforestation · 2001–2025
How much forest has Longyan lost?
Since 2001, the area within 10 km of Longyan has lost about 2,930 hectares of forest (about 4,100 football pitches): 16% of the forest it had in 2000. Most of it (51%) was deforestation, forest cleared for good, mainly for towns and roads.
2018: satellite photo from December 2017 of a 5 × 5 km area about 5 km west of the city center.
- Forest lost since 2001
- 2,930 haabout 4,100 football pitches
- Share of its forest
- 16%of what there was in 2000
- Cleared for good
- 1,490 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 83 hectares a year in 2021–2025, down from 136 hectares a year in 2016–2020. The worst year was 2016, when about 279 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 | 9 ha | 11 ha | 20 ha |
| 2002 | 28 ha | 58 ha | 87 ha |
| 2003 | 23 ha | 30 ha | 52 ha |
| 2004 | 82 ha | 156 ha | 238 ha |
| 2005 | 77 ha | 93 ha | 170 ha |
| 2006 | 72 ha | 40 ha | 112 ha |
| 2007 | 42 ha | 36 ha | 78 ha |
| 2008 | 85 ha | 36 ha | 121 ha |
| 2009 | 140 ha | 72 ha | 212 ha |
| 2010 | 86 ha | 82 ha | 168 ha |
| 2011 | 65 ha | 96 ha | 161 ha |
| 2012 | 58 ha | 49 ha | 107 ha |
| 2013 | 69 ha | 16 ha | 85 ha |
| 2014 | 79 ha | 54 ha | 132 ha |
| 2015 | 56 ha | 33 ha | 89 ha |
| 2016 | 113 ha | 166 ha | 279 ha |
| 2017 | 73 ha | 90 ha | 163 ha |
| 2018 | 45 ha | 29 ha | 74 ha |
| 2019 | 57 ha | 29 ha | 87 ha |
| 2020 | 42 ha | 37 ha | 79 ha |
| 2021 | 41 ha | 25 ha | 66 ha |
| 2022 | 36 ha | 35 ha | 71 ha |
| 2023 | 18 ha | 57 ha | 75 ha |
| 2024 | 42 ha | 71 ha | 113 ha |
| 2025 | 49 ha | 41 ha | 90 ha |
What is causing deforestation around Longyan?
- Loggingcan grow back49% · 1,440 ha
- Towns and roadscleared for good41% · 1,190 ha
- Mining and energycleared for good9.3% · 273 ha
Also: 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
- 21,200 ha
- Forest in 2020
- 19,800 ha
- Overall change
- −1,440 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Longyan shrank from about 21,200 hectares to 19,800 hectares, a net loss of about 1,440 hectares (−6.8%). New forest grew on about 144 hectares, but 1,590 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 Longyan
What is the air quality (AQI) in Longyan right now?
The latest reading for Longyan shows an AQI of 75 (Moderate), measured Nov 12, 01:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Minxi Vocational and Technical College, Longyan (龙岩闽西职业技术学院), 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 Longyan today?
At AQI 75 (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 Longyan been like this week?
Over the last 7 days, the CAMS air-quality model put Longyan's daily AQI at 54 on average, from 38 on Nov 9 to an hourly peak of 122 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 Longyan lost since 2001?
Since 2001, the area within 10 km of Longyan has lost about 2,930 hectares of forest (about 4,100 football pitches): 16% of the forest it had in 2000. Most of it (51%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss is slowing down: about 83 hectares a year in 2021–2025, down from 136 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Longyan shrank from about 21,200 hectares to 19,800 hectares, a net loss of about 1,440 hectares (−6.8%). New forest grew on about 144 hectares, but 1,590 hectares were lost.
What is the tree count in Longyan?
Longyan has an estimated 92,991 trees across the 12.57 km² measured — 29.6% tree cover, 0 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Longyan need?
Longyan needs roughly 1,257 more trees to close a 0-point shortfall against its 30% tree-cover target — about 27.7 t of extra CO₂ absorbed per year once grown.
How are Longyan's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Xinluo 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 Xinluo District; the tree count is an estimate derived from that cover.
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