City report · Jilin, China
Longjing Air quality today
Air quality in Longjing currently reads AQI 181 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
AQI 181
Air quality right now
Unhealthy
- PM2.5, fine particles (µg/m³)
- 102.3
- tree cover
- 19.6%
- trees in this area
- 60.7K
- more trees needed
- 63.1K
Measured across a 2 km radius around Longjing, Jilin, Yanbian Korean Autonomous Prefecture, Jilin, China (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Longjing · AQI 181 (Unhealthy)
Longjing's tree count comes to 60,652 trees across 12.38 km² of land, 20 points below the 40% tree-cover level considered healthy for this area, so roughly 63,127 more trees would close the gap.
Air quality detail
Air quality in Longjing today: AQI 181, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 06:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 205 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 205 km, e.g. Mudanjiang and Mudanjiang
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
102.3
PM10
48.3
NO₂
16.7
O₃
25.0
SO₂
15.5
CO
548.0
- Outdoor exercise
- Everyone should cut down long or hard exercise; sensitive groups should avoid it
- Windows
- Keep them closed
- Mask
- Wear an N95 outdoors
- Air purifier
- Run one
Over the last 7 days, the CAMS air-quality model put Longjing's daily AQI at 63 on average, from 35 on Nov 7 to an hourly peak of 109 on Nov 5.
Where Longjing stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Longjing: Critically low
19.6% tree cover against a 40% healthy-neighborhood target, across 12.38 km² of land.
Trees in this area
60,652
Target trees
123,779
More trees needed
63,127
CO₂ if planted / yr
1,389 t
Deforestation · 2001–2025
How much forest has Longjing lost?
Since 2001, the area within 10 km of Longjing has lost about 1,180 hectares of forest (about 1,600 football pitches): 18% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 35 hectares (3%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km south of the city center.
- Forest lost since 2001
- 1,180 haabout 1,600 football pitches
- Share of its forest
- 18%of what there was in 2000
- Cleared for good
- 35 hadeforestation: turned into farms, mines or towns
Forest loss is speeding up: about 112 hectares a year in 2021–2025, up from 77 hectares a year in 2016–2020. The worst year was 2023, when about 163 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 | under 1 ha | 6 ha | 6 ha |
| 2002 | under 1 ha | 6 ha | 6 ha |
| 2003 | under 1 ha | 1 ha | 1 ha |
| 2004 | under 1 ha | 19 ha | 19 ha |
| 2005 | under 1 ha | 2 ha | 2 ha |
| 2006 | under 1 ha | 9 ha | 10 ha |
| 2007 | 2 ha | 10 ha | 12 ha |
| 2008 | under 1 ha | 11 ha | 11 ha |
| 2009 | under 1 ha | 8 ha | 8 ha |
| 2010 | under 1 ha | 12 ha | 12 ha |
| 2011 | under 1 ha | 24 ha | 24 ha |
| 2012 | under 1 ha | 11 ha | 11 ha |
| 2013 | 2 ha | 39 ha | 40 ha |
| 2014 | under 1 ha | 22 ha | 23 ha |
| 2015 | 2 ha | 49 ha | 51 ha |
| 2016 | 2 ha | 13 ha | 15 ha |
| 2017 | under 1 ha | 55 ha | 55 ha |
| 2018 | under 1 ha | 62 ha | 62 ha |
| 2019 | 3 ha | 151 ha | 153 ha |
| 2020 | 9 ha | 87 ha | 96 ha |
| 2021 | 9 ha | 97 ha | 105 ha |
| 2022 | under 1 ha | 123 ha | 123 ha |
| 2023 | 4 ha | 159 ha | 163 ha |
| 2024 | under 1 ha | 92 ha | 92 ha |
| 2025 | under 1 ha | 75 ha | 75 ha |
What is causing deforestation around Longjing?
- Loggingcan grow back94% · 1,110 ha
- Mining and energycleared for good2.3% · 27 ha
- Wildfirescan grow back1.7% · 20 ha
Also: towns and roads, 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
- 9,480 ha
- Forest in 2020
- 11,400 ha
- Overall change
- +1,970 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Longjing grew from about 9,480 hectares to 11,400 hectares, a net gain of about 1,970 hectares (+21%). New forest grew on about 2,360 hectares, while 395 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 Longjing
What is the air quality (AQI) in Longjing right now?
The latest reading for Longjing shows an AQI of 181 (Unhealthy), observed Nov 11, 06:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 205 km, US EPA index. The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Longjing today?
At AQI 181 (Unhealthy): everyone should cut down long or hard exercise; sensitive groups should avoid it. Windows: keep them closed. Masks: wear an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Longjing been like this week?
Over the last 7 days, the CAMS air-quality model put Longjing's daily AQI at 63 on average, from 35 on Nov 7 to an hourly peak of 109 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 Longjing lost since 2001?
Since 2001, the area within 10 km of Longjing has lost about 1,180 hectares of forest (about 1,600 football pitches): 18% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 35 hectares (3%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is speeding up: about 112 hectares a year in 2021–2025, up from 77 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Longjing grew from about 9,480 hectares to 11,400 hectares, a net gain of about 1,970 hectares (+21%). New forest grew on about 2,360 hectares, while 395 hectares were lost.
What is the tree count in Longjing?
Longjing has an estimated 60,652 trees across the 12.38 km² of land measured — 19.6% tree cover, 20 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Longjing need?
Longjing needs roughly 63,127 more trees to close a 20-point shortfall against its 40% tree-cover target — about 1,389 t of extra CO₂ absorbed per year once grown.
How are Longjing'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 Longjing; the tree count is an estimate derived from that cover.
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