City report · Jilin, China
Yanji Air quality today
Air quality in Yanji currently reads AQI 172 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 172
Unhealthy
- PM2.5, fine particles (µg/m³)
- 86.1
- tree cover
- 5.8%
- trees in this area
- 17.3K
- more trees needed
- 102K
Measured across a 2 km radius around Yanji, Yanbian Korean Autonomous Prefecture, Jilin, China (12.57 km²), from a satellite image of Sep 18, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Yanji · AQI 172 (Unhealthy)
Yanji's tree count comes to 17,274 trees across 11.92 km² of land, 34 points below the 40% tree-cover level considered healthy for this area, so roughly 101,855 more trees would close the gap.
Air quality detail
Air quality in Yanji today: AQI 172, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 03:00 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
86.1
PM10
43.5
NO₂
19.7
O₃
26.0
SO₂
14.9
CO
1048.0
- 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 Yanji's daily AQI at 62 on average, from 35 on Nov 7 to an hourly peak of 109 on Nov 5.
Where Yanji stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Yanji: Critically low
5.8% tree cover against a 40% healthy-neighborhood target, across 11.92 km² of land.
Trees in this area
17,274
Target trees
119,129
More trees needed
101,855
CO₂ if planted / yr
2,241 t
Deforestation · 2001–2025
How much forest has Yanji lost?
Since 2001, the area within 10 km of Yanji has lost about 155 hectares of forest (about 220 football pitches): 5.1% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 34 hectares (22%) 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 southwest of the city center.
- Forest lost since 2001
- 155 haabout 220 football pitches
- Share of its forest
- 5.1%of what there was in 2000
- Cleared for good
- 34 hadeforestation: turned into farms, mines or towns
The worst year was 2023, when about 27 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 | 1 ha | under 1 ha | 2 ha |
| 2002 | 1 ha | 2 ha | 3 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 2 ha | under 1 ha | 2 ha |
| 2005 | under 1 ha | 1 ha | 1 ha |
| 2006 | under 1 ha | 1 ha | 1 ha |
| 2007 | under 1 ha | 1 ha | 2 ha |
| 2008 | under 1 ha | 1 ha | 2 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | 2 ha | 2 ha |
| 2011 | 3 ha | 3 ha | 6 ha |
| 2012 | 7 ha | under 1 ha | 7 ha |
| 2013 | 2 ha | under 1 ha | 2 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | 2 ha | 2 ha |
| 2017 | under 1 ha | 6 ha | 6 ha |
| 2018 | 1 ha | 7 ha | 8 ha |
| 2019 | 4 ha | 17 ha | 22 ha |
| 2020 | 1 ha | 6 ha | 7 ha |
| 2021 | 2 ha | 14 ha | 16 ha |
| 2022 | 2 ha | 16 ha | 18 ha |
| 2023 | 1 ha | 26 ha | 27 ha |
| 2024 | under 1 ha | 6 ha | 6 ha |
| 2025 | 4 ha | 8 ha | 12 ha |
What is causing deforestation around Yanji?
- Loggingcan grow back65% · 101 ha
- Towns and roadscleared for good20% · 32 ha
- Wildfirescan grow back5.6% · 9 ha
Also: storms, floods and other natural causes, farms, pasture and plantations, 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
- 4,610 ha
- Forest in 2020
- 5,370 ha
- Overall change
- +762 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Yanji grew from about 4,610 hectares to 5,370 hectares, a net gain of about 762 hectares (+17%). New forest grew on about 840 hectares, while 78 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
In the same region
Measured cities near Yanji
Same 2 km radius, same index — so they compare directly.
- Longjing14.5 km
China
- Tree cover
- 20%
- Air quality
- 177
- Dunhua116.4 km
China
- Tree cover
- 16%
- Air quality
- 163
- Chongjin123.6 km
North Korea
- Tree cover
- 3%
- Air quality
- 62
- Mudanjiang184.8 km
China
- Tree cover
- 13%
- Air quality
- 162
- Hailin187.4 km
China
- Tree cover
- 15%
- Air quality
- 162
- Vladivostok194.3 km
Russia
- Tree cover
- 19%
- Air quality
- 55
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Frequently asked
Questions about Yanji
What is the air quality (AQI) in Yanji right now?
The latest reading for Yanji shows an AQI of 172 (Unhealthy), observed Nov 11, 03:00 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 Yanji today?
At AQI 172 (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 Yanji been like this week?
Over the last 7 days, the CAMS air-quality model put Yanji's daily AQI at 62 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 Yanji lost since 2001?
Since 2001, the area within 10 km of Yanji has lost about 155 hectares of forest (about 220 football pitches): 5.1% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 34 hectares (22%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Yanji grew from about 4,610 hectares to 5,370 hectares, a net gain of about 762 hectares (+17%). New forest grew on about 840 hectares, while 78 hectares were lost.
What is the tree count in Yanji?
Yanji has an estimated 17,274 trees across the 11.92 km² of land measured — 5.8% tree cover, 34 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Yanji need?
Yanji needs roughly 101,855 more trees to close a 34-point shortfall against its 40% tree-cover target — about 2,241 t of extra CO₂ absorbed per year once grown.
How are Yanji'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 Yanji; the tree count is an estimate derived from that cover.
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