City report · Gyeonggi-do, South Korea
Yangju Air quality today
Air quality in Yangju currently reads AQI 73 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 73
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 21.0
- tree cover
- 33.1%
- trees in this area
- 104K
- more trees needed
- 0
Measured across a 2 km radius around Hoejeong-dong, Yangju-si, Gyeonggi-do, South Korea (12.57 km²), from a satellite image of Sep 23, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Yangju · AQI 73 (Moderate)
Yangju's tree count comes to 103,987 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Yangju today: AQI 73, Moderate
Main pollutant: PM2.5 · Observed Nov 12, 01:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 백석읍, 8 km away · median of 5 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
21.0
PM10
40.5
NO₂
26.7
O₃
2.0
SO₂
6.0
CO
687.4
Data: OpenAQ · Korea Air Ministry of Environment, Korea Environment Corporation · AirKorea
- 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 Yangju's daily AQI at 61 on average, from 41 on Nov 9 to an hourly peak of 110 on Nov 5.
Where Yangju stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Yangju: Healthy tree cover
33.1% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
103,987
Target trees
103,987
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Yangju lost?
Since 2001, the area within 10 km of Yangju has lost about 809 hectares of forest (about 1,100 football pitches): 8.3% of the forest it had in 2000. Most of it (82%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area about 4 km northwest of the city center.
- Forest lost since 2001
- 809 haabout 1,100 football pitches
- Share of its forest
- 8.3%of what there was in 2000
- Cleared for good
- 663 hadeforestation: turned into farms, mines or towns
The worst year was 2009, when about 48 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 | 11 ha | under 1 ha | 11 ha |
| 2002 | 16 ha | 3 ha | 18 ha |
| 2003 | 25 ha | 4 ha | 29 ha |
| 2004 | 6 ha | under 1 ha | 7 ha |
| 2005 | 36 ha | 4 ha | 40 ha |
| 2006 | 31 ha | 4 ha | 35 ha |
| 2007 | 14 ha | under 1 ha | 14 ha |
| 2008 | 29 ha | 5 ha | 34 ha |
| 2009 | 44 ha | 4 ha | 48 ha |
| 2010 | 24 ha | 8 ha | 32 ha |
| 2011 | 35 ha | 9 ha | 44 ha |
| 2012 | 32 ha | 6 ha | 39 ha |
| 2013 | 27 ha | 5 ha | 32 ha |
| 2014 | 31 ha | 6 ha | 37 ha |
| 2015 | 25 ha | 12 ha | 37 ha |
| 2016 | 29 ha | 6 ha | 34 ha |
| 2017 | 28 ha | 14 ha | 42 ha |
| 2018 | 25 ha | 4 ha | 29 ha |
| 2019 | 13 ha | 1 ha | 14 ha |
| 2020 | 40 ha | 4 ha | 44 ha |
| 2021 | 19 ha | 9 ha | 28 ha |
| 2022 | 32 ha | 8 ha | 40 ha |
| 2023 | 43 ha | 4 ha | 47 ha |
| 2024 | 34 ha | 8 ha | 41 ha |
| 2025 | 17 ha | 17 ha | 34 ha |
What is causing deforestation around Yangju?
- Towns and roadscleared for good81% · 654 ha
- Loggingcan grow back17% · 134 ha
- Unknown causescause unknown1.5% · 12 ha
Also: farms, pasture and plantations, mining and energy.
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
- 12,300 ha
- Forest in 2020
- 11,700 ha
- Overall change
- −568 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Yangju shrank from about 12,300 hectares to 11,700 hectares, a net loss of about 568 hectares (−4.6%). New forest grew on about 231 hectares, but 799 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 Yangju
Same 2 km radius, same index — so they compare directly.
- Guri-si27.0 km
South Korea
- Tree cover
- 31%
- Air quality
- 84
- Goyang-si28.0 km
South Korea
- Tree cover
- 46%
- Air quality
- 97
- Hwado29.5 km
South Korea
- Tree cover
- 53%
- Air quality
- 84
- Seoul30.6 km
South Korea
- Tree cover
- 20%
- Air quality
- 90
- Hanam35.0 km
South Korea
- Tree cover
- 30%
- Air quality
- 88
- Gimpo-si38.4 km
South Korea
- Tree cover
- 22%
- Air quality
- 97
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Frequently asked
Questions about Yangju
What is the air quality (AQI) in Yangju right now?
The latest reading for Yangju shows an AQI of 73 (Moderate), measured Nov 12, 01:00 local time by 5 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 백석읍, 8 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Yangju today?
At AQI 73 (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 Yangju been like this week?
Over the last 7 days, the CAMS air-quality model put Yangju's daily AQI at 61 on average, from 41 on Nov 9 to an hourly peak of 110 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 Yangju lost since 2001?
Since 2001, the area within 10 km of Yangju has lost about 809 hectares of forest (about 1,100 football pitches): 8.3% of the forest it had in 2000. Most of it (82%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Yangju shrank from about 12,300 hectares to 11,700 hectares, a net loss of about 568 hectares (−4.6%). New forest grew on about 231 hectares, but 799 hectares were lost.
What is the tree count in Yangju?
Yangju has an estimated 103,987 trees across the 12.57 km² measured — 33.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Yangju need?
Yangju has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Yangju's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Hoejeong-dong, 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 Hoejeong-dong; the tree count is an estimate derived from that cover.
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