City report · Gyeonggi-do, South Korea
Goyang-si Air quality today
Air quality in Goyang-si currently reads AQI 101 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 101
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 35.5
- tree cover
- 46.4%
- trees in this area
- 146K
- more trees needed
- 0
Measured across a 2 km radius around South Korea, 경기도 고양시 덕양구 성사1동 (12.57 km²), from a satellite image of Sep 23, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Goyang-si · AQI 101 (Unhealthy for sensitive groups)
Goyang-si's tree count comes to 145,770 trees across 12.57 km², already at or above the 35% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Goyang-si today: AQI 101, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 12, 02:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 백마로(마두역), 5.2 km away · median of 6 stations
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
35.5
PM10
52.0
NO₂
32.2
O₃
30.2
SO₂
6.3
CO
423.9
Data: OpenAQ · Korea Air Ministry of Environment, Korea Environment Corporation · AirKorea
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Goyang-si's daily AQI at 76 on average, from 52 on Nov 6 to an hourly peak of 163 on Nov 4.
Where Goyang-si stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Goyang-si: Healthy tree cover
46.4% tree cover against a 35% healthy-neighborhood target, across 12.57 km².
Trees in this area
145,770
Target trees
145,770
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Goyang-si lost?
Since 2001, the area within 10 km of Goyang-si has lost about 168 hectares of forest (about 240 football pitches): 4.3% of the forest it had in 2000. Most of it (80%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area about 5 km northeast of the city center.
- Forest lost since 2001
- 168 haabout 240 football pitches
- Share of its forest
- 4.3%of what there was in 2000
- Cleared for good
- 135 hadeforestation: turned into farms, mines or towns
The worst year was 2017, when about 17 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 | 2 ha | under 1 ha | 2 ha |
| 2002 | 12 ha | under 1 ha | 12 ha |
| 2003 | 4 ha | under 1 ha | 4 ha |
| 2004 | 2 ha | under 1 ha | 2 ha |
| 2005 | 4 ha | under 1 ha | 4 ha |
| 2006 | 3 ha | under 1 ha | 3 ha |
| 2007 | 3 ha | under 1 ha | 3 ha |
| 2008 | 6 ha | under 1 ha | 6 ha |
| 2009 | 3 ha | under 1 ha | 4 ha |
| 2010 | 9 ha | under 1 ha | 10 ha |
| 2011 | 4 ha | 1 ha | 6 ha |
| 2012 | 7 ha | under 1 ha | 8 ha |
| 2013 | 6 ha | under 1 ha | 6 ha |
| 2014 | 2 ha | under 1 ha | 3 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 5 ha | under 1 ha | 5 ha |
| 2017 | 13 ha | 4 ha | 17 ha |
| 2018 | 12 ha | 2 ha | 14 ha |
| 2019 | 4 ha | under 1 ha | 4 ha |
| 2020 | 10 ha | 4 ha | 15 ha |
| 2021 | 2 ha | 4 ha | 6 ha |
| 2022 | 5 ha | 9 ha | 13 ha |
| 2023 | 9 ha | 2 ha | 10 ha |
| 2024 | 4 ha | under 1 ha | 5 ha |
| 2025 | 5 ha | 4 ha | 9 ha |
What is causing deforestation around Goyang-si?
- Towns and roadscleared for good80% · 135 ha
- Loggingcan grow back17% · 29 ha
- Unknown causescause unknown2.4% · 4 ha
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
- 6,220 ha
- Forest in 2020
- 6,080 ha
- Overall change
- −137 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Goyang-si shrank from about 6,220 hectares to 6,080 hectares, a net loss of about 137 hectares (−2.2%). New forest grew on about 114 hectares, but 251 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 Goyang-si
Same 2 km radius, same index — so they compare directly.
- Seoul16.1 km
South Korea
- Tree cover
- 20%
- Air quality
- 94
- Bucheon-si18.1 km
South Korea
- Tree cover
- 27%
- Air quality
- 99
- Uijeongbu-si20.9 km
South Korea
- Tree cover
- 23%
- Air quality
- 81
- Incheon25.0 km
South Korea
- Tree cover
- 12%
- Air quality
- 88
- Guri-si27.6 km
South Korea
- Tree cover
- 31%
- Air quality
- 84
- Yangju28.0 km
South Korea
- Tree cover
- 33%
- Air quality
- 81
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Frequently asked
Questions about Goyang-si
What is the air quality (AQI) in Goyang-si right now?
The latest reading for Goyang-si shows an AQI of 101 (Unhealthy for sensitive groups), measured Nov 12, 02:00 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 백마로(마두역), 5.2 km away). The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Goyang-si today?
At AQI 101 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Goyang-si been like this week?
Over the last 7 days, the CAMS air-quality model put Goyang-si's daily AQI at 76 on average, from 52 on Nov 6 to an hourly peak of 163 on Nov 4. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Goyang-si lost since 2001?
Since 2001, the area within 10 km of Goyang-si has lost about 168 hectares of forest (about 240 football pitches): 4.3% of the forest it had in 2000. Most of it (80%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Goyang-si shrank from about 6,220 hectares to 6,080 hectares, a net loss of about 137 hectares (−2.2%). New forest grew on about 114 hectares, but 251 hectares were lost.
What is the tree count in Goyang-si?
Goyang-si has an estimated 145,770 trees across the 12.57 km² measured — 46.4% tree cover, already past the 35% tree-cover target set for this area.
How many more trees does Goyang-si need?
Goyang-si has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Goyang-si's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near South Korea, 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 South Korea; the tree count is an estimate derived from that cover.
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