City report · Gyeonggi-do, South Korea
Guri-si Air quality today
Air quality in Guri-si currently reads AQI 93 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 93
Moderate
- PM2.5, fine particles (µg/m³)
- 31.5
- tree cover
- 31.4%
- trees in this area
- 98.6K
- more trees needed
- 0
Measured across a 2 km radius around Angol-ro 77beon-gil, Guri-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.
Guri-si · AQI 93 (Moderate)
Guri-si's tree count comes to 98,646 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 Guri-si today: AQI 93, Moderate
Main pollutant: PM2.5 · Observed Nov 12, 00:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 동구동, 2.2 km away · median of 17 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
31.5
PM10
48.0
NO₂
71.2
O₃
4.5
SO₂
6.7
CO
733.2
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 Guri-si's daily AQI at 82 on average, from 56 on Nov 6 to an hourly peak of 153 on Nov 11.
Where Guri-si stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Guri-si: Healthy tree cover
31.4% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
98,646
Target trees
98,646
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Guri-si lost?
Since 2001, the area within 10 km of Guri-si has lost about 217 hectares of forest (about 300 football pitches): 3.8% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 217 haabout 300 football pitches
- Share of its forest
- 3.8%of what there was in 2000
- Cleared for good
- 197 hadeforestation: turned into farms, mines or towns
The worst year was 2006, when about 29 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 | 3 ha | under 1 ha | 3 ha |
| 2003 | 2 ha | under 1 ha | 2 ha |
| 2004 | 3 ha | under 1 ha | 4 ha |
| 2005 | 6 ha | 1 ha | 7 ha |
| 2006 | 29 ha | under 1 ha | 29 ha |
| 2007 | 19 ha | 1 ha | 20 ha |
| 2008 | 13 ha | under 1 ha | 13 ha |
| 2009 | 18 ha | 2 ha | 20 ha |
| 2010 | 8 ha | under 1 ha | 8 ha |
| 2011 | 15 ha | under 1 ha | 16 ha |
| 2012 | 4 ha | under 1 ha | 5 ha |
| 2013 | 2 ha | under 1 ha | 2 ha |
| 2014 | 15 ha | under 1 ha | 15 ha |
| 2015 | 12 ha | 1 ha | 13 ha |
| 2016 | 9 ha | 2 ha | 11 ha |
| 2017 | 2 ha | under 1 ha | 2 ha |
| 2018 | 7 ha | under 1 ha | 7 ha |
| 2019 | 4 ha | under 1 ha | 4 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | 9 ha | under 1 ha | 9 ha |
| 2025 | 14 ha | 7 ha | 22 ha |
What is causing deforestation around Guri-si?
- Towns and roadscleared for good91% · 197 ha
- Loggingcan grow back2.3% · 5 ha
- Unknown causescause unknown7.1% · 15 ha
Also: farms, pasture and plantations.
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
- 7,270 ha
- Forest in 2020
- 7,270 ha
- Overall change
- +4 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Guri-si stayed about the same size, at about 7,270 hectares: new forest grew on about 239 hectares, and about 234 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 Guri-si
Same 2 km radius, same index — so they compare directly.
- Seoul14.6 km
South Korea
- Tree cover
- 20%
- Air quality
- 94
- Hwado16.0 km
South Korea
- Tree cover
- 53%
- Air quality
- 92
- Seongnam-si17.8 km
South Korea
- Tree cover
- 32%
- Air quality
- 80
- Uijeongbu-si17.8 km
South Korea
- Tree cover
- 23%
- Air quality
- 86
- Yangju27.0 km
South Korea
- Tree cover
- 33%
- Air quality
- 84
- Goyang-si27.6 km
South Korea
- Tree cover
- 46%
- Air quality
- 91
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Frequently asked
Questions about Guri-si
What is the air quality (AQI) in Guri-si right now?
The latest reading for Guri-si shows an AQI of 93 (Moderate), measured Nov 12, 00:00 local time by 17 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 동구동, 2.2 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Guri-si today?
At AQI 93 (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 Guri-si been like this week?
Over the last 7 days, the CAMS air-quality model put Guri-si's daily AQI at 82 on average, from 56 on Nov 6 to an hourly peak of 153 on Nov 11. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Guri-si lost since 2001?
Since 2001, the area within 10 km of Guri-si has lost about 217 hectares of forest (about 300 football pitches): 3.8% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Guri-si stayed about the same size, at about 7,270 hectares: new forest grew on about 239 hectares, and about 234 hectares were lost.
What is the tree count in Guri-si?
Guri-si has an estimated 98,646 trees across the 12.57 km² measured — 31.4% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Guri-si need?
Guri-si has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Guri-si's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Angol-ro 77beon-gil, 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 Angol-ro 77beon-gil; the tree count is an estimate derived from that cover.
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