City report · South Korea
Daejeon Air quality today
Air quality in Daejeon currently reads AQI 75 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 75
Moderate
- PM2.5, fine particles (µg/m³)
- 22.0
- tree cover
- 13.6%
- trees in this area
- 42.5K
- more trees needed
- 51.3K
Measured across a 2 km radius around Dunsannam-ro, Seo-gu, Daejeon, South Korea (12.57 km²), from a satellite image of Sep 8, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Daejeon · AQI 75 (Moderate)
Daejeon's tree count comes to 42,512 trees across 12.51 km² of land, 16 points below the 30% tree-cover level considered healthy for this area, so roughly 51,265 more trees would close the gap.
Air quality detail
Air quality in Daejeon today: AQI 75, 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 · 둔산동, 600 m away · median of 14 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
22.0
PM10
31.5
NO₂
54.6
O₃
4.7
SO₂
5.8
CO
521.2
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 Daejeon's daily AQI at 63 on average, from 47 on Nov 6 to an hourly peak of 93 on Nov 11.
Where Daejeon stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Daejeon: Critically low
13.6% tree cover against a 30% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
42,512
Target trees
93,777
More trees needed
51,265
CO₂ if planted / yr
1,128 t
Deforestation · 2001–2025
How much forest has Daejeon lost?
Since 2001, the area within 10 km of Daejeon has lost about 191 hectares of forest (about 270 football pitches): 2.2% of the forest it had in 2000. Most of it (63%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 191 haabout 270 football pitches
- Share of its forest
- 2.2%of what there was in 2000
- Cleared for good
- 121 hadeforestation: turned into farms, mines or towns
The worst year was 2020, when about 23 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 | 5 ha | under 1 ha | 5 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | 2 ha | under 1 ha | 2 ha |
| 2004 | 7 ha | 3 ha | 10 ha |
| 2005 | 3 ha | under 1 ha | 3 ha |
| 2006 | 2 ha | under 1 ha | 3 ha |
| 2007 | 3 ha | 2 ha | 5 ha |
| 2008 | 13 ha | under 1 ha | 13 ha |
| 2009 | 10 ha | under 1 ha | 10 ha |
| 2010 | 3 ha | under 1 ha | 4 ha |
| 2011 | 2 ha | under 1 ha | 2 ha |
| 2012 | 11 ha | under 1 ha | 12 ha |
| 2013 | 2 ha | 1 ha | 3 ha |
| 2014 | 2 ha | under 1 ha | 3 ha |
| 2015 | 6 ha | 2 ha | 9 ha |
| 2016 | 6 ha | 7 ha | 13 ha |
| 2017 | 16 ha | 3 ha | 18 ha |
| 2018 | 3 ha | 7 ha | 10 ha |
| 2019 | 2 ha | 1 ha | 4 ha |
| 2020 | 2 ha | 21 ha | 23 ha |
| 2021 | 3 ha | 9 ha | 13 ha |
| 2022 | 4 ha | 7 ha | 11 ha |
| 2023 | 2 ha | under 1 ha | 3 ha |
| 2024 | 8 ha | under 1 ha | 9 ha |
| 2025 | 2 ha | 2 ha | 5 ha |
What is causing deforestation around Daejeon?
- Towns and roadscleared for good62% · 118 ha
- Loggingcan grow back32% · 61 ha
- Mining and energycleared for good1.5% · 3 ha
Also: 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
- 12,500 ha
- Forest in 2020
- 12,600 ha
- Overall change
- +74 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Daejeon stayed about the same size, at about 12,600 hectares: new forest grew on about 276 hectares, and about 203 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 Daejeon
Same 2 km radius, same index — so they compare directly.
- Cheongju-si33.4 km
South Korea
- Tree cover
- 23%
- Air quality
- 115
- Cheonan54.9 km
South Korea
- Tree cover
- 13%
- Air quality
- 121
- Iksan59.4 km
South Korea
- Tree cover
- 7%
- Air quality
- 80
- Jeonju62.3 km
South Korea
- Tree cover
- 23%
- Air quality
- 79
- Sangju69.8 km
South Korea
- Tree cover
- 17%
- Air quality
- 84
Also compared:Daejeon vs SeoulDaejeon vs BusanDaejeon vs IncheonDaejeon vs Daegu
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Frequently asked
Questions about Daejeon
What is the air quality (AQI) in Daejeon right now?
The latest reading for Daejeon shows an AQI of 75 (Moderate), measured Nov 12, 00:00 local time by 14 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 둔산동, 600 m away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Daejeon today?
At AQI 75 (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 Daejeon been like this week?
Over the last 7 days, the CAMS air-quality model put Daejeon's daily AQI at 63 on average, from 47 on Nov 6 to an hourly peak of 93 on Nov 11. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Daejeon lost since 2001?
Since 2001, the area within 10 km of Daejeon has lost about 191 hectares of forest (about 270 football pitches): 2.2% of the forest it had in 2000. Most of it (63%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Daejeon stayed about the same size, at about 12,600 hectares: new forest grew on about 276 hectares, and about 203 hectares were lost.
What is the tree count in Daejeon?
Daejeon has an estimated 42,512 trees across the 12.51 km² of land measured — 13.6% tree cover, 16 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Daejeon need?
Daejeon needs roughly 51,265 more trees to close a 16-point shortfall against its 30% tree-cover target — about 1,128 t of extra CO₂ absorbed per year once grown.
How are Daejeon's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Dunsannam-ro, 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 Dunsannam-ro; the tree count is an estimate derived from that cover.
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