City report · Gangwon-do, South Korea
Donghae City Air quality today
Air quality in Donghae City currently reads AQI 68 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 68
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 18.0
- tree cover
- 50.1%
- trees in this area
- 122K
- more trees needed
- 0
Measured across a 2 km radius around Hyangno 2-gil, Donghae-si, Gangwon-do, South Korea (12.57 km²), from a satellite image of Sep 15, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Donghae City · AQI 68 (Moderate)
Donghae City's tree count comes to 121,665 trees across 9.72 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Donghae City today: AQI 68, 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 · 천곡동, 2.2 km away · median of 4 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
18.0
PM10
31.0
NO₂
35.1
O₃
41.0
SO₂
6.5
CO
698.8
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 Donghae City's daily AQI at 40 on average, from 26 on Nov 10 to an hourly peak of 69 on Nov 5.
Where Donghae City stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Donghae City: Healthy tree cover
50.1% tree cover against a 30% healthy-neighborhood target, across 9.72 km² of land.
Trees in this area
121,665
Target trees
121,665
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Donghae City lost?
Since 2001, the area within 10 km of Donghae City has lost about 2,950 hectares of forest (about 4,100 football pitches): 28% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 132 hectares (4.5%) 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 northwest of the city center.
- Forest lost since 2001
- 2,950 haabout 4,100 football pitches
- Share of its forest
- 28%of what there was in 2000
- Cleared for good
- 132 hadeforestation: turned into farms, mines or towns
Forest loss is speeding up: about 294 hectares a year in 2021–2025, up from 194 hectares a year in 2016–2020. The worst year was 2022, when about 857 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 | 14 ha | 73 ha | 86 ha |
| 2002 | 10 ha | 52 ha | 62 ha |
| 2003 | under 1 ha | 9 ha | 9 ha |
| 2004 | 11 ha | 31 ha | 42 ha |
| 2005 | 6 ha | 17 ha | 23 ha |
| 2006 | 3 ha | 25 ha | 28 ha |
| 2007 | under 1 ha | 20 ha | 20 ha |
| 2008 | 2 ha | 54 ha | 56 ha |
| 2009 | 3 ha | 23 ha | 26 ha |
| 2010 | 22 ha | 17 ha | 38 ha |
| 2011 | 3 ha | 25 ha | 27 ha |
| 2012 | 2 ha | 17 ha | 19 ha |
| 2013 | under 1 ha | 9 ha | 10 ha |
| 2014 | 3 ha | 42 ha | 45 ha |
| 2015 | 2 ha | 19 ha | 21 ha |
| 2016 | 6 ha | 37 ha | 43 ha |
| 2017 | 3 ha | 43 ha | 45 ha |
| 2018 | under 1 ha | 15 ha | 16 ha |
| 2019 | 6 ha | 713 ha | 718 ha |
| 2020 | 1 ha | 147 ha | 148 ha |
| 2021 | 2 ha | 69 ha | 71 ha |
| 2022 | 11 ha | 846 ha | 857 ha |
| 2023 | 10 ha | 447 ha | 457 ha |
| 2024 | 4 ha | 66 ha | 70 ha |
| 2025 | 9 ha | 7 ha | 15 ha |
What is causing deforestation around Donghae City?
- Loggingcan grow back57% · 1,680 ha
- Wildfirescan grow back39% · 1,140 ha
- Towns and roadscleared for good4.3% · 127 ha
Also: mining and energy, 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
- 10,400 ha
- Forest in 2020
- 10,200 ha
- Overall change
- −147 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Donghae City stayed about the same size, at about 10,200 hectares: new forest grew on about 1,050 hectares, and about 1,200 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 Donghae City
Same 2 km radius, same index — so they compare directly.
- Gangneung31.1 km
South Korea
- Tree cover
- 39%
- Air quality
- 69
- Wŏnju104.8 km
South Korea
- Tree cover
- 21%
- Air quality
- 82
- Andong113.9 km
South Korea
- Tree cover
- 34%
- Air quality
- 71
- Chungju121.9 km
South Korea
- Tree cover
- 6%
- Air quality
- 92
- Chuncheon126.2 km
South Korea
- Tree cover
- 16%
- Air quality
- 77
- Yeoju133.0 km
South Korea
- Tree cover
- 28%
- Air quality
- 92
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Frequently asked
Questions about Donghae City
What is the air quality (AQI) in Donghae City right now?
The latest reading for Donghae City shows an AQI of 68 (Moderate), measured Nov 12, 01:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 천곡동, 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 Donghae City today?
At AQI 68 (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 Donghae City been like this week?
Over the last 7 days, the CAMS air-quality model put Donghae City's daily AQI at 40 on average, from 26 on Nov 10 to an hourly peak of 69 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 Donghae City lost since 2001?
Since 2001, the area within 10 km of Donghae City has lost about 2,950 hectares of forest (about 4,100 football pitches): 28% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 132 hectares (4.5%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is speeding up: about 294 hectares a year in 2021–2025, up from 194 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Donghae City stayed about the same size, at about 10,200 hectares: new forest grew on about 1,050 hectares, and about 1,200 hectares were lost.
What is the tree count in Donghae City?
Donghae City has an estimated 121,665 trees across the 9.72 km² of land measured — 50.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Donghae City need?
Donghae City has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Donghae City's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Hyangno 2-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 Hyangno 2-gil; the tree count is an estimate derived from that cover.
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