City report · Gyeongsangnam-do, South Korea
Changwon Air quality today
Air quality in Changwon currently reads AQI 66 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 66
Moderate
- PM2.5, fine particles (µg/m³)
- 17.0
- tree cover
- 32.1%
- trees in this area
- 101K
- more trees needed
- 0
Measured across a 2 km radius around Yongji-ro, Seongsan-gu, Changwon-si, Gyeongsangnam-do, South Korea (12.57 km²), from a satellite image of Sep 12, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Changwon · AQI 66 (Moderate)
Changwon's tree count comes to 100,543 trees across 12.53 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Changwon today: AQI 66, 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 · 용지동, 900 m away · median of 11 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
17.0
PM10
30.0
NO₂
52.9
O₃
17.5
SO₂
7.3
CO
618.6
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 Changwon's daily AQI at 52 on average, from 41 on Nov 10 to an hourly peak of 89 on Nov 5.
Where Changwon stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Changwon: Healthy tree cover
32.1% tree cover against a 30% healthy-neighborhood target, across 12.53 km² of land.
Trees in this area
100,543
Target trees
100,543
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Changwon lost?
Since 2001, the area within 10 km of Changwon has lost about 440 hectares of forest (about 620 football pitches): 3.1% 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 July 2017 of a 5 × 5 km area about 7 km east of the city center.
- Forest lost since 2001
- 440 haabout 620 football pitches
- Share of its forest
- 3.1%of what there was in 2000
- Cleared for good
- 360 hadeforestation: turned into farms, mines or towns
The worst year was 2007, when about 52 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 | 8 ha | under 1 ha | 9 ha |
| 2002 | 5 ha | 1 ha | 6 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 9 ha | 2 ha | 11 ha |
| 2005 | 10 ha | 1 ha | 11 ha |
| 2006 | 43 ha | under 1 ha | 43 ha |
| 2007 | 51 ha | under 1 ha | 52 ha |
| 2008 | 7 ha | under 1 ha | 7 ha |
| 2009 | 34 ha | 2 ha | 36 ha |
| 2010 | 35 ha | 7 ha | 42 ha |
| 2011 | 3 ha | 3 ha | 6 ha |
| 2012 | 32 ha | 2 ha | 34 ha |
| 2013 | 4 ha | under 1 ha | 4 ha |
| 2014 | 12 ha | under 1 ha | 12 ha |
| 2015 | 9 ha | 5 ha | 14 ha |
| 2016 | 7 ha | 1 ha | 8 ha |
| 2017 | 10 ha | under 1 ha | 10 ha |
| 2018 | 3 ha | under 1 ha | 3 ha |
| 2019 | 26 ha | under 1 ha | 26 ha |
| 2020 | 11 ha | under 1 ha | 11 ha |
| 2021 | 12 ha | under 1 ha | 12 ha |
| 2022 | 15 ha | 1 ha | 16 ha |
| 2023 | 8 ha | 3 ha | 11 ha |
| 2024 | 3 ha | 27 ha | 29 ha |
| 2025 | 4 ha | 23 ha | 27 ha |
What is causing deforestation around Changwon?
- Towns and roadscleared for good81% · 355 ha
- Loggingcan grow back16% · 71 ha
- Unknown causescause unknown2.2% · 10 ha
Also: 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
- 15,700 ha
- Forest in 2020
- 15,700 ha
- Overall change
- −21 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Changwon stayed about the same size, at about 15,700 hectares: new forest grew on about 321 hectares, and about 342 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
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Frequently asked
Questions about Changwon
What is the air quality (AQI) in Changwon right now?
The latest reading for Changwon shows an AQI of 66 (Moderate), measured Nov 12, 00:00 local time by 11 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 용지동, 900 m away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Changwon today?
At AQI 66 (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 Changwon been like this week?
Over the last 7 days, the CAMS air-quality model put Changwon's daily AQI at 52 on average, from 41 on Nov 10 to an hourly peak of 89 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 Changwon lost since 2001?
Since 2001, the area within 10 km of Changwon has lost about 440 hectares of forest (about 620 football pitches): 3.1% 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 Changwon stayed about the same size, at about 15,700 hectares: new forest grew on about 321 hectares, and about 342 hectares were lost.
What is the tree count in Changwon?
Changwon has an estimated 100,543 trees across the 12.53 km² of land measured — 32.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Changwon need?
Changwon has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Changwon's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Yongji-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 Yongji-ro; the tree count is an estimate derived from that cover.
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