City report · North Korea
Chongjin Air quality today
Air quality in Chongjin currently reads AQI 62 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 62
Moderate
- PM2.5, fine particles (µg/m³)
- 16.1
- tree cover
- 3.3%
- trees in this area
- 10.1K
- more trees needed
- 82.0K
Measured across a 2 km radius around Chongjin, North Hamgyong, North Korea (12.57 km²), from a satellite image of Sep 20, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Chongjin · AQI 62 (Moderate)
Chongjin's tree count comes to 10,139 trees across 12.29 km² of land, 27 points below the 30% tree-cover level considered healthy for this area, so roughly 82,035 more trees would close the gap.
Air quality detail
Air quality in Chongjin today: AQI 62, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 18:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
16.1
PM10
22.2
NO₂
8.9
O₃
72.0
SO₂
7.6
CO
511.0
- 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 Chongjin's daily AQI at 50 on average, from 25 on Nov 7 to an hourly peak of 110 on Nov 5.
Where Chongjin stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Chongjin: Critically low
3.3% tree cover against a 30% healthy-neighborhood target, across 12.29 km² of land.
Trees in this area
10,139
Target trees
92,174
More trees needed
82,035
CO₂ if planted / yr
1,805 t
Deforestation · 2001–2025
How much forest has Chongjin lost?
Since 2001, the area within 10 km of Chongjin has lost about 72 hectares of forest (about 100 football pitches): 3.7% of the forest it had in 2000. Most of it was lost to wildfires, so much of it can grow back. About 4 hectares (6.1%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 72 haabout 100 football pitches
- Share of its forest
- 3.7%of what there was in 2000
- Cleared for good
- 4 hadeforestation: turned into farms, mines or towns
The worst year was 2004, when about 19 hectares of forest were lost, mostly to wildfires.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | 2 ha | 2 ha |
| 2002 | under 1 ha | 1 ha | 1 ha |
| 2003 | under 1 ha | 3 ha | 3 ha |
| 2004 | under 1 ha | 18 ha | 19 ha |
| 2005 | under 1 ha | 8 ha | 9 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | 6 ha | 6 ha |
| 2008 | under 1 ha | 9 ha | 9 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | 2 ha | 2 ha |
| 2011 | under 1 ha | 16 ha | 16 ha |
| 2012 | under 1 ha | 2 ha | 2 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 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 | 1 ha | under 1 ha | 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Chongjin?
- Wildfirescan grow back54% · 39 ha
- Loggingcan grow back33% · 24 ha
- Farms, pasture and plantationscleared for good3.9% · 3 ha
Also: mining and energy, towns and roads, 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
- 4,220 ha
- Forest in 2020
- 4,740 ha
- Overall change
- +519 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Chongjin grew from about 4,220 hectares to 4,740 hectares, a net gain of about 519 hectares (+12%). New forest grew on about 707 hectares, while 189 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 Chongjin
Same 2 km radius, same index — so they compare directly.
- Longjing112.3 km
China
- Tree cover
- 20%
- Air quality
- 177
- Yanji123.6 km
China
- Tree cover
- 6%
- Air quality
- 172
- Hyesan139.9 km
North Korea
- Tree cover
- 14%
- Air quality
- 96
- Changam-ch’on156.2 km
North Korea
- Tree cover
- 61%
- Air quality
- 56
- Dunhua216.0 km
China
- Tree cover
- 16%
- Air quality
- 163
- Vladivostok225.5 km
Russia
- Tree cover
- 19%
- Air quality
- 55
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Frequently asked
Questions about Chongjin
What is the air quality (AQI) in Chongjin right now?
The latest reading for Chongjin shows an AQI of 62 (Moderate), observed Nov 11, 18:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Chongjin today?
At AQI 62 (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 Chongjin been like this week?
Over the last 7 days, the CAMS air-quality model put Chongjin's daily AQI at 50 on average, from 25 on Nov 7 to an hourly peak of 110 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 Chongjin lost since 2001?
Since 2001, the area within 10 km of Chongjin has lost about 72 hectares of forest (about 100 football pitches): 3.7% of the forest it had in 2000. Most of it was lost to wildfires, so much of it can grow back. About 4 hectares (6.1%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Chongjin grew from about 4,220 hectares to 4,740 hectares, a net gain of about 519 hectares (+12%). New forest grew on about 707 hectares, while 189 hectares were lost.
What is the tree count in Chongjin?
Chongjin has an estimated 10,139 trees across the 12.29 km² of land measured — 3.3% tree cover, 27 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Chongjin need?
Chongjin needs roughly 82,035 more trees to close a 27-point shortfall against its 30% tree-cover target — about 1,805 t of extra CO₂ absorbed per year once grown.
How are Chongjin's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 Chongjin; the tree count is an estimate derived from that cover.
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