City report · South Hwanghae, North Korea
Ŭllyul Air quality today
Air quality in Ŭllyul currently reads AQI 51 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 51
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 8.6
- tree cover
- 5.6%
- trees in this area
- 17.6K
- more trees needed
- 76.7K
Measured across a 2 km radius around Unryul-ŭp, South Hwanghae, North Korea (12.57 km²), from a satellite image of Sep 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Ŭllyul · AQI 51 (Moderate)
Ŭllyul's tree count comes to 17,593 trees across 12.57 km², 24 points below the 30% tree-cover level considered healthy for this area, so roughly 76,655 more trees would close the gap.
Air quality detail
Air quality in Ŭllyul today: AQI 51, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 13:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 185 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 185 km, e.g. Kaesŏng and Gimpo-si
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
8.6
PM10
21.5
NO₂
9.9
O₃
59.0
SO₂
9.6
CO
333.0
- 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 Ŭllyul's daily AQI at 53 on average, from 30 on Nov 8 to an hourly peak of 109 on Nov 5.
Where Ŭllyul stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Ŭllyul: Critically low
5.6% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
17,593
Target trees
94,248
More trees needed
76,655
CO₂ if planted / yr
1,686 t
Deforestation · 2001–2025
How much forest has Ŭllyul lost?
Since 2001, the area within 10 km of Ŭllyul has lost about 243 hectares of forest (about 340 football pitches): 4.1% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 3 hectares (1.1%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from June 2017 of a 5 × 5 km area about 5 km east of the city center.
- Forest lost since 2001
- 243 haabout 340 football pitches
- Share of its forest
- 4.1%of what there was in 2000
- Cleared for good
- 3 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 57 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 | under 1 ha | 17 ha | 17 ha |
| 2002 | under 1 ha | 8 ha | 8 ha |
| 2003 | under 1 ha | 8 ha | 8 ha |
| 2004 | under 1 ha | 3 ha | 3 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 1 ha | 25 ha | 26 ha |
| 2007 | under 1 ha | under 1 ha | 1 ha |
| 2008 | under 1 ha | 2 ha | 2 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | 57 ha | 57 ha |
| 2011 | under 1 ha | 7 ha | 7 ha |
| 2012 | under 1 ha | 8 ha | 9 ha |
| 2013 | under 1 ha | 3 ha | 3 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | 1 ha | 1 ha |
| 2016 | under 1 ha | 40 ha | 40 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | 2 ha | 2 ha |
| 2019 | under 1 ha | 1 ha | 1 ha |
| 2020 | under 1 ha | 19 ha | 19 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 | under 1 ha | 38 ha | 38 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Ŭllyul?
- Loggingcan grow back77% · 187 ha
- Wildfirescan grow back20% · 48 ha
- Unknown causescause unknown2.3% · 6 ha
Also: towns and roads, 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
- 9,000 ha
- Forest in 2020
- 10,700 ha
- Overall change
- +1,720 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Ŭllyul grew from about 9,000 hectares to 10,700 hectares, a net gain of about 1,720 hectares (+19%). New forest grew on about 1,800 hectares, while 79 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 Ŭllyul
Same 2 km radius, same index — so they compare directly.
- Chaeryŏng-ni24.9 km
North Korea
- Tree cover
- 16%
- Air quality
- 161
- Namp’o31.3 km
North Korea
- Tree cover
- 7%
- Air quality
- 65
- Sinch’ŏn-ŭp31.3 km
North Korea
- Tree cover
- 4%
- Air quality
- 52
- Songnim-ni48.0 km
North Korea
- Tree cover
- 23%
- Air quality
- 52
- Sariwŏn-si49.3 km
North Korea
- Tree cover
- 8%
- Air quality
- 52
- Kangsŏn58.0 km
North Korea
- Tree cover
- 33%
- Air quality
- 72
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Frequently asked
Questions about Ŭllyul
What is the air quality (AQI) in Ŭllyul right now?
The latest reading for Ŭllyul shows an AQI of 51 (Moderate), observed Nov 11, 13:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 185 km, 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 Ŭllyul today?
At AQI 51 (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 Ŭllyul been like this week?
Over the last 7 days, the CAMS air-quality model put Ŭllyul's daily AQI at 53 on average, from 30 on Nov 8 to an hourly peak of 109 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 Ŭllyul lost since 2001?
Since 2001, the area within 10 km of Ŭllyul has lost about 243 hectares of forest (about 340 football pitches): 4.1% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 3 hectares (1.1%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Ŭllyul grew from about 9,000 hectares to 10,700 hectares, a net gain of about 1,720 hectares (+19%). New forest grew on about 1,800 hectares, while 79 hectares were lost.
What is the tree count in Ŭllyul?
Ŭllyul has an estimated 17,593 trees across the 12.57 km² measured — 5.6% tree cover, 24 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Ŭllyul need?
Ŭllyul needs roughly 76,655 more trees to close a 24-point shortfall against its 30% tree-cover target — about 1,686 t of extra CO₂ absorbed per year once grown.
How are Ŭllyul'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 Unryul-ŭp; the tree count is an estimate derived from that cover.
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