City report · Yamaguchi, Japan
Shūnan Air quality today
Air quality in Shūnan currently reads AQI 11 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 11
Good
- PM2.5, fine particles (µg/m³)
- 2.3
- tree cover
- 12.8%
- trees in this area
- 33.4K
- more trees needed
- 44.8K
Measured across a 2 km radius around 1 Chome Kisandori, Shunan, Yamaguchi 745-0071, Japan (12.57 km²), from a satellite image of Aug 23, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Shūnan · AQI 11 (Good)
Shūnan's tree count comes to 33,376 trees across 10.43 km² of land, 17 points below the 30% tree-cover level considered healthy for this area, so roughly 44,849 more trees would close the gap.
Air quality detail
Air quality in Shūnan today: AQI 11, Good
Main pollutant: PM2.5 · Observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 145 km, e.g. Kasuga and Fukuoka
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.3
PM10
13.0
NO₂
6.5
O₃
84.0
SO₂
3.9
CO
138.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Shūnan's daily AQI at 34 on average, from 17 on Nov 10 to an hourly peak of 73 on Nov 6.
Where Shūnan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Shūnan: Critically low
12.8% tree cover against a 30% healthy-neighborhood target, across 10.43 km² of land.
Trees in this area
33,376
Target trees
78,225
More trees needed
44,849
CO₂ if planted / yr
986.7 t
Deforestation · 2001–2025
How much forest has Shūnan lost?
Since 2001, the area within 10 km of Shūnan has lost about 226 hectares of forest (about 320 football pitches): 1.5% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 44 hectares (19%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 226 haabout 320 football pitches
- Share of its forest
- 1.5%of what there was in 2000
- Cleared for good
- 44 hadeforestation: turned into farms, mines or towns
The worst year was 2009, when about 22 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 | 5 ha | 6 ha |
| 2002 | 4 ha | 6 ha | 10 ha |
| 2003 | under 1 ha | 4 ha | 4 ha |
| 2004 | under 1 ha | 4 ha | 4 ha |
| 2005 | 3 ha | 10 ha | 13 ha |
| 2006 | 2 ha | 4 ha | 6 ha |
| 2007 | 3 ha | 11 ha | 14 ha |
| 2008 | 4 ha | 6 ha | 10 ha |
| 2009 | 1 ha | 21 ha | 22 ha |
| 2010 | 2 ha | 9 ha | 11 ha |
| 2011 | under 1 ha | under 1 ha | 1 ha |
| 2012 | 6 ha | 14 ha | 20 ha |
| 2013 | under 1 ha | 4 ha | 4 ha |
| 2014 | under 1 ha | 9 ha | 9 ha |
| 2015 | under 1 ha | 1 ha | 1 ha |
| 2016 | under 1 ha | 10 ha | 11 ha |
| 2017 | under 1 ha | 6 ha | 7 ha |
| 2018 | under 1 ha | 2 ha | 2 ha |
| 2019 | under 1 ha | 4 ha | 4 ha |
| 2020 | 2 ha | 5 ha | 8 ha |
| 2021 | 2 ha | 2 ha | 5 ha |
| 2022 | 6 ha | 12 ha | 18 ha |
| 2023 | 1 ha | 4 ha | 5 ha |
| 2024 | under 1 ha | 19 ha | 19 ha |
| 2025 | 4 ha | 8 ha | 12 ha |
What is causing deforestation around Shūnan?
- Loggingcan grow back75% · 169 ha
- Towns and roadscleared for good9.4% · 21 ha
- Mining and energycleared for good9.1% · 21 ha
Also: farms, pasture and plantations, 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
- 16,000 ha
- Forest in 2020
- 16,100 ha
- Overall change
- +60 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Shūnan stayed about the same size, at about 16,100 hectares: new forest grew on about 99 hectares, and about 40 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 Shūnan
What is the air quality (AQI) in Shūnan right now?
The latest reading for Shūnan shows an AQI of 11 (Good), observed Nov 11, 12:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Shūnan today?
At AQI 11 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Shūnan been like this week?
Over the last 7 days, the CAMS air-quality model put Shūnan's daily AQI at 34 on average, from 17 on Nov 10 to an hourly peak of 73 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Shūnan lost since 2001?
Since 2001, the area within 10 km of Shūnan has lost about 226 hectares of forest (about 320 football pitches): 1.5% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 44 hectares (19%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Shūnan stayed about the same size, at about 16,100 hectares: new forest grew on about 99 hectares, and about 40 hectares were lost.
What is the tree count in Shūnan?
Shūnan has an estimated 33,376 trees across the 10.43 km² of land measured — 12.8% tree cover, 17 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Shūnan need?
Shūnan needs roughly 44,849 more trees to close a 17-point shortfall against its 30% tree-cover target — about 986.7 t of extra CO₂ absorbed per year once grown.
How are Shūnan'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 1 Chome Kisandori; the tree count is an estimate derived from that cover.
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