City report · Yamaguchi, Japan
Iwakuni Air quality today
Air quality in Iwakuni currently reads AQI 12 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 12
Good
- PM2.5, fine particles (µg/m³)
- 1.9
- tree cover
- 17.1%
- trees in this area
- 50.0K
- more trees needed
- 37.7K
Measured across a 2 km radius around 3 Chome-19 Imazumachi, Iwakuni, Yamaguchi 740-0017, Japan (12.57 km²), from a satellite image of Sep 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Iwakuni · AQI 12 (Good)
Iwakuni's tree count comes to 50,014 trees across 11.7 km² of land, 13 points below the 30% tree-cover level considered healthy for this area, so roughly 37,730 more trees would close the gap.
Air quality detail
Air quality in Iwakuni today: AQI 12, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 185 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 185 km, e.g. Kasuga and Fukuoka
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.9
PM10
10.5
NO₂
9.3
O₃
78.0
SO₂
5.5
CO
176.0
- 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 Iwakuni's daily AQI at 40 on average, from 24 on Nov 10 to an hourly peak of 73 on Nov 6.
Where Iwakuni stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Iwakuni: Critically low
17.1% tree cover against a 30% healthy-neighborhood target, across 11.7 km² of land.
Trees in this area
50,014
Target trees
87,744
More trees needed
37,730
CO₂ if planted / yr
830.1 t
Deforestation · 2001–2025
How much forest has Iwakuni lost?
Since 2001, the area within 10 km of Iwakuni has lost about 175 hectares of forest (about 240 football pitches): 1.5% of the forest it had in 2000. Most of it (64%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 175 haabout 240 football pitches
- Share of its forest
- 1.5%of what there was in 2000
- Cleared for good
- 112 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 33 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 | 28 ha | 5 ha | 33 ha |
| 2002 | 15 ha | 10 ha | 25 ha |
| 2003 | 6 ha | 2 ha | 8 ha |
| 2004 | 5 ha | 3 ha | 8 ha |
| 2005 | 6 ha | 7 ha | 13 ha |
| 2006 | 16 ha | 3 ha | 20 ha |
| 2007 | 4 ha | 4 ha | 8 ha |
| 2008 | 1 ha | under 1 ha | 1 ha |
| 2009 | 4 ha | 3 ha | 7 ha |
| 2010 | 2 ha | 3 ha | 5 ha |
| 2011 | 2 ha | 2 ha | 5 ha |
| 2012 | under 1 ha | under 1 ha | under 1 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 | 2 ha | 3 ha |
| 2016 | 5 ha | 9 ha | 14 ha |
| 2017 | 1 ha | under 1 ha | 2 ha |
| 2018 | 3 ha | 2 ha | 5 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | 3 ha | under 1 ha | 3 ha |
| 2021 | 2 ha | 1 ha | 3 ha |
| 2022 | 2 ha | under 1 ha | 2 ha |
| 2023 | 4 ha | under 1 ha | 4 ha |
| 2024 | 3 ha | 1 ha | 4 ha |
| 2025 | under 1 ha | 2 ha | 2 ha |
What is causing deforestation around Iwakuni?
- Towns and roadscleared for good59% · 103 ha
- Loggingcan grow back27% · 46 ha
- Mining and energycleared for good5% · 9 ha
Also: 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
- 12,000 ha
- Forest in 2020
- 12,000 ha
- Overall change
- −60 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Iwakuni stayed about the same size, at about 12,000 hectares: new forest grew on about 51 hectares, and about 111 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 Iwakuni
Same 2 km radius, same index — so they compare directly.
- Hatsukaichi23.3 km
Japan
- Tree cover
- 13%
- Air quality
- 38
- Kure32.8 km
Japan
- Tree cover
- 61%
- Air quality
- 38
- Hiroshima33.8 km
Japan
- Tree cover
- 13%
- Air quality
- 38
- Shūnan39.9 km
Japan
- Tree cover
- 13%
- Air quality
- 11
- Higashihiroshima54.8 km
Japan
- Tree cover
- 32%
- Air quality
- 38
- Hōfu61.4 km
Japan
- Tree cover
- 7%
- Air quality
- 12
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Frequently asked
Questions about Iwakuni
What is the air quality (AQI) in Iwakuni right now?
The latest reading for Iwakuni shows an AQI of 12 (Good), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 185 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Iwakuni today?
At AQI 12 (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 Iwakuni been like this week?
Over the last 7 days, the CAMS air-quality model put Iwakuni's daily AQI at 40 on average, from 24 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 Iwakuni lost since 2001?
Since 2001, the area within 10 km of Iwakuni has lost about 175 hectares of forest (about 240 football pitches): 1.5% of the forest it had in 2000. Most of it (64%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Iwakuni stayed about the same size, at about 12,000 hectares: new forest grew on about 51 hectares, and about 111 hectares were lost.
What is the tree count in Iwakuni?
Iwakuni has an estimated 50,014 trees across the 11.7 km² of land measured — 17.1% tree cover, 13 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Iwakuni need?
Iwakuni needs roughly 37,730 more trees to close a 13-point shortfall against its 30% tree-cover target — about 830.1 t of extra CO₂ absorbed per year once grown.
How are Iwakuni'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 3 Chome-19 Imazumachi; the tree count is an estimate derived from that cover.
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