City report · Ishikawa, Japan
Komatsu Air quality today
Air quality in Komatsu currently reads AQI 6 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 6
Good
- PM2.5, fine particles (µg/m³)
- 1.1
- tree cover
- 2.2%
- trees in this area
- 6.9K
- more trees needed
- 86.7K
Measured across a 2 km radius around Higashicho, Komatsu, Ishikawa 923-0923, Japan (12.57 km²), from a satellite image of Sep 1, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Komatsu · AQI 6 (Good)
Komatsu's tree count comes to 6,863 trees across 12.48 km² of land, 28 points below the 30% tree-cover level considered healthy for this area, so roughly 86,725 more trees would close the gap.
Air quality detail
Air quality in Komatsu today: AQI 6, Good
Main pollutant: PM2.5 · Observed Nov 11, 12:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.1
PM10
1.5
NO₂
1.7
O₃
92.0
SO₂
1.8
CO
128.0
- 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 Komatsu's daily AQI at 35 on average, from 15 on Nov 11 to an hourly peak of 68 on Nov 6.
Where Komatsu stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Komatsu: Critically low
2.2% tree cover against a 30% healthy-neighborhood target, across 12.48 km² of land.
Trees in this area
6,863
Target trees
93,588
More trees needed
86,725
CO₂ if planted / yr
1,908 t
Deforestation · 2001–2025
How much forest has Komatsu lost?
Since 2001, the area within 10 km of Komatsu has lost about 180 hectares of forest (about 250 football pitches): 2.5% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 62 hectares (35%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 180 haabout 250 football pitches
- Share of its forest
- 2.5%of what there was in 2000
- Cleared for good
- 62 hadeforestation: turned into farms, mines or towns
The worst year was 2017, when about 20 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 | 5 ha |
| 2002 | 2 ha | 3 ha | 5 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 8 ha | 3 ha | 11 ha |
| 2005 | 3 ha | 3 ha | 5 ha |
| 2006 | 3 ha | 2 ha | 5 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | 7 ha | 4 ha | 11 ha |
| 2009 | 1 ha | 3 ha | 4 ha |
| 2010 | 4 ha | 4 ha | 8 ha |
| 2011 | 2 ha | under 1 ha | 3 ha |
| 2012 | 4 ha | 8 ha | 11 ha |
| 2013 | under 1 ha | 3 ha | 4 ha |
| 2014 | 3 ha | 1 ha | 4 ha |
| 2015 | under 1 ha | 4 ha | 5 ha |
| 2016 | 4 ha | 8 ha | 12 ha |
| 2017 | 12 ha | 8 ha | 20 ha |
| 2018 | 2 ha | 5 ha | 7 ha |
| 2019 | under 1 ha | 8 ha | 9 ha |
| 2020 | under 1 ha | 7 ha | 8 ha |
| 2021 | 1 ha | 6 ha | 7 ha |
| 2022 | 1 ha | 12 ha | 13 ha |
| 2023 | 2 ha | 6 ha | 7 ha |
| 2024 | under 1 ha | 7 ha | 8 ha |
| 2025 | under 1 ha | 8 ha | 9 ha |
What is causing deforestation around Komatsu?
- Loggingcan grow back55% · 98 ha
- Towns and roadscleared for good31% · 56 ha
- Farms, pasture and plantationscleared for good3.5% · 6 ha
Also: 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
- 7,160 ha
- Forest in 2020
- 7,140 ha
- Overall change
- −12 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Komatsu stayed about the same size, at about 7,140 hectares: new forest grew on about 95 hectares, and about 106 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 Komatsu
What is the air quality (AQI) in Komatsu right now?
The latest reading for Komatsu shows an AQI of 6 (Good), observed Nov 11, 12:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Komatsu today?
At AQI 6 (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 Komatsu been like this week?
Over the last 7 days, the CAMS air-quality model put Komatsu's daily AQI at 35 on average, from 15 on Nov 11 to an hourly peak of 68 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 Komatsu lost since 2001?
Since 2001, the area within 10 km of Komatsu has lost about 180 hectares of forest (about 250 football pitches): 2.5% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 62 hectares (35%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Komatsu stayed about the same size, at about 7,140 hectares: new forest grew on about 95 hectares, and about 106 hectares were lost.
What is the tree count in Komatsu?
Komatsu has an estimated 6,863 trees across the 12.48 km² of land measured — 2.2% tree cover, 28 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Komatsu need?
Komatsu needs roughly 86,725 more trees to close a 28-point shortfall against its 30% tree-cover target — about 1,908 t of extra CO₂ absorbed per year once grown.
How are Komatsu'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 Higashicho; the tree count is an estimate derived from that cover.
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