City report · Fukuoka, Japan
Ōmuta Air quality today
Air quality in Ōmuta currently reads AQI 43 (Good): Air quality is satisfactory for everyone.
AQI 43
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 7.7
- tree cover
- 16.5%
- trees in this area
- 51.3K
- more trees needed
- 42.0K
Measured across a 2 km radius around Yamanouemachi, Omuta, Fukuoka 836-0833, Japan (12.57 km²), from a satellite image of Sep 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Ōmuta · AQI 43 (Good)
Ōmuta's tree count comes to 51,318 trees across 12.44 km² of land, 13 points below the 30% tree-cover level considered healthy for this area, so roughly 41,987 more trees would close the gap.
Air quality detail
Air quality in Ōmuta today: AQI 43, Good
Main pollutant: PM2.5 · Observed Nov 11, 23:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Naka, Yamaga, Kumamoto, Japan (山鹿健康センター山鹿市), 23.5 km away · median of 2 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
7.7
PM10
11.4
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Japan Atmospheric Environmental Regional Observation System (環境省大気汚染物質広域監視システム), Fukuoka Institute of Health and Environmental Sciences (福岡県保健環境研究所 )
- 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 Ōmuta's daily AQI at 49 on average, from 27 on Nov 10 to an hourly peak of 82 on Nov 11.
Where Ōmuta stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Ōmuta: Critically low
16.5% tree cover against a 30% healthy-neighborhood target, across 12.44 km² of land.
Trees in this area
51,318
Target trees
93,305
More trees needed
41,987
CO₂ if planted / yr
923.7 t
Deforestation · 2001–2025
How much forest has Ōmuta lost?
Since 2001, the area within 10 km of Ōmuta has lost about 110 hectares of forest (about 150 football pitches): 1.5% of the forest it had in 2000. Most of it (81%) 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
- 110 haabout 150 football pitches
- Share of its forest
- 1.5%of what there was in 2000
- Cleared for good
- 89 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 25 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 | 23 ha | 3 ha | 25 ha |
| 2002 | 5 ha | 1 ha | 6 ha |
| 2003 | 3 ha | under 1 ha | 3 ha |
| 2004 | 6 ha | under 1 ha | 7 ha |
| 2005 | 3 ha | under 1 ha | 3 ha |
| 2006 | 8 ha | 2 ha | 9 ha |
| 2007 | 4 ha | 5 ha | 8 ha |
| 2008 | 2 ha | 2 ha | 3 ha |
| 2009 | 3 ha | under 1 ha | 4 ha |
| 2010 | 2 ha | under 1 ha | 3 ha |
| 2011 | 4 ha | 1 ha | 5 ha |
| 2012 | under 1 ha | under 1 ha | 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | 3 ha | under 1 ha | 4 ha |
| 2015 | 4 ha | under 1 ha | 5 ha |
| 2016 | 8 ha | under 1 ha | 8 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | 1 ha | under 1 ha | 2 ha |
| 2019 | 3 ha | under 1 ha | 3 ha |
| 2020 | 2 ha | under 1 ha | 2 ha |
| 2021 | 3 ha | under 1 ha | 3 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 2 ha | under 1 ha | 2 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Ōmuta?
- Towns and roadscleared for good53% · 58 ha
- Farms, pasture and plantationscleared for good28% · 31 ha
- Loggingcan grow back6.7% · 7 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
- 8,810 ha
- Forest in 2020
- 8,820 ha
- Overall change
- +14 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Ōmuta stayed about the same size, at about 8,820 hectares: new forest grew on about 122 hectares, and about 108 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 Ōmuta
What is the air quality (AQI) in Ōmuta right now?
The latest reading for Ōmuta shows an AQI of 43 (Good), measured Nov 11, 23:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Naka, Yamaga, Kumamoto, Japan (山鹿健康センター山鹿市), 23.5 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Ōmuta today?
At AQI 43 (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 Ōmuta been like this week?
Over the last 7 days, the CAMS air-quality model put Ōmuta's daily AQI at 49 on average, from 27 on Nov 10 to an hourly peak of 82 on Nov 11. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Ōmuta lost since 2001?
Since 2001, the area within 10 km of Ōmuta has lost about 110 hectares of forest (about 150 football pitches): 1.5% of the forest it had in 2000. Most of it (81%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Ōmuta stayed about the same size, at about 8,820 hectares: new forest grew on about 122 hectares, and about 108 hectares were lost.
What is the tree count in Ōmuta?
Ōmuta has an estimated 51,318 trees across the 12.44 km² of land measured — 16.5% tree cover, 13 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Ōmuta need?
Ōmuta needs roughly 41,987 more trees to close a 13-point shortfall against its 30% tree-cover target — about 923.7 t of extra CO₂ absorbed per year once grown.
How are Ōmuta's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Yamanouemachi, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Yamanouemachi; the tree count is an estimate derived from that cover.
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