City report · Tokyo, Japan
Machida Air quality today
Air quality in Machida currently reads AQI 46 (Good): Air quality is satisfactory for everyone.
AQI 46
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 8.2
- tree cover
- 10.6%
- trees in this area
- 33.3K
- more trees needed
- 60.9K
Measured across a 2 km radius around 3 Chome-2 Haramachida, Machida, Tokyo 194-0013, Japan (12.57 km²), from a satellite image of Aug 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Machida · AQI 46 (Good)
Machida's tree count comes to 33,301 trees across 12.57 km², 19 points below the 30% tree-cover level considered healthy for this area, so roughly 60,947 more trees would close the gap.
Air quality detail
Air quality in Machida today: AQI 46, Good
Main pollutant: PM2.5 · Observed Nov 12, 00:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Kanamori, Machida-shi, Tōkyō-to, Japan (町田市金森町田市), 1.7 km away
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.2
PM10
5.4
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), Tokyo, Japan Environment Agency (東京都環境局)
- 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 Machida's daily AQI at 74 on average, from 61 on Nov 7 to an hourly peak of 155 on Nov 5.
Where Machida stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Machida: Critically low
10.6% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
33,301
Target trees
94,248
More trees needed
60,947
CO₂ if planted / yr
1,341 t
Deforestation · 2001–2025
How much forest has Machida lost?
Since 2001, the area within 10 km of Machida has lost about 84 hectares of forest (about 120 football pitches): 2.2% of the forest it had in 2000. Most of it (77%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 84 haabout 120 football pitches
- Share of its forest
- 2.2%of what there was in 2000
- Cleared for good
- 64 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 10 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 | 1 ha | 2 ha |
| 2002 | 8 ha | under 1 ha | 8 ha |
| 2003 | 2 ha | under 1 ha | 3 ha |
| 2004 | 5 ha | under 1 ha | 5 ha |
| 2005 | 1 ha | under 1 ha | 2 ha |
| 2006 | 4 ha | 2 ha | 6 ha |
| 2007 | 6 ha | 2 ha | 9 ha |
| 2008 | 5 ha | 1 ha | 6 ha |
| 2009 | 4 ha | under 1 ha | 5 ha |
| 2010 | 7 ha | 3 ha | 10 ha |
| 2011 | under 1 ha | under 1 ha | 1 ha |
| 2012 | 7 ha | 2 ha | 8 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | 1 ha | under 1 ha | 2 ha |
| 2015 | 3 ha | under 1 ha | 4 ha |
| 2016 | 3 ha | under 1 ha | 4 ha |
| 2017 | 2 ha | under 1 ha | 2 ha |
| 2018 | 2 ha | under 1 ha | 2 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 1 ha | under 1 ha | 1 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 Machida?
- Towns and roadscleared for good77% · 64 ha
- Unknown causescause unknown23% · 19 ha
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
- 6,210 ha
- Forest in 2020
- 6,060 ha
- Overall change
- −154 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Machida shrank from about 6,210 hectares to 6,060 hectares, a net loss of about 154 hectares (−2.5%). New forest grew on about 155 hectares, but 310 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 Machida
What is the air quality (AQI) in Machida right now?
The latest reading for Machida shows an AQI of 46 (Good), measured Nov 12, 00:00 local time by the Kanamori, Machida-shi, Tōkyō-to, Japan (町田市金森町田市) ground monitoring station, 1.7 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Machida today?
At AQI 46 (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 Machida been like this week?
Over the last 7 days, the CAMS air-quality model put Machida's daily AQI at 74 on average, from 61 on Nov 7 to an hourly peak of 155 on Nov 5. On 1 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Machida lost since 2001?
Since 2001, the area within 10 km of Machida has lost about 84 hectares of forest (about 120 football pitches): 2.2% of the forest it had in 2000. Most of it (77%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Machida shrank from about 6,210 hectares to 6,060 hectares, a net loss of about 154 hectares (−2.5%). New forest grew on about 155 hectares, but 310 hectares were lost.
What is the tree count in Machida?
Machida has an estimated 33,301 trees across the 12.57 km² measured — 10.6% tree cover, 19 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Machida need?
Machida needs roughly 60,947 more trees to close a 19-point shortfall against its 30% tree-cover target — about 1,341 t of extra CO₂ absorbed per year once grown.
How are Machida's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 3 Chome-2 Haramachida, 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 3 Chome-2 Haramachida; the tree count is an estimate derived from that cover.
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