City report · Kagawa, Japan
Marugame Air quality today
Air quality in Marugame currently reads AQI 52 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 52
Moderate
- PM2.5, fine particles (µg/m³)
- 9.0
- tree cover
- 6.1%
- trees in this area
- 17.4K
- more trees needed
- 68.3K
Measured across a 2 km radius around Imazucho, Marugame, Kagawa 763-0051, Japan (12.57 km²), from a satellite image of Aug 30, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Marugame · AQI 52 (Moderate)
Marugame's tree count comes to 17,420 trees across 11.43 km² of land, 24 points below the 30% tree-cover level considered healthy for this area, so roughly 68,251 more trees would close the gap.
Air quality detail
Air quality in Marugame today: AQI 52, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
9.0
PM10
12.1
NO₂
17.8
O₃
68.0
SO₂
12.0
CO
147.0
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Marugame's daily AQI at 45 on average, from 33 on Nov 10 to an hourly peak of 69 on Nov 6.
Where Marugame stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Marugame: Critically low
6.1% tree cover against a 30% healthy-neighborhood target, across 11.43 km² of land.
Trees in this area
17,420
Target trees
85,671
More trees needed
68,251
CO₂ if planted / yr
1,502 t
Deforestation · 2001–2025
How much forest has Marugame lost?
Since 2001, the area within 10 km of Marugame has lost about 31 hectares of forest (about 44 football pitches): under 1% of the forest it had in 2000. Most of it (57%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 31 haabout 44 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 18 hadeforestation: turned into farms, mines or towns
The worst year was 2007, when about 5 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 | under 1 ha | 1 ha |
| 2002 | under 1 ha | 2 ha | 3 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 2 ha | 1 ha | 3 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | 2 ha | 2 ha | 5 ha |
| 2008 | 2 ha | under 1 ha | 3 ha |
| 2009 | under 1 ha | 1 ha | 2 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 1 ha | 1 ha | 3 ha |
| 2013 | 1 ha | under 1 ha | 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 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 | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 1 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 Marugame?
- Towns and roadscleared for good56% · 18 ha
- Loggingcan grow back20% · 6 ha
- Unknown causescause unknown22% · 7 ha
Also: farms, pasture and plantations, wildfires.
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
- 4,290 ha
- Forest in 2020
- 4,320 ha
- Overall change
- +38 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Marugame stayed about the same size, at about 4,320 hectares: new forest grew on about 68 hectares, and about 30 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 Marugame
What is the air quality (AQI) in Marugame right now?
The latest reading for Marugame shows an AQI of 52 (Moderate), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Marugame today?
At AQI 52 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Marugame been like this week?
Over the last 7 days, the CAMS air-quality model put Marugame's daily AQI at 45 on average, from 33 on Nov 10 to an hourly peak of 69 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 Marugame lost since 2001?
Since 2001, the area within 10 km of Marugame has lost about 31 hectares of forest (about 44 football pitches): under 1% of the forest it had in 2000. Most of it (57%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Marugame stayed about the same size, at about 4,320 hectares: new forest grew on about 68 hectares, and about 30 hectares were lost.
What is the tree count in Marugame?
Marugame has an estimated 17,420 trees across the 11.43 km² of land measured — 6.1% tree cover, 24 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Marugame need?
Marugame needs roughly 68,251 more trees to close a 24-point shortfall against its 30% tree-cover target — about 1,502 t of extra CO₂ absorbed per year once grown.
How are Marugame'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 Imazucho; the tree count is an estimate derived from that cover.
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