City report · Hyōgo, Japan
Sandachō Air quality today
Air quality in Sandachō currently reads AQI 28 (Good): Air quality is satisfactory for everyone.
AQI 28
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 5.0
- tree cover
- 34.3%
- trees in this area
- 108K
- more trees needed
- 0
Measured across a 2 km radius around 13 Sandacho, Sanda, Hyogo 669-1533, Japan (12.57 km²), from a satellite image of Aug 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Sandachō · AQI 28 (Good)
Sandachō's tree count comes to 107,757 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Sandachō today: AQI 28, 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 · Asahigaokacho, Ashiya, Hyogo Prefecture, Japan (朝日ヶ丘小学校芦屋市), 16.9 km away · median of 3 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.0
PM10
8.6
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), Hyogo Prefecture EPA (兵庫県／兵庫の環境トップページ)
- 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 Sandachō's daily AQI at 44 on average, from 28 on Nov 10 to an hourly peak of 70 on Nov 6.
Where Sandachō stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Sandachō: Healthy tree cover
34.3% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
107,757
Target trees
107,757
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Sandachō lost?
Since 2001, the area within 10 km of Sandachō has lost about 389 hectares of forest (about 540 football pitches): 2.3% of the forest it had in 2000. Most of it (75%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area about 5 km south of the city center.
- Forest lost since 2001
- 389 haabout 540 football pitches
- Share of its forest
- 2.3%of what there was in 2000
- Cleared for good
- 291 hadeforestation: turned into farms, mines or towns
The worst year was 2011, when about 48 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 | 7 ha | 3 ha | 10 ha |
| 2002 | 9 ha | 1 ha | 10 ha |
| 2003 | 10 ha | under 1 ha | 10 ha |
| 2004 | 15 ha | 16 ha | 31 ha |
| 2005 | 4 ha | 9 ha | 12 ha |
| 2006 | 6 ha | 5 ha | 11 ha |
| 2007 | 4 ha | 2 ha | 5 ha |
| 2008 | 18 ha | 12 ha | 30 ha |
| 2009 | 15 ha | 5 ha | 19 ha |
| 2010 | 6 ha | 5 ha | 11 ha |
| 2011 | 46 ha | 2 ha | 48 ha |
| 2012 | 39 ha | 7 ha | 46 ha |
| 2013 | 26 ha | 2 ha | 27 ha |
| 2014 | 14 ha | 3 ha | 17 ha |
| 2015 | 5 ha | 2 ha | 6 ha |
| 2016 | 6 ha | 3 ha | 9 ha |
| 2017 | 2 ha | 4 ha | 6 ha |
| 2018 | 3 ha | 4 ha | 7 ha |
| 2019 | 4 ha | 4 ha | 8 ha |
| 2020 | 1 ha | 2 ha | 3 ha |
| 2021 | 9 ha | under 1 ha | 9 ha |
| 2022 | 17 ha | 2 ha | 19 ha |
| 2023 | 21 ha | under 1 ha | 22 ha |
| 2024 | 5 ha | 1 ha | 6 ha |
| 2025 | under 1 ha | 5 ha | 5 ha |
What is causing deforestation around Sandachō?
- Towns and roadscleared for good55% · 213 ha
- Mining and energycleared for good19% · 75 ha
- Loggingcan grow back18% · 70 ha
Also: farms, pasture and plantations, 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
- 18,700 ha
- Forest in 2020
- 18,600 ha
- Overall change
- −70 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Sandachō stayed about the same size, at about 18,600 hectares: new forest grew on about 235 hectares, and about 305 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 Sandachō
Same 2 km radius, same index — so they compare directly.
- Takarazuka15.2 km
Japan
- Tree cover
- 9%
- Air quality
- 51
- Nishinomiya21.1 km
Japan
- Tree cover
- 8%
- Air quality
- 51
- Kobe21.8 km
Japan
- Tree cover
- 28%
- Air quality
- 28
- Toyonaka24.9 km
Japan
- Tree cover
- 10%
- Air quality
- 52
- Akashi32.5 km
Japan
- Tree cover
- 10%
- Air quality
- 39
- Osaka32.8 km
Japan
- Tree cover
- 3%
- Air quality
- 58
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Frequently asked
Questions about Sandachō
What is the air quality (AQI) in Sandachō right now?
The latest reading for Sandachō shows an AQI of 28 (Good), measured Nov 12, 00:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Asahigaokacho, Ashiya, Hyogo Prefecture, Japan (朝日ヶ丘小学校芦屋市), 16.9 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Sandachō today?
At AQI 28 (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 Sandachō been like this week?
Over the last 7 days, the CAMS air-quality model put Sandachō's daily AQI at 44 on average, from 28 on Nov 10 to an hourly peak of 70 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 Sandachō lost since 2001?
Since 2001, the area within 10 km of Sandachō has lost about 389 hectares of forest (about 540 football pitches): 2.3% of the forest it had in 2000. Most of it (75%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Sandachō stayed about the same size, at about 18,600 hectares: new forest grew on about 235 hectares, and about 305 hectares were lost.
What is the tree count in Sandachō?
Sandachō has an estimated 107,757 trees across the 12.57 km² measured — 34.3% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Sandachō need?
Sandachō has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Sandachō's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 13 Sandacho, 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 13 Sandacho; the tree count is an estimate derived from that cover.
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