City report · Iwate, Japan
Ōshū Air quality today
Air quality in Ōshū currently reads AQI 28 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 28
Good
- PM2.5, fine particles (µg/m³)
- 5.2
- tree cover
- 14.1%
- trees in this area
- 42.7K
- more trees needed
- 48.2K
Measured across a 2 km radius around Senoue Mizusawaku Sakurakawa, Oshu, Iwate 023-0003, Japan (12.57 km²), from a satellite image of Jul 10, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Ōshū · AQI 28 (Good)
Ōshū's tree count comes to 42,746 trees across 12.13 km² of land, 16 points below the 30% tree-cover level considered healthy for this area, so roughly 48,203 more trees would close the gap.
Air quality detail
Air quality in Ōshū today: AQI 28, 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
5.2
PM10
8.5
NO₂
1.7
O₃
84.0
SO₂
1.3
CO
136.0
- 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 Ōshū's daily AQI at 34 on average, from 16 on Nov 10 to an hourly peak of 59 on Nov 9.
Where Ōshū stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Ōshū: Critically low
14.1% tree cover against a 30% healthy-neighborhood target, across 12.13 km² of land.
Trees in this area
42,746
Target trees
90,949
More trees needed
48,203
CO₂ if planted / yr
1,060 t
Deforestation · 2001–2025
How much forest has Ōshū lost?
Since 2001, the area within 10 km of Ōshū has lost about 678 hectares of forest (about 950 football pitches): 6.7% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 116 hectares (17%) 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 east of the city center.
- Forest lost since 2001
- 678 haabout 950 football pitches
- Share of its forest
- 6.7%of what there was in 2000
- Cleared for good
- 116 hadeforestation: turned into farms, mines or towns
The worst year was 2018, when about 71 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 | 12 ha | 15 ha | 27 ha |
| 2002 | 4 ha | 11 ha | 15 ha |
| 2003 | 2 ha | 26 ha | 28 ha |
| 2004 | 3 ha | 21 ha | 24 ha |
| 2005 | 3 ha | 24 ha | 27 ha |
| 2006 | 5 ha | 30 ha | 35 ha |
| 2007 | 10 ha | 37 ha | 47 ha |
| 2008 | 1 ha | 10 ha | 11 ha |
| 2009 | 5 ha | 16 ha | 21 ha |
| 2010 | 2 ha | 3 ha | 4 ha |
| 2011 | 7 ha | 26 ha | 32 ha |
| 2012 | 13 ha | 32 ha | 45 ha |
| 2013 | 2 ha | 6 ha | 7 ha |
| 2014 | 2 ha | 12 ha | 14 ha |
| 2015 | 2 ha | 6 ha | 8 ha |
| 2016 | 8 ha | 17 ha | 25 ha |
| 2017 | 5 ha | 30 ha | 34 ha |
| 2018 | 4 ha | 67 ha | 71 ha |
| 2019 | 3 ha | 45 ha | 48 ha |
| 2020 | 3 ha | 26 ha | 30 ha |
| 2021 | 2 ha | 11 ha | 12 ha |
| 2022 | under 1 ha | 20 ha | 20 ha |
| 2023 | 15 ha | 32 ha | 47 ha |
| 2024 | 2 ha | 24 ha | 26 ha |
| 2025 | 2 ha | 18 ha | 20 ha |
What is causing deforestation around Ōshū?
- Loggingcan grow back81% · 549 ha
- Towns and roadscleared for good10% · 68 ha
- Mining and energycleared for good4% · 27 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
- 10,000 ha
- Forest in 2020
- 9,820 ha
- Overall change
- −219 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Ōshū shrank from about 10,000 hectares to 9,820 hectares, a net loss of about 219 hectares (−2.2%). New forest grew on about 121 hectares, but 340 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 Ōshū
Same 2 km radius, same index — so they compare directly.
- Ichinoseki24.9 km
Japan
- Tree cover
- 47%
- Air quality
- 14
- Morioka62.4 km
Japan
- Tree cover
- 16%
- Air quality
- 16
- Ōsaki63.5 km
Japan
- Tree cover
- 8%
- Air quality
- 46
- Ishinomaki81.2 km
Japan
- Tree cover
- 6%
- Air quality
- 44
- Sendai100.5 km
Japan
- Tree cover
- 17%
- Air quality
- 46
- Akita110.8 km
Japan
- Tree cover
- 9%
- Air quality
- 24
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Frequently asked
Questions about Ōshū
What is the air quality (AQI) in Ōshū right now?
The latest reading for Ōshū shows an AQI of 28 (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 Ōshū 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 Ōshū been like this week?
Over the last 7 days, the CAMS air-quality model put Ōshū's daily AQI at 34 on average, from 16 on Nov 10 to an hourly peak of 59 on Nov 9. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Ōshū lost since 2001?
Since 2001, the area within 10 km of Ōshū has lost about 678 hectares of forest (about 950 football pitches): 6.7% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 116 hectares (17%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Ōshū shrank from about 10,000 hectares to 9,820 hectares, a net loss of about 219 hectares (−2.2%). New forest grew on about 121 hectares, but 340 hectares were lost.
What is the tree count in Ōshū?
Ōshū has an estimated 42,746 trees across the 12.13 km² of land measured — 14.1% tree cover, 16 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Ōshū need?
Ōshū needs roughly 48,203 more trees to close a 16-point shortfall against its 30% tree-cover target — about 1,060 t of extra CO₂ absorbed per year once grown.
How are Ōshū'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 Senoue Mizusawaku Sakurakawa; the tree count is an estimate derived from that cover.
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