City report · Tochigi, Japan
Tochigi Air quality today
Air quality in Tochigi currently reads AQI 22 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 22
Good
- PM2.5, fine particles (µg/m³)
- 3.2
- tree cover
- 3.6%
- trees in this area
- 11.3K
- more trees needed
- 82.9K
Measured across a 2 km radius around 12 Yorozucho, Tochigi, 328-0015, Japan (12.57 km²), from a satellite image of Jul 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Tochigi · AQI 22 (Good)
Tochigi's tree count comes to 11,310 trees across 12.57 km², 26 points below the 30% tree-cover level considered healthy for this area, so roughly 82,938 more trees would close the gap.
Air quality detail
Air quality in Tochigi today: AQI 22, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 16 ground-station cities within 145 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 16 station cities within 145 km, e.g. Noda and Kawaguchi
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.2
PM10
13.9
NO₂
13.4
O₃
59.0
SO₂
6.9
CO
161.0
- 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 Tochigi's daily AQI at 41 on average, from 12 on Nov 7 to an hourly peak of 85 on Nov 11.
Where Tochigi stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Tochigi: Critically low
3.6% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
11,310
Target trees
94,248
More trees needed
82,938
CO₂ if planted / yr
1,825 t
Deforestation · 2001–2025
How much forest has Tochigi lost?
Since 2001, the area within 10 km of Tochigi has lost about 163 hectares of forest (about 230 football pitches): 2.5% of the forest it had in 2000. Most of it (61%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from September 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 163 haabout 230 football pitches
- Share of its forest
- 2.5%of what there was in 2000
- Cleared for good
- 100 hadeforestation: turned into farms, mines or towns
The worst year was 2012, when about 16 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 | 2 ha | 1 ha | 4 ha |
| 2002 | 4 ha | 7 ha | 10 ha |
| 2003 | under 1 ha | 1 ha | 1 ha |
| 2004 | 1 ha | 1 ha | 2 ha |
| 2005 | 4 ha | 1 ha | 5 ha |
| 2006 | 3 ha | 1 ha | 4 ha |
| 2007 | 1 ha | 4 ha | 5 ha |
| 2008 | 1 ha | 6 ha | 8 ha |
| 2009 | under 1 ha | 2 ha | 2 ha |
| 2010 | 3 ha | 2 ha | 6 ha |
| 2011 | 2 ha | 8 ha | 10 ha |
| 2012 | 11 ha | 5 ha | 16 ha |
| 2013 | 2 ha | under 1 ha | 2 ha |
| 2014 | 2 ha | under 1 ha | 3 ha |
| 2015 | 2 ha | 1 ha | 3 ha |
| 2016 | 14 ha | 2 ha | 15 ha |
| 2017 | 6 ha | 2 ha | 8 ha |
| 2018 | 6 ha | under 1 ha | 7 ha |
| 2019 | 13 ha | under 1 ha | 14 ha |
| 2020 | 3 ha | under 1 ha | 3 ha |
| 2021 | 4 ha | 11 ha | 15 ha |
| 2022 | 7 ha | under 1 ha | 7 ha |
| 2023 | 3 ha | under 1 ha | 3 ha |
| 2024 | 4 ha | 3 ha | 6 ha |
| 2025 | 2 ha | 3 ha | 5 ha |
What is causing deforestation around Tochigi?
- Towns and roadscleared for good39% · 63 ha
- Loggingcan grow back27% · 44 ha
- Mining and energycleared for good22% · 36 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
- 6,810 ha
- Forest in 2020
- 6,770 ha
- Overall change
- −38 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Tochigi stayed about the same size, at about 6,770 hectares: new forest grew on about 153 hectares, and about 191 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 Tochigi
What is the air quality (AQI) in Tochigi right now?
The latest reading for Tochigi shows an AQI of 22 (Good), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 16 ground-station cities within 145 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Tochigi today?
At AQI 22 (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 Tochigi been like this week?
Over the last 7 days, the CAMS air-quality model put Tochigi's daily AQI at 41 on average, from 12 on Nov 7 to an hourly peak of 85 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 Tochigi lost since 2001?
Since 2001, the area within 10 km of Tochigi has lost about 163 hectares of forest (about 230 football pitches): 2.5% of the forest it had in 2000. Most of it (61%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Tochigi stayed about the same size, at about 6,770 hectares: new forest grew on about 153 hectares, and about 191 hectares were lost.
What is the tree count in Tochigi?
Tochigi has an estimated 11,310 trees across the 12.57 km² measured — 3.6% tree cover, 26 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Tochigi need?
Tochigi needs roughly 82,938 more trees to close a 26-point shortfall against its 30% tree-cover target — about 1,825 t of extra CO₂ absorbed per year once grown.
How are Tochigi'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 12 Yorozucho; the tree count is an estimate derived from that cover.
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