City report · Tochigi, Japan
Utsunomiya Air quality today
Air quality in Utsunomiya currently reads AQI 22 (Good): Air quality is satisfactory for everyone.
AQI 22
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 4.0
- tree cover
- 9.8%
- trees in this area
- 30.8K
- more trees needed
- 63.5K
Measured across a 2 km radius around 1 Chome-1 Hanawada, Utsunomiya, Tochigi 320-0027, Japan (12.57 km²), from a satellite image of Jul 20, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Utsunomiya · AQI 22 (Good)
Utsunomiya's tree count comes to 30,788 trees across 12.57 km², 20 points below the 30% tree-cover level considered healthy for this area, so roughly 63,460 more trees would close the gap.
Air quality detail
Air quality in Utsunomiya today: AQI 22, Good
Main pollutant: PM2.5 · Observed Nov 12, 02:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 宇都宮市雀宮７丁目２８番１６号, 9.3 km away · median of 6 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
4.0
PM10
—
NO₂
16.9
O₃
—
SO₂
0.0
CO
229.1
Data: OpenAQ · Ministry of the Environment Air Pollutant Wide Area Monitoring System
- 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 Utsunomiya's daily AQI at 34 on average, from 15 on Nov 7 to an hourly peak of 108 on Nov 6.
Where Utsunomiya stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Utsunomiya: Critically low
9.8% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
30,788
Target trees
94,248
More trees needed
63,460
CO₂ if planted / yr
1,396 t
Deforestation · 2001–2025
How much forest has Utsunomiya lost?
Since 2001, the area within 10 km of Utsunomiya has lost about 262 hectares of forest (about 370 football pitches): 5.4% of the forest it had in 2000. Most of it (85%) 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
- 262 haabout 370 football pitches
- Share of its forest
- 5.4%of what there was in 2000
- Cleared for good
- 222 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 29 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 | 3 ha | 1 ha | 5 ha |
| 2002 | 8 ha | 3 ha | 11 ha |
| 2003 | 1 ha | under 1 ha | 2 ha |
| 2004 | 5 ha | under 1 ha | 6 ha |
| 2005 | 5 ha | under 1 ha | 5 ha |
| 2006 | 9 ha | 3 ha | 12 ha |
| 2007 | 6 ha | under 1 ha | 7 ha |
| 2008 | 12 ha | 1 ha | 13 ha |
| 2009 | 3 ha | 1 ha | 4 ha |
| 2010 | 26 ha | 3 ha | 29 ha |
| 2011 | 11 ha | 3 ha | 13 ha |
| 2012 | 19 ha | 7 ha | 25 ha |
| 2013 | 4 ha | 2 ha | 6 ha |
| 2014 | 15 ha | under 1 ha | 16 ha |
| 2015 | 13 ha | under 1 ha | 14 ha |
| 2016 | 8 ha | under 1 ha | 9 ha |
| 2017 | 8 ha | under 1 ha | 9 ha |
| 2018 | 16 ha | under 1 ha | 16 ha |
| 2019 | 2 ha | under 1 ha | 3 ha |
| 2020 | 7 ha | 1 ha | 9 ha |
| 2021 | 8 ha | under 1 ha | 8 ha |
| 2022 | 9 ha | 1 ha | 11 ha |
| 2023 | 6 ha | 7 ha | 13 ha |
| 2024 | 8 ha | under 1 ha | 9 ha |
| 2025 | 8 ha | 2 ha | 10 ha |
What is causing deforestation around Utsunomiya?
- Towns and roadscleared for good84% · 219 ha
- Loggingcan grow back7.8% · 20 ha
- Mining and energycleared for good1% · 3 ha
Also: 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
- 5,660 ha
- Forest in 2020
- 5,360 ha
- Overall change
- −299 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Utsunomiya shrank from about 5,660 hectares to 5,360 hectares, a net loss of about 299 hectares (−5.3%). New forest grew on about 133 hectares, but 432 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 Utsunomiya
What is the air quality (AQI) in Utsunomiya right now?
The latest reading for Utsunomiya shows an AQI of 22 (Good), measured Nov 12, 02:00 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 宇都宮市雀宮７丁目２８番１６号, 9.3 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Utsunomiya 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 Utsunomiya been like this week?
Over the last 7 days, the CAMS air-quality model put Utsunomiya's daily AQI at 34 on average, from 15 on Nov 7 to an hourly peak of 108 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 Utsunomiya lost since 2001?
Since 2001, the area within 10 km of Utsunomiya has lost about 262 hectares of forest (about 370 football pitches): 5.4% of the forest it had in 2000. Most of it (85%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Utsunomiya shrank from about 5,660 hectares to 5,360 hectares, a net loss of about 299 hectares (−5.3%). New forest grew on about 133 hectares, but 432 hectares were lost.
What is the tree count in Utsunomiya?
Utsunomiya has an estimated 30,788 trees across the 12.57 km² measured — 9.8% tree cover, 20 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Utsunomiya need?
Utsunomiya needs roughly 63,460 more trees to close a 20-point shortfall against its 30% tree-cover target — about 1,396 t of extra CO₂ absorbed per year once grown.
How are Utsunomiya's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 1 Chome-1 Hanawada, 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 1 Chome-1 Hanawada; the tree count is an estimate derived from that cover.
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