City report · Hokkaido, Japan
Tomakomai Air quality today
Air quality in Tomakomai currently reads AQI 31 (Good): Air quality is satisfactory for everyone.
AQI 31
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 5.5
- tree cover
- 10.8%
- trees in this area
- 28.3K
- more trees needed
- 50.2K
Measured across a 2 km radius around 3 Chome-4 Wakakusacho, Tomakomai, Hokkaido 053-0021, Japan (12.57 km²), from a satellite image of Sep 23, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Tomakomai · AQI 31 (Good)
Tomakomai's tree count comes to 28,263 trees across 10.47 km² of land, 19 points below the 30% tree-cover level considered healthy for this area, so roughly 50,245 more trees would close the gap.
Air quality detail
Air quality in Tomakomai today: AQI 31, Good
Main pollutant: PM2.5 · Observed Nov 12, 01:00 local time via OpenAQ and World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · 苫小牧市沼ノ端中央５－４, 8 km away · median of 6 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.5
PM10
6.5
NO₂
22.6
O₃
—
SO₂
2.6
CO
229.1
Data: OpenAQ · Ministry of the Environment Air Pollutant Wide Area Monitoring System, 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), Hokkaido Prefecture EPA (北海道)
- 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 Tomakomai's daily AQI at 39 on average, from 17 on Nov 6 to an hourly peak of 65 on Nov 10.
Where Tomakomai stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Tomakomai: Critically low
10.8% tree cover against a 30% healthy-neighborhood target, across 10.47 km² of land.
Trees in this area
28,263
Target trees
78,508
More trees needed
50,245
CO₂ if planted / yr
1,105 t
Deforestation · 2001–2025
How much forest has Tomakomai lost?
Since 2001, the area within 10 km of Tomakomai has lost about 1,120 hectares of forest (about 1,600 football pitches): 11% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 4 hectares (under 1%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 1,120 haabout 1,600 football pitches
- Share of its forest
- 11%of what there was in 2000
- Cleared for good
- 4 hadeforestation: turned into farms, mines or towns
The worst year was 2006, when about 340 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 | 4 ha | 4 ha |
| 2002 | under 1 ha | 25 ha | 25 ha |
| 2003 | under 1 ha | 4 ha | 4 ha |
| 2004 | under 1 ha | 117 ha | 117 ha |
| 2005 | under 1 ha | 262 ha | 262 ha |
| 2006 | under 1 ha | 340 ha | 340 ha |
| 2007 | under 1 ha | 107 ha | 108 ha |
| 2008 | under 1 ha | 90 ha | 90 ha |
| 2009 | under 1 ha | 10 ha | 10 ha |
| 2010 | under 1 ha | 38 ha | 38 ha |
| 2011 | 1 ha | 12 ha | 13 ha |
| 2012 | under 1 ha | 54 ha | 54 ha |
| 2013 | under 1 ha | 1 ha | 1 ha |
| 2014 | under 1 ha | 1 ha | 1 ha |
| 2015 | under 1 ha | 5 ha | 5 ha |
| 2016 | 1 ha | 22 ha | 23 ha |
| 2017 | under 1 ha | 6 ha | 6 ha |
| 2018 | under 1 ha | 3 ha | 3 ha |
| 2019 | under 1 ha | 3 ha | 3 ha |
| 2020 | under 1 ha | 4 ha | 4 ha |
| 2021 | under 1 ha | 3 ha | 3 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | 1 ha | 1 ha |
| 2024 | under 1 ha | 6 ha | 6 ha |
| 2025 | under 1 ha | 3 ha | 3 ha |
What is causing deforestation around Tomakomai?
- Loggingcan grow back99% · 1,110 ha
Also: towns and roads, storms, floods and other natural causes, 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
- 9,720 ha
- Forest in 2020
- 9,190 ha
- Overall change
- −526 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Tomakomai shrank from about 9,720 hectares to 9,190 hectares, a net loss of about 526 hectares (−5.4%). New forest grew on about 88 hectares, but 614 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 Tomakomai
What is the air quality (AQI) in Tomakomai right now?
The latest reading for Tomakomai shows an AQI of 31 (Good), measured Nov 12, 01:00 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 苫小牧市沼ノ端中央５－４, 8 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Tomakomai today?
At AQI 31 (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 Tomakomai been like this week?
Over the last 7 days, the CAMS air-quality model put Tomakomai's daily AQI at 39 on average, from 17 on Nov 6 to an hourly peak of 65 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Tomakomai lost since 2001?
Since 2001, the area within 10 km of Tomakomai has lost about 1,120 hectares of forest (about 1,600 football pitches): 11% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 4 hectares (under 1%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Tomakomai shrank from about 9,720 hectares to 9,190 hectares, a net loss of about 526 hectares (−5.4%). New forest grew on about 88 hectares, but 614 hectares were lost.
What is the tree count in Tomakomai?
Tomakomai has an estimated 28,263 trees across the 10.47 km² of land measured — 10.8% tree cover, 19 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Tomakomai need?
Tomakomai needs roughly 50,245 more trees to close a 19-point shortfall against its 30% tree-cover target — about 1,105 t of extra CO₂ absorbed per year once grown.
How are Tomakomai's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 3 Chome-4 Wakakusacho, 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 3 Chome-4 Wakakusacho; the tree count is an estimate derived from that cover.
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