City report · Hokkaido, Japan
Asahikawa Air quality today
Air quality in Asahikawa 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
- 11.4%
- trees in this area
- 35.7K
- more trees needed
- 58.2K
Measured across a 2 km radius around 9 Chome 6 Jodori, Asahikawa, Hokkaido 070-0036, Japan (12.57 km²), from a satellite image of Sep 23, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Asahikawa · AQI 22 (Good)
Asahikawa's tree count comes to 35,671 trees across 12.52 km² of land, 19 points below the 30% tree-cover level considered healthy for this area, so roughly 58,200 more trees would close the gap.
Air quality detail
Air quality in Asahikawa today: AQI 22, 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 · 旭川市６条通９丁目, 0 m away · median of 5 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
4.0
PM10
3.2
NO₂
12.2
O₃
—
SO₂
7.9
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 Asahikawa's daily AQI at 30 on average, from 17 on Nov 6 to an hourly peak of 58 on Nov 11.
Where Asahikawa stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Asahikawa: Critically low
11.4% tree cover against a 30% healthy-neighborhood target, across 12.52 km² of land.
Trees in this area
35,671
Target trees
93,871
More trees needed
58,200
CO₂ if planted / yr
1,280 t
Deforestation · 2001–2025
How much forest has Asahikawa lost?
Since 2001, the area within 10 km of Asahikawa has lost about 241 hectares of forest (about 340 football pitches): 2.7% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 35 hectares (14%) 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 northwest of the city center.
- Forest lost since 2001
- 241 haabout 340 football pitches
- Share of its forest
- 2.7%of what there was in 2000
- Cleared for good
- 35 hadeforestation: turned into farms, mines or towns
The worst year was 2020, when about 25 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 | 1 ha | 1 ha |
| 2002 | 1 ha | 2 ha | 3 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 4 ha | 10 ha | 14 ha |
| 2005 | under 1 ha | 9 ha | 10 ha |
| 2006 | 2 ha | 16 ha | 17 ha |
| 2007 | 2 ha | 10 ha | 11 ha |
| 2008 | under 1 ha | 5 ha | 6 ha |
| 2009 | under 1 ha | 1 ha | 2 ha |
| 2010 | 2 ha | 9 ha | 11 ha |
| 2011 | under 1 ha | 5 ha | 6 ha |
| 2012 | 2 ha | 5 ha | 7 ha |
| 2013 | under 1 ha | 5 ha | 5 ha |
| 2014 | 5 ha | 6 ha | 10 ha |
| 2015 | under 1 ha | 2 ha | 3 ha |
| 2016 | 2 ha | 8 ha | 10 ha |
| 2017 | 1 ha | 2 ha | 3 ha |
| 2018 | under 1 ha | 10 ha | 10 ha |
| 2019 | 2 ha | under 1 ha | 2 ha |
| 2020 | 4 ha | 21 ha | 25 ha |
| 2021 | 2 ha | 20 ha | 21 ha |
| 2022 | under 1 ha | 17 ha | 17 ha |
| 2023 | 2 ha | 22 ha | 24 ha |
| 2024 | under 1 ha | 18 ha | 18 ha |
| 2025 | 1 ha | 4 ha | 5 ha |
What is causing deforestation around Asahikawa?
- Loggingcan grow back82% · 198 ha
- Towns and roadscleared for good11% · 27 ha
- Farms, pasture and plantationscleared for good2.5% · 6 ha
Also: mining and energy, 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
- 8,460 ha
- Forest in 2020
- 8,550 ha
- Overall change
- +95 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Asahikawa stayed about the same size, at about 8,550 hectares: new forest grew on about 300 hectares, and about 205 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 Asahikawa
What is the air quality (AQI) in Asahikawa right now?
The latest reading for Asahikawa shows an AQI of 22 (Good), measured Nov 12, 01:00 local time by 5 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 旭川市６条通９丁目, 0 m away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Asahikawa 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 Asahikawa been like this week?
Over the last 7 days, the CAMS air-quality model put Asahikawa's daily AQI at 30 on average, from 17 on Nov 6 to an hourly peak of 58 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 Asahikawa lost since 2001?
Since 2001, the area within 10 km of Asahikawa has lost about 241 hectares of forest (about 340 football pitches): 2.7% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 35 hectares (14%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Asahikawa stayed about the same size, at about 8,550 hectares: new forest grew on about 300 hectares, and about 205 hectares were lost.
What is the tree count in Asahikawa?
Asahikawa has an estimated 35,671 trees across the 12.52 km² of land measured — 11.4% tree cover, 19 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Asahikawa need?
Asahikawa needs roughly 58,200 more trees to close a 19-point shortfall against its 30% tree-cover target — about 1,280 t of extra CO₂ absorbed per year once grown.
How are Asahikawa's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 9 Chome 6 Jodori, 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 9 Chome 6 Jodori; the tree count is an estimate derived from that cover.
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