City report · Mie, Japan
Yokkaichi Air quality today
Air quality in Yokkaichi currently reads AQI 31 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 31
Good
- PM2.5, fine particles (µg/m³)
- 4.6
- tree cover
- 3.8%
- trees in this area
- 11.8K
- more trees needed
- 81.4K
Measured across a 2 km radius around 1 Chome-2 Yasujima, Yokkaichi, Mie 510-0075, Japan (12.57 km²), from a satellite image of Aug 24, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Yokkaichi · AQI 31 (Good)
Yokkaichi's tree count comes to 11,807 trees across 12.43 km² of land, 26 points below the 30% tree-cover level considered healthy for this area, so roughly 81,404 more trees would close the gap.
Air quality detail
Air quality in Yokkaichi today: AQI 31, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 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
4.6
PM10
5.3
NO₂
11.9
O₃
69.0
SO₂
6.2
CO
275.0
- 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 Yokkaichi's daily AQI at 42 on average, from 31 on Nov 7 to an hourly peak of 67 on Nov 9.
Where Yokkaichi stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Yokkaichi: Critically low
3.8% tree cover against a 30% healthy-neighborhood target, across 12.43 km² of land.
Trees in this area
11,807
Target trees
93,211
More trees needed
81,404
CO₂ if planted / yr
1,791 t
Deforestation · 2001–2025
How much forest has Yokkaichi lost?
Since 2001, the area within 10 km of Yokkaichi has lost about 277 hectares of forest (about 390 football pitches): 9.6% of the forest it had in 2000. Most of it (97%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km west of the city center.
- Forest lost since 2001
- 277 haabout 390 football pitches
- Share of its forest
- 9.6%of what there was in 2000
- Cleared for good
- 268 hadeforestation: turned into farms, mines or towns
The worst year was 2019, when about 45 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 | 4 ha | 1 ha | 6 ha |
| 2002 | 9 ha | under 1 ha | 9 ha |
| 2003 | 2 ha | under 1 ha | 3 ha |
| 2004 | 7 ha | under 1 ha | 7 ha |
| 2005 | 5 ha | under 1 ha | 5 ha |
| 2006 | 9 ha | under 1 ha | 10 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | 22 ha | 1 ha | 23 ha |
| 2009 | 13 ha | under 1 ha | 13 ha |
| 2010 | 13 ha | under 1 ha | 13 ha |
| 2011 | 5 ha | under 1 ha | 5 ha |
| 2012 | 11 ha | under 1 ha | 11 ha |
| 2013 | 3 ha | under 1 ha | 3 ha |
| 2014 | 13 ha | under 1 ha | 13 ha |
| 2015 | 5 ha | under 1 ha | 5 ha |
| 2016 | 18 ha | under 1 ha | 19 ha |
| 2017 | 8 ha | under 1 ha | 9 ha |
| 2018 | 44 ha | under 1 ha | 44 ha |
| 2019 | 45 ha | under 1 ha | 45 ha |
| 2020 | 5 ha | under 1 ha | 6 ha |
| 2021 | 4 ha | under 1 ha | 4 ha |
| 2022 | 5 ha | under 1 ha | 5 ha |
| 2023 | 10 ha | under 1 ha | 10 ha |
| 2024 | 4 ha | under 1 ha | 4 ha |
| 2025 | 5 ha | under 1 ha | 6 ha |
What is causing deforestation around Yokkaichi?
- Towns and roadscleared for good97% · 268 ha
- Unknown causescause unknown3.4% · 9 ha
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
- 3,960 ha
- Forest in 2020
- 3,700 ha
- Overall change
- −262 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Yokkaichi shrank from about 3,960 hectares to 3,700 hectares, a net loss of about 262 hectares (−6.6%). New forest grew on about 127 hectares, but 389 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 Yokkaichi
What is the air quality (AQI) in Yokkaichi right now?
The latest reading for Yokkaichi shows an AQI of 31 (Good), observed Nov 11, 11:00 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 Yokkaichi 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 Yokkaichi been like this week?
Over the last 7 days, the CAMS air-quality model put Yokkaichi's daily AQI at 42 on average, from 31 on Nov 7 to an hourly peak of 67 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 Yokkaichi lost since 2001?
Since 2001, the area within 10 km of Yokkaichi has lost about 277 hectares of forest (about 390 football pitches): 9.6% of the forest it had in 2000. Most of it (97%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Yokkaichi shrank from about 3,960 hectares to 3,700 hectares, a net loss of about 262 hectares (−6.6%). New forest grew on about 127 hectares, but 389 hectares were lost.
What is the tree count in Yokkaichi?
Yokkaichi has an estimated 11,807 trees across the 12.43 km² of land measured — 3.8% tree cover, 26 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Yokkaichi need?
Yokkaichi needs roughly 81,404 more trees to close a 26-point shortfall against its 30% tree-cover target — about 1,791 t of extra CO₂ absorbed per year once grown.
How are Yokkaichi'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 1 Chome-2 Yasujima; the tree count is an estimate derived from that cover.
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