City report · Saitama, Japan
Iruma Air quality today
Air quality in Iruma currently reads AQI 8 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 8
Good
- PM2.5, fine particles (µg/m³)
- 0.9
- tree cover
- 37.2%
- trees in this area
- 117K
- more trees needed
- 0
Measured across a 2 km radius around Araku, Iruma, Saitama 358-0031, Japan (12.57 km²), from a satellite image of Jul 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Iruma · AQI 8 (Good)
Iruma's tree count comes to 116,867 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Iruma today: AQI 8, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 16 ground-station cities within 85 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 16 station cities within 85 km, e.g. Niiza and Fuchu
Health signal
Air quality is satisfactory for everyone.
PM2.5
0.9
PM10
4.2
NO₂
3.4
O₃
78.0
SO₂
2.1
CO
194.0
- 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 Iruma's daily AQI at 46 on average, from 19 on Nov 7 to an hourly peak of 77 on Nov 10.
Where Iruma stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Iruma: Healthy tree cover
37.2% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
116,867
Target trees
116,867
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Iruma lost?
Since 2001, the area within 10 km of Iruma has lost about 220 hectares of forest (about 310 football pitches): 2.9% of the forest it had in 2000. Most of it (78%) 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
- 220 haabout 310 football pitches
- Share of its forest
- 2.9%of what there was in 2000
- Cleared for good
- 171 hadeforestation: turned into farms, mines or towns
The worst year was 2008, when about 23 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 | 3 ha | 6 ha |
| 2002 | 6 ha | 9 ha | 15 ha |
| 2003 | 3 ha | under 1 ha | 3 ha |
| 2004 | 6 ha | 1 ha | 8 ha |
| 2005 | 5 ha | 2 ha | 7 ha |
| 2006 | 10 ha | 4 ha | 14 ha |
| 2007 | 18 ha | 2 ha | 20 ha |
| 2008 | 21 ha | 2 ha | 23 ha |
| 2009 | 8 ha | 7 ha | 16 ha |
| 2010 | 8 ha | 5 ha | 13 ha |
| 2011 | 2 ha | under 1 ha | 2 ha |
| 2012 | 9 ha | 2 ha | 10 ha |
| 2013 | 1 ha | under 1 ha | 1 ha |
| 2014 | 2 ha | under 1 ha | 2 ha |
| 2015 | 3 ha | under 1 ha | 3 ha |
| 2016 | 7 ha | under 1 ha | 8 ha |
| 2017 | 2 ha | under 1 ha | 3 ha |
| 2018 | 17 ha | 2 ha | 19 ha |
| 2019 | 6 ha | under 1 ha | 7 ha |
| 2020 | 2 ha | under 1 ha | 3 ha |
| 2021 | 16 ha | under 1 ha | 16 ha |
| 2022 | 6 ha | 4 ha | 10 ha |
| 2023 | 3 ha | 1 ha | 4 ha |
| 2024 | 3 ha | under 1 ha | 3 ha |
| 2025 | 3 ha | 2 ha | 5 ha |
What is causing deforestation around Iruma?
- Towns and roadscleared for good75% · 166 ha
- Loggingcan grow back7.8% · 17 ha
- Storms, floods and other natural causescan grow back4.3% · 9 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
- 9,240 ha
- Forest in 2020
- 8,950 ha
- Overall change
- −292 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Iruma shrank from about 9,240 hectares to 8,950 hectares, a net loss of about 292 hectares (−3.2%). New forest grew on about 81 hectares, but 373 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 Iruma
What is the air quality (AQI) in Iruma right now?
The latest reading for Iruma shows an AQI of 8 (Good), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 16 ground-station cities within 85 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Iruma today?
At AQI 8 (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 Iruma been like this week?
Over the last 7 days, the CAMS air-quality model put Iruma's daily AQI at 46 on average, from 19 on Nov 7 to an hourly peak of 77 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 Iruma lost since 2001?
Since 2001, the area within 10 km of Iruma has lost about 220 hectares of forest (about 310 football pitches): 2.9% of the forest it had in 2000. Most of it (78%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Iruma shrank from about 9,240 hectares to 8,950 hectares, a net loss of about 292 hectares (−3.2%). New forest grew on about 81 hectares, but 373 hectares were lost.
What is the tree count in Iruma?
Iruma has an estimated 116,867 trees across the 12.57 km² measured — 37.2% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Iruma need?
Iruma has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Iruma'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 Araku; the tree count is an estimate derived from that cover.
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