City report · Saitama, Japan
Kazo Air quality today
Air quality in Kazo currently reads AQI 46 (Good): Air quality is satisfactory for everyone.
AQI 46
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 8.2
- tree cover
- 3.8%
- trees in this area
- 11.9K
- more trees needed
- 82.3K
Measured across a 2 km radius around Kamitakayanagi, Kazo, Saitama 347-0101, Japan (12.57 km²), from a satellite image of Jul 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Kazo · AQI 46 (Good)
Kazo's tree count comes to 11,938 trees across 12.57 km², 26 points below the 30% tree-cover level considered healthy for this area, so roughly 82,310 more trees would close the gap.
Air quality detail
Air quality in Kazo today: AQI 46, Good
Main pollutant: PM2.5 · Observed Nov 12, 00:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Raiha, Kazo-shi, Saitama-ken, Japan (加須加須市), 2.1 km away
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.2
PM10
10.8
NO₂
—
O₃
—
SO₂
—
CO
—
Data: 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), Saitama Prefecture EPA (埼玉県の大気状況)
- 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 Kazo's daily AQI at 56 on average, from 26 on Nov 7 to an hourly peak of 147 on Nov 5.
Where Kazo stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Kazo: Critically low
3.8% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
11,938
Target trees
94,248
More trees needed
82,310
CO₂ if planted / yr
1,811 t
Deforestation · 2001–2025
How much forest has Kazo lost?
Since 2001, the area within 10 km of Kazo has lost about 4 hectares of forest (about 6 football pitches): 2.8% of the forest it had in 2000. Most of it was lost to towns and roads. About 2 hectares (48%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from June 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 4 haabout 6 football pitches
- Share of its forest
- 2.8%of what there was in 2000
- Cleared for good
- 2 hadeforestation: turned into farms, mines or towns
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | under 1 ha | under 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Kazo?
- Towns and roadscleared for good50% · 2 ha
- Unknown causescause unknown55% · 2 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
- 330 ha
- Forest in 2020
- 342 ha
- Overall change
- +12 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Kazo grew from about 330 hectares to 342 hectares, a net gain of about 12 hectares (+3.6%). New forest grew on about 33 hectares, while 22 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 Kazo
What is the air quality (AQI) in Kazo right now?
The latest reading for Kazo shows an AQI of 46 (Good), measured Nov 12, 00:00 local time by the Raiha, Kazo-shi, Saitama-ken, Japan (加須加須市) ground monitoring station, 2.1 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Kazo today?
At AQI 46 (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 Kazo been like this week?
Over the last 7 days, the CAMS air-quality model put Kazo's daily AQI at 56 on average, from 26 on Nov 7 to an hourly peak of 147 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Kazo lost since 2001?
Since 2001, the area within 10 km of Kazo has lost about 4 hectares of forest (about 6 football pitches): 2.8% of the forest it had in 2000. Most of it was lost to towns and roads. About 2 hectares (48%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Kazo grew from about 330 hectares to 342 hectares, a net gain of about 12 hectares (+3.6%). New forest grew on about 33 hectares, while 22 hectares were lost.
What is the tree count in Kazo?
Kazo has an estimated 11,938 trees across the 12.57 km² measured — 3.8% tree cover, 26 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Kazo need?
Kazo needs roughly 82,310 more trees to close a 26-point shortfall against its 30% tree-cover target — about 1,811 t of extra CO₂ absorbed per year once grown.
How are Kazo's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Kamitakayanagi, 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 Kamitakayanagi; the tree count is an estimate derived from that cover.
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