City report · Chiba, Japan
Inzai Air quality today
Air quality in Inzai currently reads AQI 48 (Good): Air quality is satisfactory for everyone.
AQI 48
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 8.7
- tree cover
- 45.5%
- trees in this area
- 133K
- more trees needed
- 0
Measured across a 2 km radius around Takefukuro, Inzai, Chiba 270-1325, Japan (12.57 km²), from a satellite image of Aug 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Inzai · AQI 48 (Good)
Inzai's tree count comes to 133,222 trees across 11.72 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Inzai today: AQI 48, 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 · Edosaki, Inashiki, Ibaraki, Japan (江戸崎公民館稲敷市), 19.6 km away · median of 2 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.7
PM10
9.7
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), Ibaraki Prefecture EPA (茨城県大気汚染常時監視システム), Chiba Prefecture EPA (千葉県ホームページ)
- 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 Inzai's daily AQI at 35 on average, from 21 on Nov 7 to an hourly peak of 100 on Nov 6.
Where Inzai stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Inzai: Healthy tree cover
45.5% tree cover against a 30% healthy-neighborhood target, across 11.72 km² of land.
Trees in this area
133,222
Target trees
133,222
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Inzai lost?
Since 2001, the area within 10 km of Inzai has lost about 100 hectares of forest (about 140 football pitches): 2.1% of the forest it had in 2000. Most of it (80%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 100 haabout 140 football pitches
- Share of its forest
- 2.1%of what there was in 2000
- Cleared for good
- 80 hadeforestation: turned into farms, mines or towns
The worst year was 2009, when about 14 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 | 2 ha | 2 ha | 4 ha |
| 2002 | 2 ha | under 1 ha | 3 ha |
| 2003 | 1 ha | under 1 ha | 2 ha |
| 2004 | 5 ha | under 1 ha | 5 ha |
| 2005 | 2 ha | under 1 ha | 3 ha |
| 2006 | 5 ha | 2 ha | 6 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | 8 ha | under 1 ha | 8 ha |
| 2009 | 12 ha | 1 ha | 14 ha |
| 2010 | 5 ha | 1 ha | 7 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 7 ha | 2 ha | 9 ha |
| 2013 | 3 ha | under 1 ha | 3 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | 3 ha | under 1 ha | 4 ha |
| 2016 | 5 ha | under 1 ha | 6 ha |
| 2017 | 7 ha | 1 ha | 8 ha |
| 2018 | 5 ha | under 1 ha | 5 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 | 1 ha | under 1 ha | 2 ha |
| 2023 | 2 ha | under 1 ha | 3 ha |
| 2024 | 3 ha | under 1 ha | 3 ha |
| 2025 | 2 ha | 3 ha | 5 ha |
What is causing deforestation around Inzai?
- Towns and roadscleared for good79% · 79 ha
- Farms, pasture and plantationscleared for good1.3% · 1 ha
- Loggingcan grow back1.3% · 1 ha
Also: 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
- 5,550 ha
- Forest in 2020
- 5,420 ha
- Overall change
- −125 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Inzai shrank from about 5,550 hectares to 5,420 hectares, a net loss of about 125 hectares (−2.3%). New forest grew on about 100 hectares, but 225 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
In the same region
Measured cities near Inzai
Same 2 km radius, same index — so they compare directly.
Build your own
Compare Inzai with anywhere
This place
Inzai
Use this data
Put Inzai's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Inzai
What is the air quality (AQI) in Inzai right now?
The latest reading for Inzai shows an AQI of 48 (Good), measured Nov 12, 00:00 local time by 2 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Edosaki, Inashiki, Ibaraki, Japan (江戸崎公民館稲敷市), 19.6 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Inzai today?
At AQI 48 (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 Inzai been like this week?
Over the last 7 days, the CAMS air-quality model put Inzai's daily AQI at 35 on average, from 21 on Nov 7 to an hourly peak of 100 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Inzai lost since 2001?
Since 2001, the area within 10 km of Inzai has lost about 100 hectares of forest (about 140 football pitches): 2.1% of the forest it had in 2000. Most of it (80%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Inzai shrank from about 5,550 hectares to 5,420 hectares, a net loss of about 125 hectares (−2.3%). New forest grew on about 100 hectares, but 225 hectares were lost.
What is the tree count in Inzai?
Inzai has an estimated 133,222 trees across the 11.72 km² of land measured — 45.5% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Inzai need?
Inzai has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Inzai's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Takefukuro, 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 Takefukuro; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address