City report · Hiroshima, Japan
Hatsukaichi Air quality today
Air quality in Hatsukaichi currently reads AQI 33 (Good): Air quality is satisfactory for everyone.
AQI 33
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 6.0
- tree cover
- 13.3%
- trees in this area
- 30.1K
- more trees needed
- 37.8K
Measured across a 2 km radius around 1 Chome-7 Shimohera, Hatsukaichi, Hiroshima 738-0023, Japan (12.57 km²), from a satellite image of Aug 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hatsukaichi · AQI 33 (Good)
Hatsukaichi's tree count comes to 30,126 trees across 9.06 km² of land, 17 points below the 30% tree-cover level considered healthy for this area, so roughly 37,827 more trees would close the gap.
Air quality detail
Air quality in Hatsukaichi today: AQI 33, Good
Main pollutant: PM2.5 · Observed Nov 12, 02:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 広島市西区己斐本町３－１３, 9.6 km away · median of 3 stations
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.0
PM10
—
NO₂
11.3
O₃
—
SO₂
2.6
CO
229.1
Data: OpenAQ · Ministry of the Environment Air Pollutant Wide Area Monitoring System
- 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 Hatsukaichi's daily AQI at 39 on average, from 24 on Nov 10 to an hourly peak of 69 on Nov 6.
Where Hatsukaichi stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hatsukaichi: Critically low
13.3% tree cover against a 30% healthy-neighborhood target, across 9.06 km² of land.
Trees in this area
30,126
Target trees
67,953
More trees needed
37,827
CO₂ if planted / yr
832.2 t
Deforestation · 2001–2025
How much forest has Hatsukaichi lost?
Since 2001, the area within 10 km of Hatsukaichi has lost about 616 hectares of forest (about 860 football pitches): 4.5% of the forest it had in 2000. The biggest cause was logging (49%), after which forest can grow back. About 304 hectares (49%) was deforestation: forest cleared for good for farms, mines or towns.
2018: satellite photo from June 2018 of a 5 × 5 km area about 7 km northwest of the city center.
- Forest lost since 2001
- 616 haabout 860 football pitches
- Share of its forest
- 4.5%of what there was in 2000
- Cleared for good
- 304 hadeforestation: turned into farms, mines or towns
The worst year was 2018, when about 80 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 | 8 ha | 11 ha |
| 2002 | 6 ha | 18 ha | 23 ha |
| 2003 | 4 ha | 20 ha | 24 ha |
| 2004 | 2 ha | 13 ha | 15 ha |
| 2005 | 5 ha | 19 ha | 24 ha |
| 2006 | 4 ha | 19 ha | 23 ha |
| 2007 | 3 ha | 11 ha | 14 ha |
| 2008 | 10 ha | 25 ha | 35 ha |
| 2009 | 9 ha | 22 ha | 30 ha |
| 2010 | 3 ha | 15 ha | 18 ha |
| 2011 | 6 ha | 12 ha | 17 ha |
| 2012 | 49 ha | 5 ha | 54 ha |
| 2013 | 26 ha | 1 ha | 27 ha |
| 2014 | 4 ha | 5 ha | 8 ha |
| 2015 | 2 ha | 3 ha | 6 ha |
| 2016 | 4 ha | 9 ha | 13 ha |
| 2017 | 1 ha | 22 ha | 24 ha |
| 2018 | 59 ha | 21 ha | 80 ha |
| 2019 | 4 ha | 14 ha | 18 ha |
| 2020 | 2 ha | 8 ha | 10 ha |
| 2021 | 3 ha | 7 ha | 10 ha |
| 2022 | 12 ha | 14 ha | 26 ha |
| 2023 | 39 ha | 7 ha | 46 ha |
| 2024 | 33 ha | 10 ha | 42 ha |
| 2025 | 12 ha | 7 ha | 19 ha |
What is causing deforestation around Hatsukaichi?
- Loggingcan grow back49% · 302 ha
- Towns and roadscleared for good29% · 179 ha
- Mining and energycleared for good20% · 125 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
- 14,500 ha
- Forest in 2020
- 14,300 ha
- Overall change
- −135 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hatsukaichi stayed about the same size, at about 14,300 hectares: new forest grew on about 79 hectares, and about 214 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 Hatsukaichi
What is the air quality (AQI) in Hatsukaichi right now?
The latest reading for Hatsukaichi shows an AQI of 33 (Good), measured Nov 12, 02:00 local time by 3 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 広島市西区己斐本町３－１３, 9.6 km away). The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Hatsukaichi today?
At AQI 33 (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 Hatsukaichi been like this week?
Over the last 7 days, the CAMS air-quality model put Hatsukaichi's daily AQI at 39 on average, from 24 on Nov 10 to an hourly peak of 69 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 Hatsukaichi lost since 2001?
Since 2001, the area within 10 km of Hatsukaichi has lost about 616 hectares of forest (about 860 football pitches): 4.5% of the forest it had in 2000. The biggest cause was logging (49%), after which forest can grow back. About 304 hectares (49%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Hatsukaichi stayed about the same size, at about 14,300 hectares: new forest grew on about 79 hectares, and about 214 hectares were lost.
What is the tree count in Hatsukaichi?
Hatsukaichi has an estimated 30,126 trees across the 9.06 km² of land measured — 13.3% tree cover, 17 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Hatsukaichi need?
Hatsukaichi needs roughly 37,827 more trees to close a 17-point shortfall against its 30% tree-cover target — about 832.2 t of extra CO₂ absorbed per year once grown.
How are Hatsukaichi's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 1 Chome-7 Shimohera, 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 1 Chome-7 Shimohera; the tree count is an estimate derived from that cover.
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