City report · Hiroshima, Japan
Onomichi Air quality today
Air quality in Onomichi currently reads AQI 18 (Good): Air quality is satisfactory for everyone.
AQI 18
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 2.9
- tree cover
- 45.1%
- trees in this area
- 131K
- more trees needed
- 0
Measured across a 2 km radius around 2 Chome-17 Nagae, Onomichi, Hiroshima 722-0046, Japan (12.57 km²), from a satellite image of Aug 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Onomichi · AQI 18 (Good)
Onomichi's tree count comes to 131,343 trees across 11.65 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Onomichi today: AQI 18, Good
Main pollutant: PM2.5 · Observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 145 km, e.g. Imabari and Himeji
Health signal
Air quality is satisfactory for everyone.
PM2.5
2.9
PM10
10.7
NO₂
12.0
O₃
81.0
SO₂
7.7
CO
265.0
- 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 Onomichi's daily AQI at 39 on average, from 27 on Nov 10 to an hourly peak of 68 on Nov 6.
Where Onomichi stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Onomichi: Healthy tree cover
45.1% tree cover against a 30% healthy-neighborhood target, across 11.65 km² of land.
Trees in this area
131,343
Target trees
131,343
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Onomichi lost?
Since 2001, the area within 10 km of Onomichi has lost about 247 hectares of forest (about 350 football pitches): 1.9% of the forest it had in 2000. The biggest cause was wildfires (44%), after which forest can grow back. About 65 hectares (26%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from June 2017 of a 5 × 5 km area about 6 km northwest of the city center.
- Forest lost since 2001
- 247 haabout 350 football pitches
- Share of its forest
- 1.9%of what there was in 2000
- Cleared for good
- 65 hadeforestation: turned into farms, mines or towns
The worst year was 2006, when about 55 hectares of forest were lost, mostly to wildfires.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 2 ha | 4 ha | 7 ha |
| 2002 | 2 ha | 4 ha | 7 ha |
| 2003 | 6 ha | 7 ha | 13 ha |
| 2004 | 12 ha | 5 ha | 17 ha |
| 2005 | 7 ha | 5 ha | 12 ha |
| 2006 | 7 ha | 48 ha | 55 ha |
| 2007 | 10 ha | 8 ha | 18 ha |
| 2008 | 1 ha | 1 ha | 2 ha |
| 2009 | 3 ha | under 1 ha | 4 ha |
| 2010 | 2 ha | 4 ha | 6 ha |
| 2011 | 1 ha | under 1 ha | 2 ha |
| 2012 | 4 ha | 26 ha | 31 ha |
| 2013 | 1 ha | 20 ha | 21 ha |
| 2014 | under 1 ha | under 1 ha | 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 1 ha | 6 ha | 7 ha |
| 2017 | under 1 ha | 5 ha | 5 ha |
| 2018 | under 1 ha | 10 ha | 11 ha |
| 2019 | under 1 ha | 4 ha | 4 ha |
| 2020 | under 1 ha | 7 ha | 7 ha |
| 2021 | under 1 ha | 5 ha | 5 ha |
| 2022 | under 1 ha | 4 ha | 4 ha |
| 2023 | under 1 ha | 2 ha | 3 ha |
| 2024 | under 1 ha | 2 ha | 3 ha |
| 2025 | under 1 ha | 3 ha | 3 ha |
What is causing deforestation around Onomichi?
- Wildfirescan grow back44% · 108 ha
- Towns and roadscleared for good26% · 63 ha
- Loggingcan grow back24% · 58 ha
Also: mining and energy, storms, floods and other natural causes, 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
- 15,300 ha
- Forest in 2020
- 15,300 ha
- Overall change
- +52 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Onomichi stayed about the same size, at about 15,300 hectares: new forest grew on about 149 hectares, and about 96 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 Onomichi
Same 2 km radius, same index — so they compare directly.
Build your own
Compare Onomichi with anywhere
This place
Onomichi
Use this data
Put Onomichi's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Onomichi
What is the air quality (AQI) in Onomichi right now?
The latest reading for Onomichi shows an AQI of 18 (Good), observed Nov 11, 11:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Onomichi today?
At AQI 18 (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 Onomichi been like this week?
Over the last 7 days, the CAMS air-quality model put Onomichi's daily AQI at 39 on average, from 27 on Nov 10 to an hourly peak of 68 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 Onomichi lost since 2001?
Since 2001, the area within 10 km of Onomichi has lost about 247 hectares of forest (about 350 football pitches): 1.9% of the forest it had in 2000. The biggest cause was wildfires (44%), after which forest can grow back. About 65 hectares (26%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Onomichi stayed about the same size, at about 15,300 hectares: new forest grew on about 149 hectares, and about 96 hectares were lost.
What is the tree count in Onomichi?
Onomichi has an estimated 131,343 trees across the 11.65 km² of land measured — 45.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Onomichi need?
Onomichi has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Onomichi'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 2 Chome-17 Nagae; 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