City report · Okayama, Japan
Okayama Air quality today
Air quality in Okayama currently reads AQI 55 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 55
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 11.0
- tree cover
- 12.8%
- trees in this area
- 38.5K
- more trees needed
- 51.8K
Measured across a 2 km radius around 2 Chome-1 Sakurabashi, Naka Ward, Okayama, 703-8285, Japan (12.57 km²), from a satellite image of Sep 19, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Okayama · AQI 55 (Moderate)
Okayama's tree count comes to 38,523 trees across 12.04 km² of land, 17 points below the 30% tree-cover level considered healthy for this area, so roughly 51,766 more trees would close the gap.
Air quality detail
Air quality in Okayama today: AQI 55, Moderate
Main pollutant: PM2.5 · Observed Nov 12, 01:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 岡山市中区長岡５８－２, 6.1 km away · median of 6 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
11.0
PM10
—
NO₂
13.2
O₃
—
SO₂
0.0
CO
343.7
Data: OpenAQ · Ministry of the Environment Air Pollutant Wide Area Monitoring System
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Okayama's daily AQI at 46 on average, from 34 on Nov 10 to an hourly peak of 68 on Nov 6.
Where Okayama stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Okayama: Critically low
12.8% tree cover against a 30% healthy-neighborhood target, across 12.04 km² of land.
Trees in this area
38,523
Target trees
90,289
More trees needed
51,766
CO₂ if planted / yr
1,139 t
Deforestation · 2001–2025
How much forest has Okayama lost?
Since 2001, the area within 10 km of Okayama has lost about 266 hectares of forest (about 370 football pitches): 4.1% of the forest it had in 2000. Most of it (50%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 266 haabout 370 football pitches
- Share of its forest
- 4.1%of what there was in 2000
- Cleared for good
- 133 hadeforestation: turned into farms, mines or towns
The worst year was 2025, when about 214 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 | 5 ha | under 1 ha | 6 ha |
| 2002 | under 1 ha | under 1 ha | 1 ha |
| 2003 | 1 ha | under 1 ha | 2 ha |
| 2004 | 4 ha | 1 ha | 5 ha |
| 2005 | 2 ha | 2 ha | 4 ha |
| 2006 | 1 ha | under 1 ha | 2 ha |
| 2007 | 4 ha | 6 ha | 10 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | 2 ha | 2 ha | 3 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | 1 ha | under 1 ha | 1 ha |
| 2012 | under 1 ha | 3 ha | 3 ha |
| 2013 | under 1 ha | under 1 ha | 1 ha |
| 2014 | 1 ha | under 1 ha | 2 ha |
| 2015 | under 1 ha | under 1 ha | 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 | 3 ha | 2 ha | 4 ha |
| 2020 | 1 ha | under 1 ha | 2 ha |
| 2021 | under 1 ha | under 1 ha | 1 ha |
| 2022 | 1 ha | under 1 ha | 2 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | 103 ha | 111 ha | 214 ha |
What is causing deforestation around Okayama?
- Towns and roadscleared for good50% · 134 ha
- Loggingcan grow back4.4% · 12 ha
- Unknown causescause unknown45% · 120 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
- 7,480 ha
- Forest in 2020
- 7,480 ha
- Overall change
- +6 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Okayama stayed about the same size, at about 7,480 hectares: new forest grew on about 62 hectares, and about 56 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 Okayama
What is the air quality (AQI) in Okayama right now?
The latest reading for Okayama shows an AQI of 55 (Moderate), measured Nov 12, 01:00 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is 岡山市中区長岡５８－２, 6.1 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Okayama today?
At AQI 55 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Okayama been like this week?
Over the last 7 days, the CAMS air-quality model put Okayama's daily AQI at 46 on average, from 34 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 Okayama lost since 2001?
Since 2001, the area within 10 km of Okayama has lost about 266 hectares of forest (about 370 football pitches): 4.1% of the forest it had in 2000. Most of it (50%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Okayama stayed about the same size, at about 7,480 hectares: new forest grew on about 62 hectares, and about 56 hectares were lost.
What is the tree count in Okayama?
Okayama has an estimated 38,523 trees across the 12.04 km² of land measured — 12.8% tree cover, 17 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Okayama need?
Okayama needs roughly 51,766 more trees to close a 17-point shortfall against its 30% tree-cover target — about 1,139 t of extra CO₂ absorbed per year once grown.
How are Okayama's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near 2 Chome-1 Sakurabashi, 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 2 Chome-1 Sakurabashi; the tree count is an estimate derived from that cover.
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