City report · Samoa
Apia Air quality today
Air quality in Apia currently reads AQI 40 (Good): Air quality is satisfactory for everyone.
AQI 40
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 7.4
- tree cover
- 49.9%
- trees in this area
- 109K
- more trees needed
- 0
Measured across a 2 km radius around Mulivai, Apia, Samoa (12.57 km²), from a satellite image of Sep 15, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Apia · AQI 40 (Good)
Apia's tree count comes to 108,952 trees across 8.74 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Apia today: AQI 40, Good
Main pollutant: PM2.5 · Observed Nov 11, 21:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
7.4
PM10
13.0
NO₂
0.0
O₃
39.0
SO₂
0.2
CO
79.0
- 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 Apia's daily AQI at 44 on average, from 32 on Nov 10 to an hourly peak of 56 on Nov 8.
Where Apia stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Apia: Healthy tree cover
49.9% tree cover against a 30% healthy-neighborhood target, across 8.74 km² of land.
Trees in this area
108,952
Target trees
108,952
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Apia lost?
There was almost no forest around Apia in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
The forest-loss maps don't cover this area.
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
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. Images: contains modified Copernicus Sentinel data. How it's measured
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Frequently asked
Questions about Apia
What is the air quality (AQI) in Apia right now?
The latest reading for Apia shows an AQI of 40 (Good), observed Nov 11, 21:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Apia today?
At AQI 40 (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 Apia been like this week?
Over the last 7 days, the CAMS air-quality model put Apia's daily AQI at 44 on average, from 32 on Nov 10 to an hourly peak of 56 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Apia lost since 2001?
There was almost no forest around Apia in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
What is the tree count in Apia?
Apia has an estimated 108,952 trees across the 8.74 km² of land measured — 49.9% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Apia need?
Apia has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Apia'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 Mulivai; the tree count is an estimate derived from that cover.
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