City report · Tonga
Nuku‘alofa Air quality today
Air quality in Nuku‘alofa currently reads AQI 58 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 58
Moderate
- PM2.5, fine particles (µg/m³)
- 13.7
- tree cover
- 23.9%
- trees in this area
- 45.1K
- more trees needed
- 11.5K
Measured across a 2 km radius around Nuku'alofa, Tonga (12.57 km²), from a satellite image of Aug 4, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Nuku‘alofa · AQI 58 (Moderate)
Nuku‘alofa's tree count comes to 45,126 trees across 7.55 km² of land, 6 points below the 30% tree-cover level considered healthy for this area, so roughly 11,517 more trees would close the gap.
Air quality detail
Air quality in Nuku‘alofa today: AQI 58, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 19:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
13.7
PM10
23.4
NO₂
0.1
O₃
50.0
SO₂
0.2
CO
66.0
- 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 Nuku‘alofa's daily AQI at 49 on average, from 35 on Nov 7 to an hourly peak of 63 on Nov 5.
Where Nuku‘alofa stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Nuku‘alofa: Below target
23.9% tree cover against a 30% healthy-neighborhood target, across 7.55 km² of land.
Trees in this area
45,126
Target trees
56,643
More trees needed
11,517
CO₂ if planted / yr
253.4 t
Deforestation · 2001–2025
How much forest has Nuku‘alofa lost?
There was almost no forest around Nuku‘alofa 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 Nuku‘alofa
What is the air quality (AQI) in Nuku‘alofa right now?
The latest reading for Nuku‘alofa shows an AQI of 58 (Moderate), observed Nov 11, 19:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Nuku‘alofa today?
At AQI 58 (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 Nuku‘alofa been like this week?
Over the last 7 days, the CAMS air-quality model put Nuku‘alofa's daily AQI at 49 on average, from 35 on Nov 7 to an hourly peak of 63 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Nuku‘alofa lost since 2001?
There was almost no forest around Nuku‘alofa 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 Nuku‘alofa?
Nuku‘alofa has an estimated 45,126 trees across the 7.55 km² of land measured — 23.9% tree cover, 6 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Nuku‘alofa need?
Nuku‘alofa needs roughly 11,517 more trees to close a 6-point shortfall against its 30% tree-cover target — about 253.4 t of extra CO₂ absorbed per year once grown.
How are Nuku‘alofa'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 Nuku'alofa; the tree count is an estimate derived from that cover.
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