City report · Brazil · Rio Grande do Sul
Porto Alegre
Measured across a 2 km radius around Historical Centre, Porto Alegre - RS, Brazil (12.57 km²)
- Tree cover
- 22.7%
- Air quality
- 35Good
- Trees in this area
- 43.9K
- More trees needed
- 14.1K
- Area analyzed
- 7.74 km²land, in a 12.57 km² circle
- Satellite image
- Sep 25, 2026
Porto Alegre's tree count comes to 43,930 trees across 7.74 km² of land — 7 points below the 30% tree-cover level considered healthy for this area, meaning roughly 14,127 more trees would close the gap. Air quality currently reads AQI 35 (Good): Air quality is satisfactory for everyone.
Tree cover detail
Below target
22.7% tree cover against a 30% healthy-neighborhood target, across 7.74 km² of land.
Trees in this area
43,930
Target trees
58,057
More trees needed
14,127
CO₂ if planted / yr
310.8 t
Air quality detail
AQI 35Good
Observed Sep 27, 01:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.4
PM10
11.5
NO₂
3.4
O₃
52.0
SO₂
1.5
CO
82.0
Frequently asked
Questions about Porto Alegre
What is the tree count in Porto Alegre?
Porto Alegre has an estimated 43,930 trees across the 7.74 km² of land measured — 22.7% tree cover, 7 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Porto Alegre need?
Porto Alegre needs roughly 14,127 more trees to close a 7-point shortfall against its 30% tree-cover target — about 310.8 t of extra CO₂ absorbed per year once grown.
What is the air quality (AQI) in Porto Alegre right now?
The latest reading for Porto Alegre shows an AQI of 35 (Good), observed Sep 27, 01:00 local time via Open-Meteo / CAMS, US EPA index. Air quality is satisfactory for everyone.
How is Porto Alegre's tree cover and air quality measured?
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 Historical Centre; the tree count is an estimate derived from that cover. Air-quality readings come from Open-Meteo / CAMS, US EPA index and may differ from street-level monitors.
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